WebKit in Apple Safari before 4.0.2, as used on iPhone OS before 3.1, iPhone OS before 3.1.1 for iPod touch, and other platforms; KHTML in kdelibs in KDE; QtWebKit (aka Qt toolkit); and possibly other products do not properly handle numeric character references, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted HTML document.
https://www.redhat.com/archives/fedora-package-announce/2009-July/msg01200.html
https://www.redhat.com/archives/fedora-package-announce/2009-July/msg01199.html
https://www.redhat.com/archives/fedora-package-announce/2009-July/msg01196.html
https://www.redhat.com/archives/fedora-package-announce/2009-July/msg01177.html
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00933.html
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00931.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5777
https://bugzilla.redhat.com/show_bug.cgi?id=513813
http://www.vupen.com/english/advisories/2011/0212
http://www.vupen.com/english/advisories/2009/1827
http://www.ubuntu.com/usn/USN-857-1
http://www.ubuntu.com/usn/USN-836-1
http://www.securitytracker.com/id?1022526
http://www.securityfocus.com/bid/35607
http://www.mandriva.com/security/advisories?name=MDVSA-2009:330
http://www.debian.org/security/2009/dsa-1950
http://websvn.kde.org/?view=rev&revision=1002164
http://websvn.kde.org/?view=rev&revision=1002163
http://websvn.kde.org/?view=rev&revision=1002162
http://support.apple.com/kb/HT3860
http://support.apple.com/kb/HT3666
http://secunia.com/advisories/43068
http://secunia.com/advisories/37746
http://secunia.com/advisories/36790
http://secunia.com/advisories/36677
http://secunia.com/advisories/36347
http://secunia.com/advisories/36062
http://secunia.com/advisories/36057
http://secunia.com/advisories/35758
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
http://lists.apple.com/archives/security-announce/2009/Sep/msg00001.html
http://lists.apple.com/archives/security-announce/2009/Jul/msg00000.html