Security researcher Jethro Beekman of the University of California, Berkeley reported a crash when the FireOnStateChange event is triggered in some circumstances. This leads to a use-after-free and a potentially exploitable crash when it occurs.

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



External Reference:

http://www.mozilla.org/security/announce/2014/mfsa2014-61.html


Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Jethro Beekman as the original reporter.