Vulnerability Note VU#120241

Akamai Download Manager ActiveX control buffer overflow

Original Release date: 17 Apr 2007 | Last revised: 14 Aug 2007


The Akamai Download Manager ActiveX control contains a buffer overflow, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.


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 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:

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. 

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
Akamai Technologies, Inc.Affected-17 Apr 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 iDefense, who in turn credit McSlibin. It was also reported by The Fortinet Security Research Team.

This document was written by Will Dormann.

Other Information

  • CVE IDs: CVE-2007-1891
  • Date Public: 16 Apr 2007
  • Date First Published: 17 Apr 2007
  • Date Last Updated: 14 Aug 2007
  • Severity Metric: 2.95
  • Document Revision: 6


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