Mozilla Thunderbird is vulnerable to denial of service (DoS). A flaw was found in the way Thunderbird handled the HTML iframe tag. An HTML mail message with an iframe tag containing a specially-crafted source address could trigger this flaw, possibly leading to arbitrary code execution with the privileges of the user running Thunderbird.
downloads.avaya.com/css/P8/documents/100134543
downloads.avaya.com/css/P8/documents/100144158
www.debian.org/security/2011/dsa-2227
www.debian.org/security/2011/dsa-2228
www.debian.org/security/2011/dsa-2235
www.mandriva.com/security/advisories?name=MDVSA-2011:079
www.mandriva.com/security/advisories?name=MDVSA-2011:080
www.mozilla.org/security/announce/2011/mfsa2011-12.html
www.securityfocus.com/bid/47647
access.redhat.com/errata/RHSA-2011:0475
access.redhat.com/security/updates/classification/#critical
bugzilla.mozilla.org/show_bug.cgi?id=635977
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14086