Mozilla Firefox URI Launching and XUL Error Page Vulnerabilities

Multiple vulnerabilities have been identified in Firefox, which can be exploited by malicious people to bypass certain security restrictions, potentially conduct spoofing attacks, or compromise a user's system.

1. A vulnerability can be exploited to launch e.g. "file" or "chrome:" URIs in Firefox.

2. Input passed to XUL based error pages is not properly sanitised before being returned to a user and can be exploited to e.g. conduct spoofing attacks.

In combination with vulnerability #1 this can be exploited to inject arbitrary script code and execute arbitrary code in "chrome" context, but requires that a specially crafted URI is passed to Firefox and that Firefox is not running.