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Security researcher regenrecht reported via TippingPoint's Zero Day Initiative an integer overflow vulnerability in the implementation of the XUL <tree> element's selection attribute. When the size of a new selection is sufficiently large the integer used in calculating the length of the selection can overflow, resulting in a bogus range being marked selected. When adjustSelection is then called on the bogus range the range is deleted leaving dangling references to the ranges which could be used by an attacker to call into deleted memory and run arbitrary code on a victim's computer.
This is now public: http://www.mozilla.org/security/announce/2010/mfsa2010-40.html
This issue has been addressed in following products: Red Hat Enterprise Linux 3 Red Hat Enterprise Linux 4 Via RHSA-2010:0546 https://rhn.redhat.com/errata/RHSA-2010-0546.html
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 5 Via RHSA-2010:0547 https://rhn.redhat.com/errata/RHSA-2010-0547.html
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
seamonkey-2.0.6-1.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.
xulrunner-1.9.2.7-1.fc13, firefox-3.6.7-1.fc13, mozvoikko-1.0-12.fc13, gnome-web-photo-0.9-10.fc13, perl-Gtk2-MozEmbed-0.08-6.fc13.15, gnome-python2-extras-2.25.3-20.fc13, galeon-2.0.7-30.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.
thunderbird-3.0.6-1.fc12, sunbird-1.0-0.23.20090916hg.fc12 has been pushed to the Fedora 12 stable repository. If problems still persist, please make note of it in this bug report.
seamonkey-2.0.6-1.fc12 has been pushed to the Fedora 12 stable repository. If problems still persist, please make note of it in this bug report.
xulrunner-1.9.1.11-1.fc12, firefox-3.5.11-1.fc12, gnome-web-photo-0.9-8.fc12, mozvoikko-1.0-11.fc12, perl-Gtk2-MozEmbed-0.08-6.fc12.14, gnome-python2-extras-2.25.3-19.fc12, galeon-2.0.7-24.fc12 has been pushed to the Fedora 12 stable repository. If problems still persist, please make note of it in this bug report.
thunderbird-3.1.1-1.fc13, sunbird-1.0-0.26.b2pre.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.