ImageMagick: Format string vulnerability — GLSA 200602-06

A vulnerability in ImageMagick allows attackers to crash the application and potentially execute arbitrary code.

Affected Packages

media-gfx/imagemagick on all architectures
Affected versions < 6.2.5.5
Unaffected versions >= 6.2.5.5

Background

ImageMagick is an application suite to manipulate and convert images. It is often used as a utility backend by web applications like forums, content management systems or picture galleries.

Description

The SetImageInfo function was found vulnerable to a format string mishandling. Daniel Kobras discovered that the handling of "%"-escaped sequences in filenames passed to the function is inadequate. This is a new vulnerability that is not addressed by GLSA 200503-11.

Impact

By feeding specially crafted file names to ImageMagick, an attacker can crash the program and possibly execute arbitrary code with the privileges of the user running ImageMagick.

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-6.2.5.5"

References

Release Date
February 13, 2006

Latest Revision
February 13, 2006: 01

Severity
normal

Exploitable
remote

Bugzilla entries