A new security issue has been reported in Apache Tomcat versions 7 through 7.0.20, 6 through 6.0.33 and 5.5.0 through 5.5.33. According to the Tomcat mailing lists: "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....
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