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Insecure Library Loading
Not critical

Mozilla Firefox / Seamonkey "resource://" Information Disclosure

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Release Date:  2007-06-01    Last Update:  2007-06-12    Views:  20,243

Secunia Advisory SA25481

Where:

From remote

Impact:

Exposure of system information, Exposure of sensitive information

Solution Status:

Unpatched

CVE Reference(s):

Description


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.

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 to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Mozilla Firefox / Seamonkey "resource://" Information Disclosure

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