[Full-disclosure] [ GLSA 200609-20 ] DokuWiki: Shell command injection and Denial of Service

[Matthias Geerdsen]

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Gentoo Linux Security Advisory                           GLSA 200609-20
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                                             http://security.gentoo.org/
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   Severity: High
      Title: DokuWiki: Shell command injection and Denial of Service
       Date: September 28, 2006
       Bugs: #149266
         ID: 200609-20

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Synopsis
========

DokuWiki is vulnerable to shell command injection and Denial of Service
attacks when using ImageMagick.

Background
==========

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

Affected packages
=================

     -------------------------------------------------------------------
      Package            /   Vulnerable   /                  Unaffected
     -------------------------------------------------------------------
   1  www-apps/dokuwiki      < 20060309e                   >= 20060309e

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"

References
==========

   [ 1 ] DokuWiki Announcement
         http://www.freelists.org/archives/dokuwiki/09-2006/msg00278.html

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

   http://security.gentoo.org/glsa/glsa-200609-20.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security at gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2006 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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