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Mozilla Foundation Security Advisory 2013-35

Title: WebGL crash with Mesa graphics driver on Linux
Impact: Critical
Announced: April 2, 2013
Reporter: miaubiz
Products: Firefox, Thunderbird, SeaMonkey

Fixed in: Firefox 20.0
  Firefox ESR 17.0.5
  Thunderbird 17.0.5
  Thunderbird ESR 17.0.5
  SeaMonkey 2.17


Security researcher miaubiz used the Address Sanitizer tool to discover a crash in WebGL rendering when memory is freed that has not previously been allocated. This issue only affects Linux users who have Intel Mesa graphics drivers. The resulting crash could be potentially exploitable.

In general these flaws cannot be exploited through email in the Thunderbird and SeaMonkey products because scripting is disabled, but are potentially a risk in browser or browser-like contexts in those products.