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Mozilla Foundation Security Advisory 2013-63

Title: Miscellaneous memory safety hazards (rv:23.0 / rv:17.0.8)
Impact: Critical
Announced: August 6, 2013
Reporter: Mozilla Developers
Products: Firefox, Thunderbird, Seamonkey

Fixed in: Firefox 23.0
  Firefox ESR 17.0.8
  Thunderbird 17.0.8
  Thunderbird ESR 17.0.8
  Seamonkey 2.20


Mozilla developers identified and fixed several memory safety bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these bugs showed evidence of memory corruption under certain circumstances, and we presume that with enough effort at least some of these could be exploited to run arbitrary code.

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


Jeff Gilbert and Henrik Skupin reported memory safety problems and crashes that affect Firefox ESR 17, and Firefox 22.

Ben Turner, Christian Holler, Andrew McCreight, Gary Kwong, Jan Varga, and Jesse Ruderman reported memory safety problems and crashes that affect Firefox 22.