Apache Tomcat XSS vulnerability

Risk: Low
Local: No
Remote: Yes

CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 CVE-2008-1232: Apache Tomcat XSS vulnerability Severity: Low Vendor: The Apache Software Foundation Versions Affected: Tomcat 4.1.0 to 4.1.37 Tomcat 5.5.0 to 5.5.26 Tomcat 6.0.0 to 6.0.16 The unsupported Tomcat 3.x, 4.0.x and 5.0.x versions may be also affected Description: The message argument of HttpServletResponse.sendError() call is not only displayed on the error page, but is also used for the reason-phrase of HTTP response. This may include characters that are illegal in HTTP headers. It is possible for a specially crafted message to result in arbitrary content being injected into the HTTP response. For a successful XSS attack, unfiltered user supplied data must be included in the message argument. Mitigation: 6.0.x users should upgrade to 6.0.18 5.5.x users should obtain the latest source from svn or apply this patch which will be included from 5.5.27 http://svn.apache.org/viewvc?rev=680947&view=rev 4.1.x users should obtain the latest source from svn or apply this patch which will be included from 4.1.38 http://svn.apache.org/viewvc?rev=680947&view=rev (connector only) http://svn.apache.org/viewvc?rev=680948&view=rev Example: <%@page contentType="text/html"%> <% ~ // some unicode characters, that result in CRLF being printed ~ final String CRLF = "\u010D\u010A"; ~ final String payload = CRLF + CRLF + "<script type='text/javascript'>document.write('Hi, there!')</script><div style='display:none'>"; ~ final String message = "Authorization is required to access " + payload; ~ response.sendError(403, message); %> Credit: This issue was discovered by Konstantin Kolinko. References: http://tomcat.apache.org/security.html Mark Thomas -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkiTGFsACgkQb7IeiTPGAkNG6ACfY+P91mt1/h06Q8c5foCJldFp 9B8An2OvenCD+3nWbLazp6Th+lxWgL7f =lTUT -----END PGP SIGNATURE-----



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