Jakob Balle and Carsten Eiram of Secunia Research reported a race condition in NPObjWrapper_NewResolve when accessing the properties of a NPObject, a wrapped JSObject. Balle and Eiram demonstrated that this condition could be reached by navigating away from a web page during the loading of a Java applet. Under such conditions the Java object would be destroyed but later called into resulting in a free memory read. An attacker could potentially write to the freed memory before it is reused and run arbitrary code on the victim's computer.
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 4 Via RHSA-2009:1095 https://rhn.redhat.com/errata/RHSA-2009-1095.html
firefox-3.0.11-1.fc10, xulrunner-1.9.0.11-1.fc10, epiphany-2.24.3-7.fc10, epiphany-extensions-2.24.3-2.fc10, blam-1.8.5-11.fc10, devhelp-0.22-9.fc10, galeon-2.0.7-11.fc10, gecko-sharp2-0.13-9.fc10, gnome-python2-extras-2.19.1-31.fc10, gnome-web-photo-0.3-19.fc10, google-gadgets-0.10.5-7.fc10, kazehakase-0.5.6-4.fc10.3, Miro-2.0.3-5.fc10, mozvoikko-0.9.5-11.fc10, mugshot-1.2.2-10.fc10, pcmanx-gtk2-0.3.8-10.fc10, perl-Gtk2-MozEmbed-0.08-6.fc10.2, ruby-gnome2-0.18.1-5.fc10.3, yelp-2.24.0-10.fc10 has been pushed to the Fedora 10 stable repository. If problems still persist, please make note of it in this bug report.
firefox-3.0.11-1.fc9, xulrunner-1.9.0.11-1.fc9, epiphany-2.22.2-12.fc9, epiphany-extensions-2.22.1-12.fc9, blam-1.8.5-10.fc9.1, chmsee-1.0.1-13.fc9, devhelp-0.19.1-13.fc9, evolution-rss-0.1.0-12.fc9, galeon-2.0.7-11.fc9, gnome-python2-extras-2.19.1-28.fc9, gnome-web-photo-0.3-22.fc9, google-gadgets-0.10.5-7.fc9, gtkmozembedmm-1.4.2.cvs20060817-30.fc9, kazehakase-0.5.6-4.fc9.3, Miro-2.0.3-5.fc9, mozvoikko-0.9.5-11.fc9, mugshot-1.2.2-10.fc9, ruby-gnome2-0.17.0-10.fc9, totem-2.23.2-17.fc9, yelp-2.22.1-13.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.