Using the Address Sanitizer tool, security researcher Atte Kettunen discovered a buffer overflow in the nestegg library when decoding a WebM format video with maliciously formatted headers. This leads to a potentially exploitable crash. External Reference: https://www.mozilla.org/en-US/security/advisories/mfsa2015-105/
Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Atte Kettunen as the original reporter.
This issue has been addressed in the following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 6 Via RHSA-2015:1834 https://rhn.redhat.com/errata/RHSA-2015-1834.html