DokuWiki: Shell command injection and Denial of service

Background

DokuWiki is a wiki targeted at developer teams, workgroups and small companies. It does not use a database backend.

Description

Input validation flaws have been discovered in the image handling of fetch.php if ImageMagick is used, which is not the default method.

Impact

A remote attacker could exploit the flaws to execute arbitrary shell commands with the rights of the web server daemon or cause a Denial of Service.

Workaround

There is no known workaround at this time.

Resolution

All DokuWiki users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=www-apps/dokuwiki-20060309e"