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Mozilla Foundation Security Advisory 2011-09

Title: Crash caused by corrupted JPEG image
Impact: Critical
Announced: March 1, 2011
Reporter: Jordi Chancel
Products: Firefox, Thunderbird

Fixed in: Firefox 3.6.14
  Thunderbird 3.1.8


Security researcher Jordi Chancel reported that a JPEG image could be constructed that would be decoded incorrectly, causing data to be written past the end of a buffer created to store the image. An attacker could potentially craft such an image that would cause malicious code to be stored in memory and then later executed on a victim's computer.

Firefox 3.5 was not affected by this issue.