Mozilla Firefox before 3.5.9 and 3.6.x before 3.6.2, and SeaMonkey before 2.0.4, executes a mail application in situations where an IMG element has a SRC attribute that is a redirect to a mailto: URL, which allows remote attackers to cause a denial of service (excessive application launches) via an HTML document with many images.
http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html
https://bugzilla.mozilla.org/show_bug.cgi?id=452093
http://secunia.com/advisories/39136
http://secunia.com/advisories/39397
https://exchange.xforce.ibmcloud.com/vulnerabilities/57395
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6776
http://ubuntu.com/usn/usn-921-1
http://www.mandriva.com/security/advisories?name=MDVSA-2010:070
http://www.mozilla.org/security/announce/2010/mfsa2010-23.html