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Vulnerability of imagemagick: buffer overflow of Comments

Synthesis of the vulnerability 

An attacker can generate a buffer overflow of imagemagick, in order to trigger a denial of service, and possibly to execute code.
Impacted software: Debian, Unix (platform) ~ not comprehensive.
Severity of this computer vulnerability: 2/4.
Creation date: 30/08/2013.
Références of this announce: BID-62080, CVE-2013-4298, DSA-2750-1, VIGILANCE-VUL-13336.

Description of the vulnerability 

The ImageMagick application is used to process images.

A GIF image can contain a comment block. ImageMagick allocates a memory area to store it. However, the terminator '\0' is set after the end of the array.

An attacker can therefore generate a buffer overflow in imagemagick, in order to trigger a denial of service, and possibly to execute code.
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This vulnerability bulletin impacts software or systems such as Debian, Unix (platform) ~ not comprehensive.

Our Vigil@nce team determined that the severity of this security note is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this cybersecurity note.

Solutions for this threat 

imagemagick: version 6.7.8-8.
The version 6.7.8-8 is fixed:
  http://www.imagemagick.org/

imagemagick: patch for Comments.
A patch is available in information sources.

Debian: new imagemagick packages.
New packages are available:
  imagemagick 8:6.7.7.10-5+deb7u2
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