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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2011.0880 Apache Tomcat Authentication bypass and information disclosure 30 August 2011 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Apache Tomcat 7.0.0 to 7.0.20 Apache Tomcat 6.0.0 to 6.0.33 Apache Tomcat 5.5.0 to 5.5.33 Publisher: The Apache Software Foundation Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Access Privileged Data -- Remote/Unauthenticated Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2011-3190 - --------------------------BEGIN INCLUDED TEXT-------------------- CVE-2011-3190 Apache Tomcat Authentication bypass and information disclosure Severity: Important Vendor: The Apache Software Foundation Versions Affected: - - Tomcat 7.0.0 to 7.0.20 - - Tomcat 6.0.0 to 6.0.33 - - Tomcat 5.5.0 to 5.5.33 - - Earlier, unsupported versions may also be affected Description: Apache Tomcat supports the AJP protocol which is used with reverse proxies to pass requests and associated data about the request from the reverse proxy to Tomcat. The AJP protocol is designed so that when a request includes a request body, an unsolicited AJP message is sent to Tomcat that includes the first part (or possibly all) of the request body. In certain circumstances, Tomcat did not process this message as a request body but as a new request. This permitted an attacker to have full control over the AJP message which allowed an attacker to (amongst other things): - - insert the name of an authenticated user - - insert any client IP address (potentially bypassing any client IP address filtering) - - trigger the mixing of responses between users The following AJP connector implementations are not affected: org.apache.jk.server.JkCoyoteHandler (5.5.x - default, 6.0.x - default) The following AJP connector implementations are affected: org.apache.coyote.ajp.AjpProtocol (6.0.x, 7.0.x - default) org.apache.coyote.ajp.AjpNioProtocol (7.0.x) org.apache.coyote.ajp.AjpAprProtocol (5.5.x, 6.0.x, 7.0.x) Further, this issue only applies if all of the following are are true for at least one resource: - - POST requests are accepted - - The request body is not processed Example: See https://issues.apache.org/bugzilla/show_bug.cgi?id=51698 Mitigation: Users of affected versions should apply one of the following mitigations: - - Upgrade to a version of Apache Tomcat that includes a fix for this issue when available - - Apply the appropriate patch - 7.0.x http://svn.apache.org/viewvc?rev=1162958&view=rev - 6.0.x http://svn.apache.org/viewvc?rev=1162959&view=rev - 5.5.x http://svn.apache.org/viewvc?rev=1162960&view=rev - - Configure the reverse proxy and Tomcat's AJP connector(s) to use the requiredSecret attribute - - Use the org.apache.jk.server.JkCoyoteHandler AJP connector (not available for Tomcat 7.0.x) Credit: The issue was reported via Apache Tomcat's public issue tracker. The Apache Tomcat security team strongly discourages reporting of undisclosed vulnerabilities via public channels. All Apache Tomcat security vulnerabilities should be reported to the private security team mailing list: security@tomcat.apache.org References: http://tomcat.apache.org/security.html http://tomcat.apache.org/security-7.html http://tomcat.apache.org/security-6.html http://tomcat.apache.org/security-5.html https://issues.apache.org/bugzilla/show_bug.cgi?id=51698 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. 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If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBTlw/W+4yVqjM2NGpAQLfsQ//dsjiGCzd07jpbMofxi652oD6r8RZG+hQ MZIELv3DaeACsZSimb1zsv7PvM1DYvwNzwLXbsBAOurL+yMFUjzdT6IPUE/n4Nu+ Yi5xonQJaDGfz5ubG9LU5oZqvciO1whVtU/8GHeEQXJt7+c2fpMBAjL/3qgWu5FF 2mSh9PTZK0C/WDKolEGZ6pPrIL/HbLQl7/JimQut8LTHJtbjjwOdCjP3hHRL6cgi 0CIF1Xa7gYtgXQIJbmTLWGwSlu4yLWOUJXWjxqG/HxyWNFjBAx82gu6aGbSfoCvo 4cqlr7XG0mYn+IyXOaF7c80rcLKRLhrnBe2Yimnx92HSlQSOEuDVtuxQ+gRQzDZN 5FPDP4M0FnlwrceIach8/BW3Ze+Y5Z+swWnq4cO8endkF+frqjyWKCywk087JGvG oRLL3dkOJeFuxZs6phEacNiX2VScHUbuG2QDYnR7yBju++kbaJD8+fqGoVvAi/ie 3TWZ8bGgC0Sqan50w/pRzz0pm1eC8kxIDAaDmCaPFrpTycX+MmJWb2XG69CTc8Q0 8zrebhtDxT7Sr9GCY6hM/wv5unDrHW4twMdo/Hv9tnnUtcP+UaoqjhcTmmEhvuAr pEpTWm2LCcU+BufNAhccMe9TJu/d0BaOpG86aoAgR5qdgRWZBuhsCPDuZ/DiuJSa ibRSDpRiXqs= =l5p2 -----END PGP SIGNATURE-----