Security researcher Attila Suszter reported that when a page contains a
Flash object which presents a slow script dialog, and the page is navigated
while the dialog is still visible to the user, the Flash plugin is unloaded
resulting in a crash due to a call to the deleted object. This crash could
potentially be used by an attacker to run arbitrary code on a victim's
This issue has been addressed in following products:
Red Hat Enterprise Linux 5
Red Hat Enterprise Linux 4
Via RHSA-2009:1162 https://rhn.redhat.com/errata/RHSA-2009-1162.html
MITRE's CVE-2009-2467 entry:
Mozilla Firefox before 3.0.12 and 3.5 before 3.5.1 allows remote
attackers to cause a denial of service (application crash) or possibly
execute arbitrary code via vectors involving a Flash object, a slow
script dialog, and the unloading of the Flash plugin, which triggers
attempted use of a deleted object.
devhelp-0.22-10.fc10, blam-1.8.5-12.fc10, gecko-sharp2-0.13-10.fc10, galeon-2.0.7-12.fc10, gnome-python2-extras-2.19.1-32.fc10, evolution-rss-0.1.2-8.fc10, gnome-web-photo-0.3-20.fc10, mozvoikko-0.9.5-12.fc10, google-gadgets-0.10.5-8.fc10, kazehakase-0.5.6-4.fc10.4, mugshot-1.2.2-11.fc10, yelp-2.24.0-11.fc10, ruby-gnome2-0.19.0-3.fc10.1, Miro-2.0.5-2.fc10, epiphany-2.24.3-8.fc10, pcmanx-gtk2-0.3.8-11.fc10, xulrunner-220.127.116.11-1.fc10, firefox-3.0.12-1.fc10 has been pushed to the Fedora 10 stable repository. If problems still persist, please make note of it in this bug report.