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### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE111_Unsafe_JNI; import testcasesupport.AbstractTestCaseBadOnly; import testcasesupport.IO; import java.io.; import java.util.logging.Level; public class CWE111_Unsafe_JNI__console_01 extends AbstractTestCaseBadOnly { native String test(String s1, int len); static { try { System.loadLibrary("JNITest"); } catch (UnsatisfiedLinkError errorUnsatisfiedLink) { IO.logger.log(Level.WARNING, "Error, the library does not exist", errorUnsatisfiedLink); } } public void bad() throws IOException { InputStreamReader readerInputStream = null; BufferedReader readerBuffered = null; int intNumber = 0; try { IO.writeLine("Enter a string: (asdf)" ); readerInputStream = new InputStreamReader(System.in, "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); String stringLine = readerBuffered.readLine(); IO.writeLine("How long was your string? (200) "); intNumber = Integer.parseInt(readerBuffered.readLine()); IO.writeLine("Result from native method: " + test(stringLine, intNumber)); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); return; } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } } } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. / * @description * Java code makes a call into a potentially unsafe unmanaged DLL. * The bad case allows the user to specify the length of the input string. * In addition, the case does not recognize the limitations of the unmanaged * code and does no input validation. * * In order to get this to run, you need to place the JNITest.dll (Windows) * or libJNITest (Linux) in your Java library path. * * / package testcases.CWE111_Unsafe_JNI; import testcasesupport.AbstractTestCaseBadOnly; import testcasesupport.IO; import java.io.; import java.util.logging.Level; public class CWE111_Unsafe_JNI__console_01 extends AbstractTestCaseBadOnly { native String test(String s1, int len); static { try { System.loadLibrary("JNITest"); /* load JNITest.dll or libJNITest.so / } catch (UnsatisfiedLinkError errorUnsatisfiedLink) { IO.logger.log(Level.WARNING, "Error, the library does not exist", errorUnsatisfiedLink); } } public void bad() throws IOException { InputStreamReader readerInputStream = null; BufferedReader readerBuffered = null; int intNumber = 0; try { IO.writeLine("Enter a string: (asdf)" ); readerInputStream = new InputStreamReader(System.in, "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); String stringLine = readerBuffered.readLine(); IO.writeLine("How long was your string? (200) "); intNumber = Integer.parseInt(readerBuffered.readLine()); IO.writeLine("Result from native method: " + test(stringLine, intNumber)); / FLAW: Using an unsafe JNI method / } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); return; } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } } } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_01 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B(request, response); goodB2G(request, response); } private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; data = "foo"; if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } private void goodB2G(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_01.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-01.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 01 Baseline * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_01 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B(request, response); goodB2G(request, response); } / goodG2B() - use goodsource and badsink / private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; / FIX: Use a hardcoded string / data = "foo"; if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } / goodB2G() - use badsource and goodsink / private void goodB2G(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_02 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (true) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (true) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (false) { data = null; } else { data = "foo"; } if (true) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (true) { data = "foo"; } else { data = null; } if (true) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (true) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (false) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (true) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (true) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_02.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-02.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 02 Control flow: if(true) and if(false) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_02 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (true) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (true) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first true to false / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (false) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (true) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (true) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (true) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second true to false / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (true) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (false) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (true) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (true) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_03 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (5==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (5==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (5!=5) { data = null; } else { data = "foo"; } if (5==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (5==5) { data = "foo"; } else { data = null; } if (5==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (5==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (5!=5) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (5==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (5==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_03.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-03.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 03 Control flow: if(5==5) and if(5!=5) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_03 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (5==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (5==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first 5==5 to 5!=5 / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (5!=5) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (5==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (5==5) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (5==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second 5==5 to 5!=5 / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (5==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (5!=5) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (5==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (5==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_04 extends AbstractTestCaseServlet { private static final boolean PRIVATE_STATIC_FINAL_TRUE = true; private static final boolean PRIVATE_STATIC_FINAL_FALSE = false; public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_TRUE) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (PRIVATE_STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FALSE) { data = null; } else { data = "foo"; } if (PRIVATE_STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_TRUE) { data = "foo"; } else { data = null; } if (PRIVATE_STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_TRUE) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (PRIVATE_STATIC_FINAL_FALSE) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_TRUE) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (PRIVATE_STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_04.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-04.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 04 Control flow: if(PRIVATE_STATIC_FINAL_TRUE) and if(PRIVATE_STATIC_FINAL_FALSE) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_04 extends AbstractTestCaseServlet { / The two variables below are declared "final", so a tool should * be able to identify that reads of these will always return their * initialized values. / private static final boolean PRIVATE_STATIC_FINAL_TRUE = true; private static final boolean PRIVATE_STATIC_FINAL_FALSE = false; public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_TRUE) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (PRIVATE_STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first PRIVATE_STATIC_FINAL_TRUE to PRIVATE_STATIC_FINAL_FALSE / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FALSE) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (PRIVATE_STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_TRUE) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (PRIVATE_STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second PRIVATE_STATIC_FINAL_TRUE to PRIVATE_STATIC_FINAL_FALSE / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_TRUE) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (PRIVATE_STATIC_FINAL_FALSE) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_TRUE) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (PRIVATE_STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_05 extends AbstractTestCaseServlet { private boolean privateTrue = true; private boolean privateFalse = false; public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateTrue) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (privateTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFalse) { data = null; } else { data = "foo"; } if (privateTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateTrue) { data = "foo"; } else { data = null; } if (privateTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateTrue) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (privateFalse) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateTrue) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (privateTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_05.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-05.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 05 Control flow: if(privateTrue) and if(privateFalse) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_05 extends AbstractTestCaseServlet { / The two variables below are not defined as "final", but are never * assigned any other value, so a tool should be able to identify that * reads of these will always return their initialized values. / private boolean privateTrue = true; private boolean privateFalse = false; public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateTrue) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first privateTrue to privateFalse / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFalse) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (privateTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateTrue) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second privateTrue to privateFalse / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateTrue) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateFalse) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateTrue) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_06 extends AbstractTestCaseServlet { private static final int PRIVATE_STATIC_FINAL_FIVE = 5; public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FIVE==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (PRIVATE_STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FIVE!=5) { data = null; } else { data = "foo"; } if (PRIVATE_STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FIVE==5) { data = "foo"; } else { data = null; } if (PRIVATE_STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FIVE==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (PRIVATE_STATIC_FINAL_FIVE!=5) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FIVE==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (PRIVATE_STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_06.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-06.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 06 Control flow: if(PRIVATE_STATIC_FINAL_FIVE==5) and if(PRIVATE_STATIC_FINAL_FIVE!=5) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_06 extends AbstractTestCaseServlet { / The variable below is declared "final", so a tool should be able * to identify that reads of this will always give its initialized * value. / private static final int PRIVATE_STATIC_FINAL_FIVE = 5; public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FIVE==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (PRIVATE_STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first PRIVATE_STATIC_FINAL_FIVE==5 to PRIVATE_STATIC_FINAL_FIVE!=5 / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FIVE!=5) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (PRIVATE_STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FIVE==5) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (PRIVATE_STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second PRIVATE_STATIC_FINAL_FIVE==5 to PRIVATE_STATIC_FINAL_FIVE!=5 / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FIVE==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (PRIVATE_STATIC_FINAL_FIVE!=5) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (PRIVATE_STATIC_FINAL_FIVE==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (PRIVATE_STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_07 extends AbstractTestCaseServlet { private int privateFive = 5; public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFive==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (privateFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFive!=5) { data = null; } else { data = "foo"; } if (privateFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFive==5) { data = "foo"; } else { data = null; } if (privateFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFive==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (privateFive!=5) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFive==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (privateFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_07.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-07.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 07 Control flow: if(privateFive==5) and if(privateFive!=5) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_07 extends AbstractTestCaseServlet { / The variable below is not declared "final", but is never assigned * any other value so a tool should be able to identify that reads of * this will always give its initialized value. / private int privateFive = 5; public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFive==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first privateFive==5 to privateFive!=5 / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFive!=5) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (privateFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFive==5) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second privateFive==5 to privateFive!=5 / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFive==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateFive!=5) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateFive==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_08 extends AbstractTestCaseServlet { private boolean privateReturnsTrue() { return true; } private boolean privateReturnsFalse() { return false; } public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateReturnsTrue()) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (privateReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateReturnsFalse()) { data = null; } else { data = "foo"; } if (privateReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateReturnsTrue()) { data = "foo"; } else { data = null; } if (privateReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateReturnsTrue()) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (privateReturnsFalse()) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateReturnsTrue()) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (privateReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_08.