Vulnerability Note VU#461321

HP Virtual Rooms ActiveX control fails to restrict access to dangerous methods

Overview

The HP Virtual Rooms ActiveX control contains methods that can be used to download and execute arbitrary code from an arbitrary server.

I. Description

HP Virtual Rooms is software for online collaboration. HP Virtual Rooms requires Internet Explorer, as one of the components is an ActiveX control called HPVirtualRooms32, which is provided by the file HPVirtualRooms32.dll. The HPVirtualRooms32 ActiveX control contains dangerous methods, but does not place any restrictions on which web sites can use the control. These methods can be used to download and execute arbitrary code from an arbitrary server.

II. Impact

By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), an attacker may be able to execute arbitrary code with the privileges of the user.

III. Solution

Apply an update

This issue is addressed with the HP Virtual Rooms client 7.01. This update sets the kill bit for the vulnerable version of the ActiveX control, while providing an updated version with a different CLSID. Please see the HP Virtual Rooms 7.01 release notice for more details. This control is also disabled in Internet Explorer with the update for Microsoft Security Advisory (969898). Please also consider the following workarounds:

Disable the HPVirtualRooms32 ActiveX control in Internet Explorer

The vulnerable ActiveX control can be disabled in Internet Explorer by setting the kill bit for the following CLSID:

{00000032-9593-4264-8B29-930B3E4EDCCD}

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\{00000032-9593-4264-8B29-930B3E4EDCCD}]

"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.�

Systems Affected

Vendor	Status	Date Updated
Hewlett-Packard Company	Vulnerable	2008-10-01	2009-06-09

References

http://www.cert.org/tech_tips/securing_browser/
http://h10076.www1.hp.com/education/hpvr/docs/HP_Virtual_Rooms_Client_Build_2722.htm
http://www.microsoft.com/technet/security/advisory/969898.mspx
http://www.securityfocus.com/bid/33918
http://www.securityfocus.com/archive/1/501260
http://support.microsoft.com/kb/240797

Credit

This vulnerability was reported by Will Dormann of the CERT/CC.

This document was written by Will Dormann.

Other Information

Date Public	02/24/2009
Date First Published	02/26/2009 06:22:53 PM
Date Last Updated	06/09/2009
CERT Advisory
CVE Name	CVE-2009-0208
Metric	8.51
Document Revision	11

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