An arbitrary code execution flaw was found in Mozilla products via the nsTreeSelection element. If a user executes malformed content, it could be possible to execute arbitrary code with the permissions of the user.
This is now public: http://www.mozilla.org/security/announce/2011/mfsa2011-13.html
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Via RHSA-2011:0473 https://rhn.redhat.com/errata/RHSA-2011-0473.html
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2011:0475 https://rhn.redhat.com/errata/RHSA-2011-0475.html
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 5 Via RHSA-2011:0474 https://rhn.redhat.com/errata/RHSA-2011-0474.html
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 4 Via RHSA-2011:0471 https://rhn.redhat.com/errata/RHSA-2011-0471.html