Mozilla Crash caused by corrupted JPEG image (MFSA 2011-21)

Mozilla Firefox before 3.6.18 and 4.x through 4.0.1, Thunderbird before 3.1.11, and SeaMonkey through 2.0.14 allow remote attackers to cause a denial of service memory corruption and application crash or possibly execute arbitrary code via a multipart/x-mixed-replace image...

Mozilla crash caused by corrupted JPEG image (MFSA 2011-09)

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...