Mozilla Foundation Security Advisory 2013-108
Title: Use-after-free in event listeners
Announced: December 10, 2013
Reporter: Tyson Smith, Jesse Schwartzentruber
Products: Firefox, Thunderbird, Seamonkey
Fixed in: Firefox 26
Firefox ESR 24.2
Security researchers Tyson Smith and Jesse
Schwartzentruber of the BlackBerry Security Automated Analysis Team
used the Address Sanitizer tool while fuzzing to discover a user-after-free when
interacting with event listeners from the
mListeners array. This
leads to a potentially exploitable crash.
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.