CVE-2019-9813

Incorrect handling of __proto__ mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.

Incorrect handling of __proto__ mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.

Un manejo incorrecto de __proto__ mutations puede llevar a confusión de tipo en el código IonMonkey JIT, y puede aprovecharse para la lectura y escritura de memoria arbitraria. Esta vulnerabilidad afecta a Firefox versiones anteriores a 66.0.1, Firefox ESR versiones anteriores a 60.6.1 y Thunderbird versiones anteriores a 60.6.1.