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-08.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 08 Control flow: if(privateReturnsTrue()) and if(privateReturnsFalse()) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_08 extends AbstractTestCaseServlet { / The methods below always return the same value, so a tool * should be able to figure out that every call to these * methods will return true or return false. / private boolean privateReturnsTrue() { return true; } private boolean privateReturnsFalse() { return false; } public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateReturnsTrue()) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first privateReturnsTrue() to privateReturnsFalse() / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateReturnsFalse()) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (privateReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateReturnsTrue()) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second privateReturnsTrue() to privateReturnsFalse() / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateReturnsTrue()) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateReturnsFalse()) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (privateReturnsTrue()) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (privateReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_09 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_TRUE) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FALSE) { data = null; } else { data = "foo"; } if (IO.STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_TRUE) { data = "foo"; } else { data = null; } if (IO.STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_TRUE) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.STATIC_FINAL_FALSE) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_TRUE) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_09.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-09.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 09 Control flow: if(IO.STATIC_FINAL_TRUE) and if(IO.STATIC_FINAL_FALSE) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_09 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_TRUE) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first IO.STATIC_FINAL_TRUE to IO.STATIC_FINAL_FALSE / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FALSE) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (IO.STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_TRUE) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second IO.STATIC_FINAL_TRUE to IO.STATIC_FINAL_FALSE / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_TRUE) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.STATIC_FINAL_FALSE) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_TRUE) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.STATIC_FINAL_TRUE) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_10 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticTrue) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.staticTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFalse) { data = null; } else { data = "foo"; } if (IO.staticTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticTrue) { data = "foo"; } else { data = null; } if (IO.staticTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticTrue) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.staticFalse) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticTrue) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.staticTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_10.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-10.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 10 Control flow: if(IO.staticTrue) and if(IO.staticFalse) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_10 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticTrue) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.staticTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first IO.staticTrue to IO.staticFalse / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFalse) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (IO.staticTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticTrue) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.staticTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second IO.staticTrue to IO.staticFalse / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticTrue) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.staticFalse) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticTrue) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.staticTrue) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_11 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticReturnsTrue()) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if(IO.staticReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticReturnsFalse()) { data = null; } else { data = "foo"; } if (IO.staticReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticReturnsTrue()) { data = "foo"; } else { data = null; } if (IO.staticReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticReturnsTrue()) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.staticReturnsFalse()) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticReturnsTrue()) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.staticReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_11.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-11.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 11 Control flow: if(IO.staticReturnsTrue()) and if(IO.staticReturnsFalse()) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_11 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticReturnsTrue()) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if(IO.staticReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first IO.staticReturnsTrue() to IO.staticReturnsFalse() / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticReturnsFalse()) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (IO.staticReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticReturnsTrue()) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.staticReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second IO.staticReturnsTrue() to IO.staticReturnsFalse() / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticReturnsTrue()) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.staticReturnsFalse()) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticReturnsTrue()) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.staticReturnsTrue()) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_12 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if(IO.staticReturnsTrueOrFalse()) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = "foo"; } if(IO.staticReturnsTrueOrFalse()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if(IO.staticReturnsTrueOrFalse()) { data = "foo"; } else { data = "foo"; } if(IO.staticReturnsTrueOrFalse()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } else { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if(IO.staticReturnsTrueOrFalse()) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } if(IO.staticReturnsTrueOrFalse()) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B(request, response); goodB2G(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_12.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-12.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 12 Control flow: if(IO.staticReturnsTrueOrFalse()) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_12 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if(IO.staticReturnsTrueOrFalse()) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / FIX: Use a hardcoded string / data = "foo"; } if(IO.staticReturnsTrueOrFalse()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodG2B() - use goodsource and badsink by changing the first "if" so that * both branches use the GoodSource / private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if(IO.staticReturnsTrueOrFalse()) { / FIX: Use a hardcoded string / data = "foo"; } else { / FIX: Use a hardcoded string / data = "foo"; } if(IO.staticReturnsTrueOrFalse()) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } else { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G() - use badsource and goodsink by changing the second "if" so that * both branches use the GoodSink / private void goodB2G(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if(IO.staticReturnsTrueOrFalse()) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } if(IO.staticReturnsTrueOrFalse()) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B(request, response); goodB2G(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_13 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FIVE==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FIVE!=5) { data = null; } else { data = "foo"; } if (IO.STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FIVE==5) { data = "foo"; } else { data = null; } if (IO.STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FIVE==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.STATIC_FINAL_FIVE!=5) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FIVE==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_13.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-13.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 13 Control flow: if(IO.STATIC_FINAL_FIVE==5) and if(IO.STATIC_FINAL_FIVE!=5) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_13 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FIVE==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first IO.STATIC_FINAL_FIVE==5 to IO.STATIC_FINAL_FIVE!=5 / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FIVE!=5) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (IO.STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FIVE==5) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second IO.STATIC_FINAL_FIVE==5 to IO.STATIC_FINAL_FIVE!=5 / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FIVE==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.STATIC_FINAL_FIVE!=5) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.STATIC_FINAL_FIVE==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.STATIC_FINAL_FIVE==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }
### Human: Please review the following code and annotate comments on possible vulnerabilities or potential threats that may exist. package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_14 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFive==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.staticFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFive!=5) { data = null; } else { data = "foo"; } if (IO.staticFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFive==5) { data = "foo"; } else { data = null; } if (IO.staticFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); response.addCookie(cookieSink); } } } private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFive==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.staticFive!=5) { IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFive==5) { data = ""; { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { socket = new Socket("host.example.org", 39544); readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { data = null; } if (IO.staticFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } } ### Assistant: Here are the results of the code review. /* TEMPLATE GENERATED TESTCASE FILE Filename: CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_14.java Label Definition File: CWE113_HTTP_Response_Splitting.label.xml Template File: sources-sinks-14.tmpl.java / / * @description * CWE: 113 HTTP Response Splitting * BadSource: connect_tcp Read data using an outbound tcp connection * GoodSource: A hardcoded string * Sinks: addCookieServlet * GoodSink: URLEncode input * BadSink : querystring to addCookie() * Flow Variant: 14 Control flow: if(IO.staticFive==5) and if(IO.staticFive!=5) * * / package testcases.CWE113_HTTP_Response_Splitting.s01; import testcasesupport.; import javax.servlet.http.; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.net.Socket; import java.util.logging.Level; import java.net.URLEncoder; public class CWE113_HTTP_Response_Splitting__connect_tcp_addCookieServlet_14 extends AbstractTestCaseServlet { public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFive==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.staticFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B1() - use goodsource and badsink by changing first IO.staticFive==5 to IO.staticFive!=5 / private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFive!=5) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } else { / FIX: Use a hardcoded string / data = "foo"; } if (IO.staticFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodG2B2() - use goodsource and badsink by reversing statements in first if / private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFive==5) { / FIX: Use a hardcoded string / data = "foo"; } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.staticFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", data); / POTENTIAL FLAW: Input not verified before inclusion in the cookie / response.addCookie(cookieSink); } } } / goodB2G1() - use badsource and goodsink by changing second IO.staticFive==5 to IO.staticFive!=5 / private void goodB2G1(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFive==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.staticFive!=5) { / INCIDENTAL: CWE 561 Dead Code, the code below will never run / IO.writeLine("Benign, fixed string"); } else { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } / goodB2G2() - use badsource and goodsink by reversing statements in second if / private void goodB2G2(HttpServletRequest request, HttpServletResponse response) throws Throwable { String data; if (IO.staticFive==5) { data = ""; / Initialize data / / Read data using an outbound tcp connection / { Socket socket = null; BufferedReader readerBuffered = null; InputStreamReader readerInputStream = null; try { / Read data using an outbound tcp connection / socket = new Socket("host.example.org", 39544); / read input from socket / readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8"); readerBuffered = new BufferedReader(readerInputStream); / POTENTIAL FLAW: Read data using an outbound tcp connection / data = readerBuffered.readLine(); } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO); } finally { / clean up stream reading objects / try { if (readerBuffered != null) { readerBuffered.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO); } try { if (readerInputStream != null) { readerInputStream.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO); } / clean up socket objects / try { if (socket != null) { socket.close(); } } catch (IOException exceptIO) { IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO); } } } } else { / INCIDENTAL: CWE 561 Dead Code, the code below will never run * but ensure data is inititialized before the Sink to avoid compiler errors / data = null; } if (IO.staticFive==5) { if (data != null) { Cookie cookieSink = new Cookie("lang", URLEncoder.encode(data, "UTF-8")); / FIX: use URLEncoder.encode to hex-encode non-alphanumerics / response.addCookie(cookieSink); } } } public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable { goodG2B1(request, response); goodG2B2(request, response); goodB2G1(request, response); goodB2G2(request, response); } / Below is the main(). It is only used when building this testcase on * its own for testing or for building a binary to use in testing binary * analysis tools. It is not used when compiling all the testcases as one * application, which is how source code analysis tools are tested. */ public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException { mainFromParent(args); } }

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