The function allocation code (js_NewFunction in jsfun.c) in Firefox 1.5 allows attackers to cause a denial of service (memory corruption) and possibly execute arbitrary code via user-defined methods that trigger garbage collection in a way that operates on freed objects.
secunia.com/advisories/18700
secunia.com/advisories/18704
secunia.com/advisories/19862
secunia.com/advisories/19863
secunia.com/advisories/19902
secunia.com/advisories/19941
secunia.com/advisories/21622
secunia.com/advisories/22065
securitytracker.com/id?1015570
sunsolve.sun.com/search/document.do?assetkey=1-26-102550-1
sunsolve.sun.com/search/document.do?assetkey=1-26-228526-1
support.avaya.com/elmodocs2/security/ASA-2006-205.htm
www.debian.org/security/2006/dsa-1044
www.debian.org/security/2006/dsa-1046
www.debian.org/security/2006/dsa-1051
www.gentoo.org/security/en/glsa/glsa-200604-18.xml
www.mozilla.org/security/announce/2006/mfsa2006-01.html
www.securityfocus.com/archive/1/438730/100/0/threaded
www.securityfocus.com/archive/1/446657/100/200/threaded
www.securityfocus.com/bid/16476
www.vupen.com/english/advisories/2006/0413
www.vupen.com/english/advisories/2006/3391
www.vupen.com/english/advisories/2006/3749
bugzilla.mozilla.org/show_bug.cgi?id=322045
exchange.xforce.ibmcloud.com/vulnerabilities/24430
exchange.xforce.ibmcloud.com/vulnerabilities/42654
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1494