Software Engineering Institute

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

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:

{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.