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Internet Explorer CSS Import Information Disclosure Advisory Available in Danish 

Secunia Advisory: SA17564  
Release Date: 2005-12-08
Last Update: 2006-06-13

Critical:
Less critical
Impact: Cross Site Scripting
Exposure of sensitive information
Where: From remote
Solution Status: Vendor Patch

Software:Microsoft Internet Explorer 5.01
Microsoft Internet Explorer 6.x

CVE reference:CVE-2005-4089 (Secunia mirror)

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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.

Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, using the Network Software Inspector.

Solution:
Apply patches.

Internet Explorer 5.01 SP4 on Windows 2000 SP4:
http://www.microsoft.com/downloads/de...=91A997DE-BAE4-4AC7-912D-79EF8ABAEF4F

Internet Explorer 6 SP1 on Windows 2000 SP4 or Windows XP SP1:
http://www.microsoft.com/downloads/de...=0EB17A41-FB43-413B-A5CC-41E1F3DEDE4F

Internet Explorer 6 for Windows XP SP2:
http://www.microsoft.com/downloads/de...=85CABE87-C4A0-4F80-BD1C-210E23FD8D81

Internet Explorer 6 for Windows Server 2003 and Windows Server 2003 SP1:
http://www.microsoft.com/downloads/de...=CCE7C875-C9A4-4C3D-A37B-946EE5E781E7

Internet Explorer 6 for Windows Server 2003 for Itanium-based systems (with or without SP1):
http://www.microsoft.com/downloads/de...=C8E4CFB6-1350-4AAE-B681-EE2ECAB41118

Internet Explorer 6 for Windows Server 2003 x64 Edition:
http://www.microsoft.com/downloads/de...=1C7D5C6D-DDCF-485D-A1E3-60E55334FD74

Internet Explorer 6 for Windows XP Professional x64 Edition:
http://www.microsoft.com/downloads/de...=F91791AC-8185-4346-AA66-89F74D4B5EA7

Internet Explorer 6 SP1 on Windows 98, Windows 98 SE, or Windows Me:
Patches are available from the Windows Update web site.

Provided and/or discovered by:
Matan Gillon

Changelog:
2006-06-13: Added additional information from Microsoft.

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

Other References:
KB article discussing known issues when installing the update:
http://support.microsoft.com/kb/916281



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

135 Related Secunia Security Advisories, displaying 10

1. Internet Explorer MHTML Protocol Handler Cross-Domain Information Disclosure
2. Internet Explorer Multiple Vulnerabilities
3. Internet Explorer 6 Window "location" Handling Vulnerability
4. Internet Explorer "substringData()" Memory Corruption Vulnerability
5. Internet Explorer "Print Table of Links" Cross-Zone Scripting
6. Internet Explorer HTTP Request Smuggling/Splitting Vulnerabilities
7. Internet Explorer FTP Command Injection Vulnerability
8. Microsoft Internet Explorer Multiple Vulnerabilities
9. Internet Explorer Multiple Code Execution Vulnerabilities
10. Microsoft Web Proxy Auto-Discovery Feature Security Issue

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