Vulnerability Note VU#292713

Online Media Technologies NCTsoft NCTAudioFile2 ActiveX buffer overflow

Overview

The Online Media Technologies NCTsoft NCTAudioFile2 ActiveX control contains a buffer overflow vulnerability, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

Online Media Technologies NCTsoft provides an ActiveX control called NCTAudioFile2. This control is provided by the file NCTAudioFile2.dll. The NCTAudioFile2 ActiveX control is included with several applications, including, but not limited to:

Altdo Software Products
Xrlly Software
SoftDiv Software Products
EXPStudio Audio Editor
DB Audio Mixer And Editor
Movavi Products
Magic Video Products
Code-it Software Products
Audio Edit Magic
CDBurnerXP Pro

The NCTAudioFile2 ActiveX control contains a buffer overflow in the SetFormatLikeSample() method. This buffer overflow allows an attacker to overwrite the contents of the EIP (Extended Instruction Pointer) register, thus gaining control of program execution flow.

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

Disable the NCTAudioFile2 ActiveX control in Internet Explorer

The NCTAudioFile2 ActiveX control can be disabled in Internet Explorer by setting the kill bit for the following CLSID:

{77829F14-D911-40FF-A2F0-D11DB8D6D0BC}

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\{77829F14-D911-40FF-A2F0-D11DB8D6D0BC}]

"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
GEAR Software, Inc.	Vulnerable	28-Apr-2008
Online Media Technologies, Ltd.	Vulnerable	24-Jan-2007

References

Credit

This vulnerability was reported by Will Dormann of CERT/CC. The vulnerability was also independently discovered and publicly disclosed by Carsten Eiram of Secunia Research

This document was written by Will Dormann.

Other Information

Date Public:	2007-01-24
Date First Published:	2007-01-24
Date Last Updated:	2008-04-28
CERT Advisory:
CVE-ID(s):	CVE-2007-0018
NVD-ID(s):	CVE-2007-0018
US-CERT Technical Alerts:
Metric:	17.17
Document Revision:	18

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Produced 2007 by US-CERT, a government organization
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