Mozilla Foundation Security Advisory 2014-56

Miscellaneous memory safety hazards (rv:31.0 / rv:24.7)

July 22, 2014
Mozilla Developers
Firefox, Firefox ESR, Thunderbird
Fixed in
  • Firefox 31
  • Firefox ESR 24.7
  • Thunderbird 24.7
  • Thunderbird 31


Mozilla developers and community identified 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.


Christian Holler, David Keeler, and Byron Campen reported memory safety problems and crashes that affect Firefox ESR 24.6 and Firefox 30.

Christian Holler, Gary Kwong, Jesse Ruderman, Andrew McCreight, Alon Zakai, Bobby Holley, Jonathan Watt, Shu-yu Guo, Steve Fink, Terrence Cole, Gijs Kruitbosch, and Cătălin Badea reported memory safety problems and crashes that affect Firefox 30.