Vulnerability Note VU#962305

Second Sight Software ActiveMod ActiveX control stack buffer overflow

Overview

The Second Sight Software ActiveMod ActiveX control contains a stack buffer overflow, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

Second Sight Software ActiveMod is a music player that is provided as an ActiveX control. The control, which is provided by ActiveMod.ocx, contains a stack buffer overflow vulnerability.

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. The attacker could also cause the web browser to crash.

III. Solution

We are currently unaware of a practical solution to this problem. Please consider the following workarounds:

Disable the ActiveMod ActiveX control in Internet Explorer

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

{2078D6EC-693C-4FB2-AE7B-A6B8D2BC4DC8}

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\{2078D6EC-693C-4FB2-AE7B-A6B8D2BC4DC8}]

"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
Second Sight Software	Vulnerable	18-Apr-2007

References

http://www.cert.org/tech_tips/securing_browser/#Internet_Explorer
http://support.microsoft.com/kb/240797
http://www.freetoolsassociation.com/
http://secunia.com/advisories/24928/

Credit

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

This document was written by Will Dormann.

Other Information

Date Public	04/18/2007
Date First Published	04/18/2007 01:21:34 PM
Date Last Updated	04/19/2007
CERT Advisory
CVE Name	CVE-2007-1691
US-CERT Technical Alerts
Metric	0.37
Document Revision	10

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Produced 2007 by US-CERT, a government organization
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