Mozilla developers and community members 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.
Yongqian Li reported that a document can be constructed whose internal
representation contains double copies of certain elements leading to
potentially unsafe memory conditions. John Senchak also separately reported a double frame construction bug which could also be used to crash the browser and run arbitrary code.
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-2009-2465 entry:
Mozilla Firefox before 3.0.12 and Thunderbird allow remote attackers
to cause a denial of service (memory corruption and application crash)
or execute arbitrary code via vectors involving double frame
construction, related to (1) nsHTMLContentSink.cpp, (2)
nsXMLContentSink.cpp, and (3) nsPresShell.cpp, and the
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-184.108.40.206-1.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.