The International Domain Name (IDN) support in Firefox 1.0, Camino .8.5, and Mozilla before 1.7.6 allows remote attackers to spoof domain names using punycode encoded domain names that are decoded in URLs and SSL certificates in a way that uses homograph characters from other character sets, which facilitates phishing attacks.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11229
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100029
https://exchange.xforce.ibmcloud.com/vulnerabilities/19236
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-0234
http://www.shmoo.com/idn/homograph.txt
http://www.securityfocus.com/bid/12461
http://www.redhat.com/support/errata/RHSA-2005-384.html
http://www.redhat.com/support/errata/RHSA-2005-176.html
http://www.novell.com/linux/security/advisories/2005_16_mozilla_firefox.html
http://www.mozilla.org/security/announce/mfsa2005-29.html
http://www.gentoo.org/security/en/glsa/glsa-200503-30.xml
http://www.gentoo.org/security/en/glsa/glsa-200503-10.xml
http://marc.info/?l=bugtraq&m=110782704923280&w=2
http://lists.grok.org.uk/pipermail/full-disclosure/2005-February/031459.html