You are here: Security Center > Mozilla Foundation Security Advisories > MFSA 2013-78

Mozilla Foundation Security Advisory 2013-78

Title: Integer overflow in ANGLE library
Impact: Critical
Announced: September 17, 2013
Reporter: Alex Chapman
Products: Firefox, Seamonkey

Fixed in: Firefox 24.0
  Seamonkey 2.21


Security researcher Alex Chapman reported that the Almost Native Graphics Layer Engine (ANGLE) library used by Mozilla is vulnerable to an integer overflow. This vulnerability is present because of insufficient bounds checking in the drawLineLoop function, which can be driven by web content to overflow allocated memory, leading to a potentially exploitable crash.

In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts.