The JavaScript engine in Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to (1) js_LeaveSharpObject, (2) ParseXMLSource, and (3) a certain assertion in jsinterp.c; and other vectors.
http://rhn.redhat.com/errata/RHSA-2009-1096.html
https://bugzilla.mozilla.org/show_bug.cgi?id=369696
https://bugzilla.mozilla.org/show_bug.cgi?id=426520
https://bugzilla.mozilla.org/show_bug.cgi?id=427196
https://bugzilla.mozilla.org/show_bug.cgi?id=487204
https://bugzilla.redhat.com/show_bug.cgi?id=503570
http://secunia.com/advisories/35331
http://secunia.com/advisories/35415
http://secunia.com/advisories/35428
http://secunia.com/advisories/35431
http://secunia.com/advisories/35439
http://secunia.com/advisories/35440
http://secunia.com/advisories/35468
http://secunia.com/advisories/35536
http://secunia.com/advisories/35561
http://secunia.com/advisories/35602
http://securitytracker.com/id?1022376
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11487
https://rhn.redhat.com/errata/RHSA-2009-1095.html
http://sunsolve.sun.com/search/document.do?assetkey=1-26-265068-1
http://sunsolve.sun.com/search/document.do?assetkey=1-77-1020800.1-1
https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00574.html
https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00657.html
http://www.debian.org/security/2009/dsa-1820
http://www.mandriva.com/security/advisories?name=MDVSA-2009:141
http://www.mozilla.org/security/announce/2009/mfsa2009-24.html
http://www.redhat.com/support/errata/RHSA-2009-1125.html
http://www.redhat.com/support/errata/RHSA-2009-1126.html
http://www.securitytracker.com/id?1022397
http://www.ubuntu.com/usn/usn-782-1