CVE-2009-2901
The autodeployment process in Apache Tomcat 5.5.0 through 5.5.28 and 6.0.0 through 6.0.20, when autoDeploy is enabled, deploys appBase files that remain from a failed undeploy, which might allow remote attackers to bypass intended authentication requirements via HTTP requests.
Date published : 2010-01-28
http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html