Using the Address Sanitizer tool, security researcher Atte Kettunen from OUSPG discovered a buffer overflow when making capitalization style changes during CSS parsing. This can cause a crash that is potentially exploitable. External Reference: http://www.mozilla.org/security/announce/2014/mfsa2014-75.html 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 7 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 5 Via RHSA-2014:1635 https://rhn.redhat.com/errata/RHSA-2014-1635.html