Vulnerability Note VU#292713

Online Media Technologies NCTsoft NCTAudioFile2 ActiveX buffer overflow

Original Release date: 24 Jan 2007 | Last revised: 28 Apr 2008


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.


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.


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.


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:

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 (Learn More)

VendorStatusDate NotifiedDate Updated
GEAR Software, Inc. Affected-28 Apr 2008
Online Media Technologies, Ltd.Affected-24 Jan 2007
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



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

  • CVE IDs: CVE-2007-0018
  • Date Public: 24 Jan 2007
  • Date First Published: 24 Jan 2007
  • Date Last Updated: 28 Apr 2008
  • Severity Metric: 17.17
  • Document Revision: 18


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