Security researcher Holger Fuhrmannek used the used the Address Sanitizer tool to discover a buffer overflow with the Speex resampler in Web Audio when working with audio content that exceeds expected bounds. This leads to a potentially exploitable crash. 


External Reference:

http://www.mozilla.org/security/announce/2014/mfsa2014-53.html


Acknowledgements:

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

Statement:

This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5 and 6