Mozilla community member Ms2ger discovered that some DOMSVGZoomEvent functions are used without being properly initialized, causing unitialized memory to be used when they are called. This can lead to a potentially exploitable crash. 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. External Reference: http://www.mozilla.org/security/announce/2013/mfsa2013-47.html Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Ms2ger as the original reporter.
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2013:0821 https://rhn.redhat.com/errata/RHSA-2013-0821.html
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2013:0820 https://rhn.redhat.com/errata/RHSA-2013-0820.html