Mozilla developers identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be exploited to run arbitrary code. Olli Pettay, Martijn Wargers, Mats Palmgren, Romaxa, Jesse Ruderman, and Gary Kwong reported crashes in the layout engine which affected Firefox 3 only.
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 5 Via RHSA-2009:0436 https://rhn.redhat.com/errata/RHSA-2009-0436.html
xulrunner-1.9.0.9-1.fc9, firefox-3.0.9-1.fc9, epiphany-extensions-2.22.1-10.fc9, epiphany-2.22.2-10.fc9, blam-1.8.5-8.fc9.1, chmsee-1.0.1-11.fc9, devhelp-0.19.1-11.fc9, evolution-rss-0.1.0-10.fc9, galeon-2.0.7-9.fc9, gnome-python2-extras-2.19.1-26.fc9, gnome-web-photo-0.3-20.fc9, google-gadgets-0.10.5-5.fc9, gtkmozembedmm-1.4.2.cvs20060817-28.fc9, kazehakase-0.5.6-4.fc9.1, Miro-2.0.3-3.fc9, mozvoikko-0.9.5-9.fc9, mugshot-1.2.2-8.fc9, ruby-gnome2-0.17.0-8.fc9, totem-2.23.2-14.fc9, yelp-2.22.1-11.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.
xulrunner-1.9.0.9-1.fc10, firefox-3.0.9-1.fc10, epiphany-extensions-2.24.0-7.fc10, epiphany-2.24.3-5.fc10, blam-1.8.5-9.fc10, devhelp-0.22-7.fc10, galeon-2.0.7-9.fc10, gecko-sharp2-0.13-7.fc10, gnome-python2-extras-2.19.1-29.fc10, gnome-web-photo-0.3-17.fc10, google-gadgets-0.10.5-5.fc10, kazehakase-0.5.6-4.fc10.1, Miro-2.0.3-3.fc10, mozvoikko-0.9.5-9.fc10, mugshot-1.2.2-8.fc10, pcmanx-gtk2-0.3.8-8.fc10, perl-Gtk2-MozEmbed-0.08-5.fc10.2, ruby-gnome2-0.18.1-5.fc10.1, yelp-2.24.0-8.fc10 has been pushed to the Fedora 10 stable repository. If problems still persist, please make note of it in this bug report.