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Gentoo Linux Security Advisory GLSA 200505-16
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http://security.gentoo.org/
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Severity: Normal
Title: ImageMagick, GraphicsMagick: Denial of Service
vulnerability
Date: May 21, 2005
Bugs: #90423, #90595
ID: 200505-16

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Synopsis
========

ImageMagick and GraphicsMagick utilities can be abused to perform a
Denial of Service attack.

Background
==========

Both ImageMagick and GraphicsMagick are collection of tools to read,
write and manipulate images in many formats.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 media-gfx/imagemagick < 6.2.2.3 >= 6.2.2.3
2 media-gfx/graphicsmagick < 1.1.6-r1 >= 1.1.6-r1
-------------------------------------------------------------------
2 affected packages on all of their supported architectures.
-------------------------------------------------------------------

Description
===========

Tavis Ormandy of the Gentoo Linux Security Audit Team discovered a
Denial of Service vulnerability in the XWD decoder of ImageMagick and
GraphicsMagick when setting a color mask to zero.

Impact
======

A remote attacker could submit a specially crafted image to a user or
an automated system making use of an affected utility, resulting in a
Denial of Service by consumption of CPU time.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All ImageMagick users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-gfx/imagemagick-6.2.2.3"

All GraphicsMagick users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-gfx/graphicsmagick-1.1.6-r1"

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

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

http://security.gentoo.org/glsa/glsa-200505-16.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 (dot) org [email concealed] or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2005 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/2.0

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