Mozilla security researcher moz_bug_r_a4 reported that the XPCOM utility XPCVariant::VariantDataToJS unwrapped doubly-wrapped objects before returning them to chrome callers. This could result in chrome privileged code calling methods on an object which had previously been created or modified by web content, potentially executing malicious JavaScript code with chrome privileges.
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 5 Via RHSA-2009:1530 https://rhn.redhat.com/errata/RHSA-2009-1530.html
blam-1.8.5-15.fc11, chmsee-1.0.1-12.fc11, epiphany-2.26.3-5.fc11, epiphany-extensions-2.26.1-7.fc11, evolution-rss-0.1.4-5.fc11, firefox-3.5.4-1.fc11, galeon-2.0.7-17.fc11, gnome-python2-extras-2.25.3-8.fc11, gnome-web-photo-0.7-7.fc11, google-gadgets-0.11.1-2.fc11, hulahop-0.4.9-9.fc11, kazehakase-0.5.8-2.fc11.1, Miro-2.5.2-5.fc11, monodevelop-2.0-6.fc11, mozvoikko-0.9.7-0.8.rc1.fc11, pcmanx-gtk2-0.3.8-9.fc11, ruby-gnome2-0.19.3-3.fc11, seahorse-plugins-2.26.2-7.fc11, xulrunner-1.9.1.4-1.fc11, yelp-2.26.0-8.fc11, eclipse-3.4.2-17.fc11, perl-Gtk2-MozEmbed-0.08-6.fc11.6 has been pushed to the Fedora 11 stable repository. If problems still persist, please make note of it in this bug report.
blam-1.8.5-15.fc10, epiphany-2.24.3-11.fc10, epiphany-extensions-2.24.3-6.fc10, evolution-rss-0.1.4-5.fc10, firefox-3.0.15-1.fc10, galeon-2.0.7-15.fc10, gecko-sharp2-0.13-13.fc10, gnome-python2-extras-2.19.1-35.fc10, gnome-web-photo-0.3-23.fc10, google-gadgets-0.10.5-11.fc10, kazehakase-0.5.6-4.fc10.7, Miro-2.0.5-5.fc10, mozvoikko-0.9.5-15.fc10, mugshot-1.2.2-14.fc10, pcmanx-gtk2-0.3.8-14.fc10, perl-Gtk2-MozEmbed-0.08-6.fc10.6, ruby-gnome2-0.19.3-3.fc10, xulrunner-1.9.0.15-1.fc10, yelp-2.24.0-14.fc10 has been pushed to the Fedora 10 stable repository. If problems still persist, please make note of it in this bug report.