Apache Tomcat 4.1.x < 4.1.38 / 5.5.x < 5.5.27 / 6.0.x < 6.0.18 Linking UTF-8 Traversal Arbitrary File Access

The version of Apache Tomcat running on the remote host is affected by a directory traversal vulnerability due to an issue with the UTF-8 charset implementation within the underlying JVM. An unauthenticated, remote attacker can exploit this, by encoding directory traversal sequences as UTF-8 in a request, to view arbitrary files on the remote host.

Note that successful exploitation requires that a context be configured with ‘allowLinking’ set to ‘true’ and the connector with ‘URIEncoding’ set to ‘UTF-8’, neither of which is a default setting.