CVE-2018-12387

Vulnerabilidad por la cual el compilador JIT de JavaScript inserta Array.prototype.push con múltiples argumentos que resultan en que el puntero de la pila está fuera de su sitio por 8 bytes tras un bailout. Esto filtra una dirección de memoria a la función llamante que puede emplearse como parte de un exploit dentro del proceso de contenido en sandbox. La vulnerabilidad afecta a Firefox ESR en versiones anteriores a la 60.2.2 y Firefox en versiones anteriores a la 62.0.3.

A crash was discovered in TransportSecurityInfo used for SSL, which could be triggered by data stored in the local cache directory. An attacker could potentially exploit this in combination with another vulnerability that allowed them to write data to the cache, to execute arbitrary code. A type confusion bug was discovered in JavaScript. If a user were tricked in to opening a specially crafted website, an attacker could exploit this to cause a denial of service, or execute arbitrary code. Various other issues were also addressed.