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Insecure Library Loading
Moderately critical

Firefox Greasemonkey Extension Disclosure of Sensitive Information

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Release Date:  2005-07-21    Last Update:  2005-09-28    Views:  23,931

Secunia Advisory SA16128

Where:

From remote

Impact:

Exposure of system information, Exposure of sensitive information

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Mark Pilgrim has reported a vulnerability in the Greasemonkey extension for Firefox, which can be exploited by malicious people to disclose various information.

The vulnerability is caused due to certain functions being insecurely exposed and can be exploited by a malicious web site via e.g. the "GM_xmlhttpRequest()" function to disclose the contents of arbitrary local files and list the contents of arbitrary local directories.

Successful exploitation requires that a Greasemonkey script is configured to run on the malicious web site.

The vulnerability has been reported in versions prior to 0.3.5.


Solution:
The vulnerability has been fixed in version 0.3.5 by reducing the functionality.

Provided and/or discovered by:
Mark Pilgrim

Original Advisory:
http://greaseblog.blogspot.com/2005/07/mandatory-greasemonkey-update.html

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: Firefox Greasemonkey Extension Disclosure of Sensitive Information

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