Online Media Technologies NCTSoft NCTAudioGrabber2 ActiveX stack buffer overflows

Overview

The Online Media Technologies NCTSoft NCTAudioGrabber2 ActiveX control contains multiple stack buffer overflows, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

Description

Online Media Technologies, which was formerly known as NCT Company, provides multimedia ActiveX controls for Microsoft Windows systems. The NCTAudioGrabber2 ActiveX control, which is provided by NCTAudioGrabber2.dll, contains multiple stack buffer overflows.

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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.

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Solution

We are currently unaware of a practical solution to this problem. Online Media Technologies has indicated that they will not be providing any updates for NCTSoft ActiveX controls. Please consider the following workarounds:

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Disable the NCTAudioGrabber2 ActiveX control in Internet Explorer

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

{34A261F9-FC34-47F8-A35C-75FB73BB1358}
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\{34A261F9-FC34-47F8-A35C-75FB73BB1358}]
"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.

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Vendor Information

656593

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Online Media Technologies, Ltd. __ Affected

Notified: March 05, 2007 Updated: May 27, 2008

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The vendor is no longer supporting the NCT ActiveX controls. Please disable the vulnerable control.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23656593 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.nctsoft.com/&gt;
• <http://support.microsoft.com/kb/240797&gt;

Acknowledgements

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

This document was written by Will Dormann.

Other Information

CVE IDs:	CVE-2008-0958
Severity Metric:	2.43 Date Public: