Mozilla Firefox 1.5.0.2, when designMode is enabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code via certain Javascript that is not properly handled by the contentWindow.focus method in an iframe, which causes a reference to a deleted controller context object. NOTE: this was originally claimed to be a buffer overflow in (1) js320.dll and (2) xpcom_core.dll, but the vendor disputes this claim.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1790
https://exchange.xforce.ibmcloud.com/vulnerabilities/25994
http://www.vupen.com/english/advisories/2008/0083
http://www.vupen.com/english/advisories/2006/3748
http://www.vupen.com/english/advisories/2006/1922
http://www.vupen.com/english/advisories/2006/1614
http://www.securityfocus.com/archive/1/446658/100/200/threaded
http://www.securityfocus.com/archive/1/434524/100/0/threaded
http://www.securityfocus.com/archive/1/431878/100/0/threaded
http://www.mozilla.org/security/announce/2006/mfsa2006-30.html
http://www.kb.cert.org/vuls/id/866300
http://www.gentoo.org/security/en/glsa/glsa-200605-06.xml
http://www.debian.org/security/2006/dsa-1055
http://www.debian.org/security/2006/dsa-1053
http://securityreason.com/securityalert/780
http://secunia.com/advisories/22066
http://secunia.com/advisories/20214
http://secunia.com/advisories/20070
http://secunia.com/advisories/20019