Apache Tomcat 5.0.x <= 5.0.30 / 5.5.x < 5.5.23 Content-Length HTTP Request Smuggling
Medium Nessus Plugin ID 17727
SynopsisThe remote web server is affected by an HTTP request smuggling vulnerability.
DescriptionAccording to its self-reported version number, the instance of Apache Tomcat listening on the remote host is 5.0.x equal to or prior to 5.0.30 or 5.5.x prior to 5.5.23. It is, therefore, affected by an HTTP request smuggling vulnerability.
Requests containing multiple 'content-length' headers are not rejected as invalid. This error can allow web-cache poisoning, cross-site scripting attacks and information disclosure.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
SolutionUpgrade to Apache Tomcat version 5.5.23 or later. Alternatively, use the latest SVN source for 5.0.x. SVN revision number 513079 fixes the issue.