nsHTMLContentSink.cpp in Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7.13, and SeaMonkey before 1.0 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown vectors involving a "particular sequence of HTML tags" that leads to memory corruption.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1848
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11704
https://exchange.xforce.ibmcloud.com/vulnerabilities/25819
http://www.zerodayinitiative.com/advisories/ZDI-06-009.html
http://www.vupen.com/english/advisories/2006/3391
http://www.vupen.com/english/advisories/2006/1356
http://www.us-cert.gov/cas/techalerts/TA06-107A.html
http://www.securityfocus.com/bid/17516
http://www.securityfocus.com/archive/1/438730/100/0/threaded
http://www.securityfocus.com/archive/1/436338/100/0/threaded
http://www.securityfocus.com/archive/1/436296/100/0/threaded
http://www.securityfocus.com/archive/1/434524/100/0/threaded
http://www.securityfocus.com/archive/1/431126/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2006-0330.html
http://www.redhat.com/support/errata/RHSA-2006-0329.html
http://www.redhat.com/support/errata/RHSA-2006-0328.html
http://www.redhat.com/archives/fedora-announce-list/2006-April/msg00154.html
http://www.redhat.com/archives/fedora-announce-list/2006-April/msg00153.html
http://www.mozilla.org/security/announce/2006/mfsa2006-18.html
http://www.mandriva.com/security/advisories?name=MDKSA-2006:078
http://www.mandriva.com/security/advisories?name=MDKSA-2006:076
http://www.mandriva.com/security/advisories?name=MDKSA-2006:075
http://www.kb.cert.org/vuls/id/736934
http://www.gentoo.org/security/en/glsa/glsa-200605-09.xml
http://www.gentoo.org/security/en/glsa/glsa-200604-18.xml
http://www.gentoo.org/security/en/glsa/glsa-200604-12.xml
http://www.debian.org/security/2006/dsa-1051
http://www.debian.org/security/2006/dsa-1046
http://www.debian.org/security/2006/dsa-1044
http://support.avaya.com/elmodocs2/security/ASA-2006-205.htm
http://securityreason.com/securityalert/729
http://secunia.com/advisories/21622
http://secunia.com/advisories/21033
http://secunia.com/advisories/20051
http://secunia.com/advisories/19950
http://secunia.com/advisories/19941
http://secunia.com/advisories/19902
http://secunia.com/advisories/19863
http://secunia.com/advisories/19862
http://secunia.com/advisories/19852
http://secunia.com/advisories/19823
http://secunia.com/advisories/19821
http://secunia.com/advisories/19811
http://secunia.com/advisories/19794
http://secunia.com/advisories/19780
http://secunia.com/advisories/19759
http://secunia.com/advisories/19746
http://secunia.com/advisories/19729
http://secunia.com/advisories/19721
http://secunia.com/advisories/19714