CVE-2016-5261

Desbordamiento de enteros en la clase WebSocketChannel en el subsistema WebSockets en Mozilla Firefox en versiones anteriores a la 48.0 y Firefox ESR en versiones anteriores a la 45.4 permite que los atacantes remotos ejecuten código arbitrario o provoquen una denegación de servicio (corrupción de memoria) mediante paquetes manipulados que desencadenan operaciones de redimensionamiento de búfer incorrectas durante el "buffering".

Gustavo Grieco discovered an out-of-bounds read during XML parsing in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or obtain sensitive information. Toni Huttunen discovered that once a favicon is requested from a site, the remote server can keep the network connection open even after the page is closed. A remote attacker could potentially exploit this to track users, resulting in information disclosure. Various other issues were also addressed.