Use-after-free vulnerability in the nsHTMLCSSUtils::CreateCSSPropertyTxn
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 (heap memory corruption) via unspecified vectors.