Heap-based buffer overflow in the UTF8ToNewUnicode function for Firefox before 1.0.1 and Mozilla before 1.7.6 might allow remote attackers to cause a denial of service (crash) or execute arbitrary code via invalid sequences in a UTF8 encoded string that result in a zero length value.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10606
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100043
https://bugzilla.mozilla.org/show_bug.cgi?id=241440
http://www.securityfocus.com/bid/12659
http://www.redhat.com/support/errata/RHSA-2005-176.html
http://www.novell.com/linux/security/advisories/2006_04_25.html
http://www.mozilla.org/security/announce/mfsa2005-15.html
http://www.gentoo.org/security/en/glsa/glsa-200503-30.xml