Firefox before 1.0.5 and Mozilla before 1.7.9 does not properly clone base objects, which allows remote attackers to execute arbitrary code by navigating the prototype chain to reach a privileged object.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A817
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A550
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11751
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100003
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=160202
http://www.vupen.com/english/advisories/2005/1075
http://www.securityfocus.com/bid/14242
http://www.redhat.com/support/errata/RHSA-2005-601.html
http://www.redhat.com/support/errata/RHSA-2005-587.html
http://www.redhat.com/support/errata/RHSA-2005-586.html
http://www.novell.com/linux/security/advisories/2006_04_25.html
http://www.novell.com/linux/security/advisories/2005_45_mozilla.html
http://www.novell.com/linux/security/advisories/2005_18_sr.html
http://www.mozilla.org/security/announce/mfsa2005-56.html
http://www.kb.cert.org/vuls/id/652366
http://www.debian.org/security/2005/dsa-810
http://www.ciac.org/ciac/bulletins/p-252.shtml
http://securitytracker.com/id?1014470
http://secunia.com/advisories/19823