Mozilla developers and community identified and fixed several memory safety bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these bugs showed evidence of memory corruption under certain circumstances, and we presume that with enough effort at least some of these could be exploited to run arbitrary code. In general these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled, but are potentially a risk in browser or browser-like contexts. Christian Holler and Patrick McManus reported memory safety problems and crashes that affect Firefox ESR 31.3 and Firefox 34. External Reference: http://www.mozilla.org/security/announce/2015/mfsa2015-01.html Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Christian Holler and Patrick McManus as the original reporter.
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 5 Via RHSA-2015:0047 https://rhn.redhat.com/errata/RHSA-2015-0047.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 7 Via RHSA-2015:0046 https://rhn.redhat.com/errata/RHSA-2015-0046.html