Software Engineering Institute

Akamai Download Manager is software designed to enhance the ability to download content. The Akamai Download Manager ActiveX control, provided by DownloadManagerV2.ocx, contains a buffer overflow vulnerability.

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.

Apply an update

This issue is addressed by version 2.2.1.0 of the ActiveX control.

This control also has been disabled via the kill bit in Microsoft Security Bulletin MS07-045.

Disable the Akamai Download Manager ActiveX control in Internet Explorer

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

{2AF5BD25-90C5-4EEC-88C5-B44DC2905D8B}
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\{2AF5BD25-90C5-4EEC-88C5-B44DC2905D8B}]
"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.