Mozilla: Use-after-free, buffer overflow, and out of bounds read issues found using Address Sanitizer (MFSA 2012-85)

The IsCSSWordSpacingSpace function in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code or cause a denial of service out-of-bounds read via unspecifi...