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Internet Explorer Information Disclosure and HTA Application Execution
Secunia Advisory: SA20825
Release Date: 2006-06-27
Last Update: 2006-08-08
Popularity: 25,618 views

Critical:
Less critical
Impact: Exposure of sensitive information
System access
Where: From remote
Solution Status: Vendor Patch

OS:Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Server
Microsoft Windows Server 2003 Datacenter Edition
Microsoft Windows Server 2003 Enterprise Edition
Microsoft Windows Server 2003 Standard Edition
Microsoft Windows Server 2003 Web Edition
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional

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CVE reference:CVE-2006-3280
CVE-2006-3281


Description:
Plebo Aesdi Nael has discovered two vulnerabilities in Microsoft Windows, which can be exploited by malicious people to disclose potentially sensitive information and potentially compromise a user's system.

1) An error when handling redirections in Internet Explorer can be exploited to access documents served from another web site via the "object.documentElement.outerHTML" property.

Secunia has constructed a test, which is available at:
http://secunia.com/internet_explorer_information_disclosure_vulnerability_test/

2) An error in Windows Explorer when handling "Drag and Drop" events can be exploited to trick a user into executing a malicious HTA application via directory traversal attacks in the filename.

Successful exploitation requires some user interaction.

Solution:
1) Apply patches (see MS06-042 for details).

2) Apply patches.

Windows 2000 SP4:
http://www.microsoft.com/downloads/de...=38cee83e-b17a-4c08-90ce-fb836b9615ad

Windows XP SP1/SP2:
http://www.microsoft.com/downloads/de...=6ef68858-4c91-47fb-ae34-0be556f10ede

Windows XP Professional x64 Edition:
http://www.microsoft.com/downloads/de...=50935f4e-e383-493e-97c6-599cbb2b87cc

Windows Server 2003 (optionally with SP1):
http://www.microsoft.com/downloads/de...=759435a3-98f9-4115-b52e-d7fa9d024f16

Windows Server 2003 for Itanium-based systems (optionally with SP1):
http://www.microsoft.com/downloads/de...=462131c6-a728-4b3c-94de-85deccc42c3e

Windows Server 2003 x64 Edition:
http://www.microsoft.com/downloads/de...=50eef5c5-861d-4802-85a2-6b0627aafc2a

Provided and/or discovered by:
Plebo Aesdi Nael

Changelog:
2006-06-30: Added CVE references.
2006-08-08: Added additional information from Microsoft. Updated "Solution" section.

Original Advisory:
MS06-045 (KB921398):
http://www.microsoft.com/technet/security/Bulletin/MS06-045.mspx

MS06-042 (KB918899):
http://www.microsoft.com/technet/security/Bulletin/MS06-042.mspx

Plebo Aesdi Nael:
http://lists.grok.org.uk/pipermail/full-disclosure/2006-June/047398.html


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