Mozilla Firefox 1.5, Thunderbird 1.5 if Javascript is enabled in mail, and SeaMonkey before 1.0 might allow remote attackers to execute arbitrary code via the QueryInterface method of the built-in Location and Navigator objects, which leads to memory corruption.
secunia.com/advisories/18700
secunia.com/advisories/18704
secunia.com/advisories/22065
securitytracker.com/id?1015570
www.kb.cert.org/vuls/id/759273
www.mozilla.org/security/announce/2006/mfsa2006-04.html
www.securityfocus.com/archive/1/446657/100/200/threaded
www.securityfocus.com/bid/16476
www.us-cert.gov/cas/techalerts/TA06-038A.html
www.vupen.com/english/advisories/2006/0413
www.vupen.com/english/advisories/2006/3749
bugzilla.mozilla.org/show_bug.cgi?id=319296
exchange.xforce.ibmcloud.com/vulnerabilities/24433
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1562