Mozilla Firefox before 3.0.13, and 3.5.x before 3.5.2, allows remote attackers to spoof the address bar, and possibly conduct phishing attacks, via a crafted web page that calls window.open with an invalid character in the URL, makes document.write calls to the resulting object, and then calls the stop method during the loading of the error page.
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00261.html
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00198.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9686
https://bugzilla.mozilla.org/show_bug.cgi?id=451898
http://www.vupen.com/english/advisories/2009/2142
http://www.vupen.com/english/advisories/2009/2006
http://www.securitytracker.com/id?1022603
http://www.securityfocus.com/archive/1/505265
http://www.redhat.com/support/errata/RHSA-2009-1432.html
http://www.redhat.com/support/errata/RHSA-2009-1431.html
http://www.redhat.com/support/errata/RHSA-2009-1430.html
http://www.mozilla.org/security/announce/2009/mfsa2009-44.html
http://www.debian.org/security/2009/dsa-1873
http://sunsolve.sun.com/search/document.do?assetkey=1-66-266148-1
http://secunia.com/advisories/36670
http://secunia.com/advisories/36669
http://secunia.com/advisories/36435
http://secunia.com/advisories/36141
http://secunia.com/advisories/36126
http://secunia.com/advisories/36001
http://es.geocities.com/jplopezy/firefoxspoofing.html
http://blog.mozilla.com/security/2009/07/28/url-bar-spoofing-vulnerability/