TikiWiki: Arbitrary command execution

Background

TikiWiki is a web-based groupware and content management system (CMS), using PHP, ADOdb and Smarty.

Description

TikiWiki lacks a check on uploaded images in the Wiki edit page.

Impact

A malicious user could run arbitrary commands on the server by uploading and calling a PHP script.

Workaround

There is no known workaround at this time.

Resolution

All TikiWiki users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=www-apps/tikiwiki-1.8.4.1"

Note: Users with the vhosts USE flag set should manually use webapp-config to finalize the update.