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Mozilla Firefox "jar:" Protocol Handling Cross-Site Scripting Security Issue

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Release Date:  2007-11-09    Last Update:  2008-01-03    Views:  31,700

Secunia Advisory SA27605

Where:

From remote

Impact:

Cross Site Scripting

Solution Status:

Vendor Patch

CVE Reference(s):

Description


A security issue has been reported in Mozilla Firefox, which can be exploited by malicious people to conduct cross-site scripting attacks.

The problem is that the "jar:" protocol handler does not validate the MIME type of the contents of an archive, which are then executed in the context of the site hosting the archive. This can be exploited to conduct cross-site scripting attacks on sites that allow a user to upload certain files (e.g. .zip, .png, .doc, .odt, .txt) or on sites with an open redirect.


Solution:
Update to version 2.0.0.10.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Reported by Jesse Ruderman in a Bugzilla entry.

Independently discovered by pdp.

Open redirect vector reported by Fernando Muñoz.

Original Advisory:
Mozilla:
https://bugzilla.mozilla.org/show_bug.cgi?id=369814
http://www.mozilla.org/security/announce/2007/mfsa2007-37.html

GNUCITIZEN:
http://www.gnucitizen.org/blog/web-mayhem-firefoxs-jar-protocol-issues

beford.org:
http://blog.beford.org/?p=8

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 "jar:" Protocol Handling Cross-Site Scripting Security Issue

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