Mozilla Thunderbird before 2.0.0.22 and SeaMonkey before 1.1.17 allow remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a multipart/alternative e-mail message containing a text/enhanced part that triggers access to an incorrect object type.
https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00504.html
https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00444.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9994
https://exchange.xforce.ibmcloud.com/vulnerabilities/51315
https://bugzilla.mozilla.org/show_bug.cgi?id=495057
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.454275
http://www.securityfocus.com/bid/35461
http://www.redhat.com/support/errata/RHSA-2009-1134.html
http://www.mozilla.org/security/announce/2009/mfsa2009-33.html
http://www.mandriva.com/security/advisories?name=MDVSA-2009:141
http://www.debian.org/security/2009/dsa-1830
http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.425408
http://securitytracker.com/id?1022433
http://secunia.com/advisories/35882
http://secunia.com/advisories/35633