Mozilla Firefox before 3.0.6 and SeaMonkey do not block links to the (1) about:plugins and (2) about:config URIs from .desktop files, which allows user-assisted remote attackers to bypass the Same Origin Policy and execute arbitrary code with chrome privileges via vectors involving the URL field in a Desktop Entry section of a .desktop file, related to representation of about: URIs as jar:file:// URIs. NOTE: this issue exists because of an incomplete fix for CVE-2008-4582.
https://www.redhat.com/archives/fedora-package-announce/2009-February/msg00240.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9922
https://bugzilla.mozilla.org/show_bug.cgi?id=460425
http://www.vupen.com/english/advisories/2009/0313
http://www.securitytracker.com/id?1021666
http://www.securityfocus.com/bid/33598
http://www.mozilla.org/security/announce/2009/mfsa2009-04.html
http://www.mandriva.com/security/advisories?name=MDVSA-2009:044
http://support.avaya.com/elmodocs2/security/ASA-2009-040.htm
http://secunia.com/advisories/33846
http://secunia.com/advisories/33841
http://secunia.com/advisories/33831
http://secunia.com/advisories/33809
http://secunia.com/advisories/33799
http://rhn.redhat.com/errata/RHSA-2009-0256.html
http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00001.html