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Akamai Download Manager ActiveX Stack Buffer Overflow Vulnerability



Akamai Technologies, Inc's provides distributed computing platform for global Internet content caching and application delivery. Akamai Download Manager is a component of Akamai's service. For more information please visit following websites.



Remote exploitation of a buffer overflow vulnerability in Akamai Technologies, Inc's Download Manager ActiveX Control could allow an attacker to execute arbitrary code within the security context of the targeted user.

The ActiveX control in question has the following identifiers:

 Class: DownloadManager Control CLSID: 2AF5BD25-90C5-4EEC-88C5-B44DC2905D8B ProgId: MANAGER.DLMCtrl.1. File: C:WindowsDownloaded Program FilesDownloadManagerV2.ocx 

The vulnerability specifically exists due to incorrect use of the GetPrivateProfileSectionW function. The nSize parameter is incorrectly passed the total number of bytes available, rather than the number of wide characters available. This leads to an exploitable stack-based buffer overflow.


Successful exploitation of this vulnerability would allow a remote attacker to execute arbitrary code within the context of the targeted user.

In order to exploit this vulnerability, an attacker would need to persuade the victim into viewing a malicious web site. This is usually accomplished by getting the victim into clicking a link in a form of electronic communication such as e-mail or instant messaging. Additionally, the victim must either accept and install, or already have the download manager control on their system.


iDefense has confirmed the existence of this vulnerability within version of Akamai Technologies Inc's DownloadManagerV2.ocx. All older versions are suspected to be vulnerable.


Setting the kill-bit for this control will prevent it from being loaded within Internet Explorer. However, doing so will prevent legitimate use of the control.


"Affected users can upgrade to the latest version of Akamai Download Manager by visiting the following web page:


Visiting that page or any other Download Manager enabled page will prompt the user to install the latest version of the software automatically. Akamai has successfully coordinated with each of our enterprise customers to ensure that all are distributing the patched version."


The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-1891 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.


04/03/2007 Initial vendor notification
04/03/2007 Initial vendor response
04/16/2007 Coordinated public disclosure


This vulnerability was reported to iDefense by McSlibin.

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Copyright © 2007 Verisign, Inc.

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