ImageMagick could be made to crash or run programs as your login if it opened a specially crafted file.
It was discovered that ImageMagick incorrectly handled decoding GIF image comments. If a user or automated system using ImageMagick were tricked into opening a specially crafted GIF image, an attacker could exploit this to cause a denial of service or possibly execute code with the privileges of the user invoking the program.
10 September 2013
A security issue affects these releases of Ubuntu and its derivatives:
ImageMagick could be made to crash or run programs as your login if it opened a specially crafted file.
It was discovered that ImageMagick incorrectly handled decoding GIF image comments. If a user or automated system using ImageMagick were tricked into opening a specially crafted GIF image, an attacker could exploit this to cause a denial of service or possibly execute code with the privileges of the user invoking the program.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
Vulmon