CVE-2021-23981

Una carga de textura de un Objeto de Búfer de Píxeles podría haber confundido el código WebGL para omitir el enlace del búfer usado para descomprimirlo, resultando en la corrupción de la memoria y una filtración o bloqueo de información potencialmente explotable. Esta vulnerabilidad afecta a Firefox ESR versión 78.9, Firefox versiones anteriores a 87, and Thunderbird versiones anteriores a 78.9.

The Mozilla Foundation Security Advisory describes this issue as: A texture upload of a Pixel Buffer Object could have confused the WebGL code to skip binding the buffer used to unpack it, resulting in memory corruption and a potentially exploitable information leak or crash.

Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, or execute arbitrary code. It was discovered that extensions could open popup windows with control of the window title in some circumstances. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to spook a website and trick the user into providing credentials. Various other issues were also addressed.