CVE-2019-11720

Algunos caracteres unicode son tratados incorrectamente como espacios en blanco durante el análisis de contenido web en lugar de desencadenar errores de análisis. Esto permite que sea procesado el código malicioso, evadiendo el filtrado de cross-site scripting (XSS). Esta vulnerabilidad afecta a Firefox anteriores a versión 68.

A sandbox escape was discovered in Firefox. If a user were tricked in to installing a malicious language pack, an attacker could exploit this to gain additional privileges. 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 cause a denial of service, obtain sensitive information, bypass same origin restrictions, conduct cross-site scripting attacks, conduct cross-site request forgery attacks, spoof origin attributes, spoof the addressbar contents, bypass safebrowsing protections, or execute arbitrary code. Various other issues were also addressed.