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Internet Explorer CSS Import Information Disclosure

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Release Date:  2005-12-08    Last Update:  2006-06-13    Views:  27,222

Secunia Advisory SA17564

Where:

From remote

Impact:

Cross Site Scripting, Exposure of sensitive information

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Matan Gillon has discovered a vulnerability in Microsoft Internet Explorer, which can be exploited by malicious people to disclose potentially sensitive information.

The vulnerability is caused due to an error where the content of imported CSS (Cascading Style Sheets) from other domains is not properly protected from being read via the "cssText" DHTML property.

This can be exploited by a malicious web site to disclose parts of the contents of certain documents served from another web site (e.g. HTML documents with a certain structure, which can be parsed by the internal CSS parser) by loading the document via the "@import" directive and accessing the content of it via JavaScript.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Matan Gillon

Original Advisory:
MS06-021 (KB916281):
http://www.microsoft.com/technet/security/Bulletin/MS06-021.mspx

Matan Gillon:
http://www.hacker.co.il/security/ie/css_import.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: Internet Explorer CSS Import Information Disclosure

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