Mozilla Firefox before 31.0 and Thunderbird before 31.0 allow remote attackers to cause a denial of service (X.509 certificate parsing outage) via a crafted certificate that does not use UTF-8 character encoding in a required context, a different vulnerability than CVE-2014-1559.
https://security.gentoo.org/glsa/201504-01
https://bugzilla.mozilla.org/show_bug.cgi?id=1015973
http://www.securitytracker.com/id/1030620
http://www.securitytracker.com/id/1030619
http://www.mozilla.org/security/announce/2014/mfsa2014-65.html