CVE-2018-5143

Las URL que utilizan "javascript:" eliminan el protocolo cuando se pega en la barra de direcciones para proteger a los usuarios de ataques Cross-Site Scripting (XSS), pero si hay un carácter de tabulación incrustado en la URL "javascript:", el protocolo no se elimina y el script se ejecutará. Esto podría permitir que se realice ingeniería social sobre los usuarios para ejecutar un ataque Cross-Site Scripting (XSS) contra ellos mismos. Esta vulnerabilidad afecta a las versiones anteriores a la 59 de Firefox.

USN-3596-1 fixed vulnerabilities in Firefox. The update caused an issue where it was not possible to customize the toolbars when running Firefox in Unity. 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 or opening new tabs, escape the sandbox, bypass same-origin restrictions, obtain sensitive information, confuse the user with misleading permission requests, or execute arbitrary code. It was discovered that the fetch API could incorrectly return cached copies of no-store/no-cache resources in some circumstances. A local attacker could potentially exploit this to obtain sensitive information in environments where multiple users share a common profile. Various other issues were also addressed.