The host is installed with Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11 or SeaMonkey before 2.14 and is prone to use-after-free vulnerability. A flaw is present in the applications, which fail to handle memory. Successful exploitation allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.