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AUSCERT External Security Bulletin Redistribution
ESB-2010.1177
Microsoft WMI Administrative Tools WBEMSingleView.ocx
ActiveX control vulnerability
24 December 2010
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft WMI Administrative Tools
Publisher: Microsoft
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Mitigation
CVE Names: CVE-2010-4588 CVE-2010-3973
Original Bulletin:
http://www.kb.cert.org/vuls/id/725596
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Vulnerability Note VU#725596
Microsoft WMI Administrative Tools WBEMSingleView.ocx ActiveX control
vulnerability
Overview
The ActiveX control, WBEMSingleView.ocx, that is a part of the WMI
Administrative Tools package contains a vulnerability.
I. Description
The AddContextRef() and ReleaseContext() functions of the WMI Object Viewer
control can be passed an object pointer from an attacker that results in
arbitrary code execution. An Internet Explorer user with WBEMSingleView.ocx
installed can be exploited by visiting a malicious web page.
II. Impact
An attacker can execute arbitrary code as the user.
III. Solution
We are currently unaware of a practical solution to this problem.
Disable the WMI Object Viewer ActiveX control in Internet Explorer
The vulnerable ActiveX control can be disabled in Internet Explorer by
setting the kill bit for the following CLSID:
{2745E5F5-D234-11D0-847A-00C04FD7BB08}
More information about how to set the kill bit is available in Microsoft
Support Document 240797. Alternatively, the following text can be saved as a
.REG file and imported to set the kill bit for this control:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{2745E5F5-D234-11D0-847A-00C04FD7BB08}]
"Compatibility Flags"=dword:00000400
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\ActiveX Compatibility\{2745E5F5-D234-11D0-847A-00C04FD7BB08}]
"Compatibility Flags"=dword:00000400
Disable ActiveX
Disabling ActiveX controls in the Internet Zone (or any zone used by an
attacker) appears to prevent exploitation of this and other ActiveX
vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can
be found in the "Securing Your Web Browser" document.
Vendor Information
Vendor Status Date Notified Date Updated
Microsoft Corporation Affected 2010-12-22
References
http://www.cert.org/tech_tips/securing_browser/
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=6430f853-1120-48db-8cc5-f2abdc3ed314
http://support.microsoft.com/kb/240797
http://www.wooyun.org/bugs/wooyun-2010-01006
http://secunia.com/advisories/42693
Credit
This vulnerability was publicly disclosed on WooYun.org.
This document was written by Jared Allar.
Other Information
Date Public: 2010-12-22
Date First Published: 2010-12-22
Date Last Updated: 2010-12-22
CERT Advisory:
CVE-ID(s):
NVD-ID(s):
US-CERT Technical Alerts:
Severity Metric: 3.94
Document Revision: 13
If you have feedback, comments, or additional information about this
vulnerability, please send us email.
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