Microsoft Vulnerability Research reported that two plugin instances could interact in a way in which one plugin gets a reference to an object owned by a second plugin and continues to hold that reference after the second plugin is unloaded and its object is destroyed. In these cases, the first plugin would contain a pointer to freed memory which, if accessed, could be used by an attacker to execute arbitrary code on a victim's computer.
This issue is now public: http://www.mozilla.org/security/announce/2010/mfsa2010-28.html
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 3 Via RHSA-2010:0499 https://rhn.redhat.com/errata/RHSA-2010-0499.html
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Via RHSA-2010:0500 https://rhn.redhat.com/errata/RHSA-2010-0500.html
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Via RHSA-2010:0501 https://rhn.redhat.com/errata/RHSA-2010-0501.html
seamonkey-2.0.5-1.fc12 has been submitted as an update for Fedora 12. http://admin.fedoraproject.org/updates/seamonkey-2.0.5-1.fc12
seamonkey-2.0.5-1.fc13 has been submitted as an update for Fedora 13. http://admin.fedoraproject.org/updates/seamonkey-2.0.5-1.fc13
xulrunner-1.9.2.4-1.fc13,firefox-3.6.4-1.fc13,mozvoikko-1.0-11.fc13,gnome-web-photo-0.9-9.fc13,perl-Gtk2-MozEmbed-0.08-6.fc13.14,gnome-python2-extras-2.25.3-19.fc13,galeon-2.0.7-29.fc13 has been submitted as an update for Fedora 13. http://admin.fedoraproject.org/updates/xulrunner-1.9.2.4-1.fc13,firefox-3.6.4-1.fc13,mozvoikko-1.0-11.fc13,gnome-web-photo-0.9-9.fc13,perl-Gtk2-MozEmbed-0.08-6.fc13.14,gnome-python2-extras-2.25.3-19.fc13,galeon-2.0.7-29.fc13
firefox-3.5.10-1.fc12,xulrunner-1.9.1.10-1.fc12,mozvoikko-1.0-10.fc12,gnome-web-photo-0.9-7.fc12,gnome-python2-extras-2.25.3-18.fc12,perl-Gtk2-MozEmbed-0.08-6.fc12.13,galeon-2.0.7-23.fc12 has been submitted as an update for Fedora 12. http://admin.fedoraproject.org/updates/firefox-3.5.10-1.fc12,xulrunner-1.9.1.10-1.fc12,mozvoikko-1.0-10.fc12,gnome-web-photo-0.9-7.fc12,gnome-python2-extras-2.25.3-18.fc12,perl-Gtk2-MozEmbed-0.08-6.fc12.13,galeon-2.0.7-23.fc12
seamonkey-2.0.5-1.fc12 has been pushed to the Fedora 12 stable repository. If problems still persist, please make note of it in this bug report.
xulrunner-1.9.1.10-1.fc12, mozvoikko-1.0-10.fc12, gnome-web-photo-0.9-7.fc12, gnome-python2-extras-2.25.3-18.fc12, perl-Gtk2-MozEmbed-0.08-6.fc12.13, galeon-2.0.7-23.fc12, firefox-3.5.10-1.fc12 has been pushed to the Fedora 12 stable repository. If problems still persist, please make note of it in this bug report.
xulrunner-1.9.2.4-1.fc13, firefox-3.6.4-1.fc13, mozvoikko-1.0-11.fc13, gnome-web-photo-0.9-9.fc13, perl-Gtk2-MozEmbed-0.08-6.fc13.14, gnome-python2-extras-2.25.3-19.fc13, galeon-2.0.7-29.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.
seamonkey-2.0.5-1.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Via RHSA-2010:0545 https://rhn.redhat.com/errata/RHSA-2010-0545.html
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Via RHSA-2010:0544 https://rhn.redhat.com/errata/RHSA-2010-0544.html