Security researcher regenrecht reported, via TippingPoint's Zero Day Initiative, a use-after-free during text layout when interacting with the setting of text direction. This results in a use-after-free which can lead to arbitrary code execution. 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/mfsa2014-72.html Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges regenrecht as the original reporter.
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2014:1145 https://rhn.redhat.com/errata/RHSA-2014-1145.html
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 5 Via RHSA-2014:1144 https://rhn.redhat.com/errata/RHSA-2014-1144.html