Mozilla Foundation Security Advisory 2013-64
Title: Use after free mutating DOM during
Announced: August 6, 2013
Products: Firefox, Seamonkey
Fixed in: Firefox 23.0
Security researcher Nils used the Address Sanitizer to discover a use-after-free problem when the Document Object Model is modified during a SetBody mutation event. This causes 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 in those products.