You are here: Security Center > Mozilla Foundation Security Advisories > MFSA 2009-56

Mozilla Foundation Security Advisory 2009-56

Title: Heap buffer overflow in GIF color map parser
Impact: Critical
Announced: October 27, 2009
Reporter: regenrecht, iDefense
Products: Firefox, SeaMonkey

Fixed in: Firefox 3.5.4
  Firefox 3.0.15
  SeaMonkey 2.0

This flaw does not affect products built on the Gecko 1.8 browser engine such as Thunderbird 2.


Security research firm iDefense reported that researcher regenrecht discovered a heap-based buffer overflow in Mozilla's GIF image parser. This vulnerability could potentially be used by an attacker to crash a victim's browser and run arbitrary code on their computer.