Vulnerability Note VU#556801

SolidWorks sldimdownload ActiveX control fails to restrict access to methods

Overview

The SolidWorks sldimdownload ActiveX control contains methods that can allow a remote, unauthenticated attacker to run arbitrary code on a vulnerable system.

I. Description

SolidWorks provides 3D CAD software solutions. The SolidWorks sldimdownload ActiveX control is provided by the file sldimdownload.dll. It contains a method called Run(), which takes installerpath and applicationarguments parameters. This method can be used to execute arbitrary applications that may reside on remote servers.

II. Impact

By convincing a victim to view an HTML document (web page, HTML email, or email attachment), an attacker could run arbitrary code with the privileges of the user running IE.

III. Solution

Install an update

This issue has been addressed in the sldimdownload ActiveX control version 16,0,0,1. This version restricts the web domains that can use the control. To update, close all Internet Explorer windows. Go to %windir%\downloaded program files . Right click on sldimdownloadiface and select update. Please see the SolidWorks technical document for more information.

Remove the SolidWorks sldimdownload ActiveX control

Close all Internet Explorer windows. Go to %windir%\downloaded program files . Right click on sldimdownloadiface and select remove. Please see the SolidWorks technical document for more information.

Disable the SolidWorks sldimdownload ActiveX control in Internet Explorer

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

{AB6633A8-60A9-4F5D-B66C-ABE268CC3227}

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\{AB6633A8-60A9-4F5D-B66C-ABE268CC3227}]

"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 Notified	Date Updated
SolidWorks Corporation	Vulnerable	6-Apr-2007

References

http://www.cert.org/tech_tips/securing_browser/#Internet_Explorer
http://www.solidworks.com/pages/services/Tech_Tips/CERT_VU556801.html
http://support.microsoft.com/kb/240797
http://msdn.microsoft.com/workshop/components/activex/safety.asp
http://secunia.com/advisories/24762/
http://securitytracker.com/alerts/2007/Apr/1017855.html

Credit

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

This document was written by Will Dormann.

Other Information

Date Public:	2007-04-03
Date First Published:	2007-04-03
Date Last Updated:	2007-04-10
CERT Advisory:
CVE-ID(s):	CVE-2007-1684
NVD-ID(s):	CVE-2007-1684
US-CERT Technical Alerts:
Metric:	0.64
Document Revision:	9

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Produced 2007 by US-CERT, a government organization
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