CVE-2017-7818

Puede ocurrir una vulnerabilidad de uso de memoria previamente liberada cuando se manipulan arrays de elementos ARIA (Accesible Rich Internet Applications) en los contenedores mediante el DOM. Esto resulta en un cierre inesperado explotable. Esta vulnerabilidad afecta a las versiones anteriores a la 56 de Firefox, las versiones anteriores a la 52.4 de Firefox ESR y las versiones anteriores a la 52.4 de Thunderbird.

USN-3435-1 fixed vulnerabilities in Firefox. The update caused the Flash plugin to crash in some circumstances. This update fixes the problem. Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to read uninitialized memory, obtain sensitive information, bypass phishing and malware protection, spoof the origin in modal dialogs, conduct cross-site scripting attacks, cause a denial of service via application crash, or execute arbitrary code. Martin Thomson discovered that NSS incorrectly generated handshake hashes. A remote attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. Multiple security issues were discovered in WebExtensions. If a user were tricked in to installing a specially crafted extension, an attacker could potentially exploit these to download and open non-executable files without interaction, or obtain elevated privileges. Various other issues were also addressed.