Secunia

A security issue has been reported in Mozilla Firefox and Mozilla Seamonkey, which can be exploited by malicious people to disclose potentially sensitive information.

The security issue is caused due to the browser not properly restricting "resource://" URIs to be loaded into the JavaScript space. Combined with directory traversal due to insufficient filtering of certain character sequences, this can be exploited to disclose e.g. the default security settings.

Note: The directory traversal is fixed in Mozilla Firefox version 2.0.0.4 for Windows. However it is still possible to include files from the installation folder. Also, the directory traversal issue is not fixed for UNIX-like operating systems. Reportedly, this also introduces a new, unspecified input validation flaw.

Solution
Visit trusted sites only.

Provided and/or discovered by
Loading of settings first demonstrated in a Proof of Concept by Sergey Vzloman.

Directory traversal reported in Mozilla bugs by shutdown and Boris Zbarsky.

Changelog
Further details available in Customer Area

Original Advisory
http://ha.ckers.org/blog/20070516/read-firefox-settings-poc/

Mozilla Bug 367428:
https://bugzilla.mozilla.org/show_bug.cgi?id=367428

Mozilla Bug 380994:
https://bugzilla.mozilla.org/show_bug.cgi?id=380994

Deep Links
Links available in Customer Area