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Mozilla Foundation Security Advisory 2013-101

Title: Memory corruption in workers
Impact: Critical
Announced: October 29, 2013
Reporter: Nils
Products: Firefox, Thunderbird, Seamonkey

Fixed in: Firefox 25.0
  Firefox ESR 24.1
  Firefox ESR 17.0.10
  Thunderbird 24.1
  Thunderbird ESR 17.0.10
  Seamonkey 2.22


Security researcher Nils used the Address Sanitizer tool while fuzzing to discover a memory corruption issue with the JavaScript engine when using workers with direct proxies. This results in a potentially exploitable crash.

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