Mozilla Firefox before 3.5.12 and 3.6.x before 3.6.9, Thunderbird before 3.0.7 and 3.1.x before 3.1.3, and SeaMonkey before 2.0.7 on Mac OS X allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via a crafted font in a data: URL.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11550
https://exchange.xforce.ibmcloud.com/vulnerabilities/61663
https://bugzilla.mozilla.org/show_bug.cgi?id=583520
http://www.vupen.com/english/advisories/2010/2323
http://www.mozilla.org/security/announce/2010/mfsa2010-58.html
http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00002.html