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Mozilla Foundation Security Advisory 2013-102

Title: Use-after-free in HTML document templates
Impact: Critical
Announced: October 29, 2013
Reporter: Abhishek Arya
Products: Firefox, Thunderbird, Seamonkey

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


Security researcher Abhishek Arya (Inferno) of the Google Chrome Security Team used the Address Sanitizer tool to discover a user-after-free when interacting with HTML document templates. This leads to 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.