Stefan Esser has reported a vulnerability in Trac, which can be exploited by malicious users to disclose sensitive information and potentially compromise a vulnerable system.

The vulnerability is caused due to an input validation error in the "id" parameter when processing an attachment upload and download request. This can be exploited to retrieve any files accessible by the web server, or to upload files to writable directories by supplying arbitrary paths to the parameter.

The vulnerability has been reported in versions 0.8.3 and prior.

Solution
Update to version 0.8.4 or later.
Further details available to Secunia VIM customers

Provided and/or discovered by
Stefan Esser, Hardened-PHP Project.

Changelog
Further details available to Secunia VIM customers

Original Advisory
Edgewall Software:
http://projects.edgewall.com/trac/wiki/ChangeLog

Hardened-PHP Project:
http://www.hardened-php.net/advisory-012005.php

Deep Links
Links available to Secunia VIM customers