If WebRTC permission is requested from documents with data: or blob: URLs, the permission notifications do not properly display the originating domain. The notification states "Unknown origin" as the requestee, leading to user confusion about which site is asking for this permission. This vulnerability affects Firefox < 66.
Si se solicita el permiso WebRTC de documentos con datos: o BLOB: URL, las notificaciones de permisos no muestran correctamente el dominio de origen. La notificación indica "Unknown origin" como el solicitante, lo que conduce a la confusión del usuario acerca de qué sitio está pidiendo este permiso. Esta vulnerabilidad afecta a Firefox hasta las versiones anteriores la 66.
USN-3918-1 fixed vulnerabilities in Firefox. The update caused web compatibility and performance issues with some websites. 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 cause a denial of service via application crash, denial of service via successive FTP authorization prompts or modal alerts, trick the user with confusing permission request prompts, obtain sensitive information, conduct social engineering attacks, or execute arbitrary code. A mechanism was discovered that removes some bounds checking for string, array, or typed array accesses if Spectre mitigations have been disabled. If a user were tricked in to opening a specially crafted website with Spectre mitigations disabled, an attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. It was discovered that Upgrade-Insecure-Requests was incorrectly enforced for same-origin navigation. An attacker could potentially exploit this to conduct man-in-the-middle attacks. Various other issues were also addressed.
