Security researcher Nils used the Address Sanitizer to discover a use-after-free problem with the SMIL Animation Controller when interacting with and rendering improperly formed web content. This causes a potentially exploitable crash.

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/mfsa2014-52.html


Acknowledgements:

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