Launchpad.net

CVE 2011-0061

Buffer overflow in Mozilla Firefox 3.6.x before 3.6.14, Thunderbird before 3.1.8, and SeaMonkey before 2.0.12 might allow remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted JPEG image.

See the CVE page on Mitre.org for more details.