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Akamai Download Manager Arbitrary Program Execution Vulnerability
iDefense Security Advisory 04.30.08: Akamai Download Manager Arbitrary Program Execution Vulnerability
iDefense Security Advisory 04.30.08: Akamai Download Manager Arbitrary Program Execution Vulnerability

iDefense Security Advisory 04.30.08
Apr 30, 2008


Akamai Download Manager is an integral component of Akamai's global
distribution service. It is used to deliver big files quickly and
reliably to users around world. It has been used by vendors such as
Symantec and Microsoft to provide downloads to the public.

Akamai provides both an ActiveX and a Java based Download Manager. If a
user uses the ActiveX control once, it will remain installed on the
users computer until manually removed. For more information, please
visit following web sites.




Remote exploitation of a design error in Akamai Technologies, Inc's
Download Manager allows attackers to execute arbitrary code in the
context of the current user.

The ActiveX control version has the following identifiers:

  Class: DownloadManager Control
  CLSID: 2AF5BD25-90C5-4EEC-88C5-B44DC2905D8B
  CLSID: FFBB3F3B-0A5A-4106-BE53-DFE1E2340CB1
  ProgId: MANAGER.DLMCtrl.1.
  File: C:\Windows\Downloaded Program Files\DownloadManagerV2.ocx

The Java version has the following identifiers:

  Class: com.akamai.dm.ui.applet.DMApplet.class
  JAR: dlm-java-

This problem specifically exists due to two undocumented object
parameters. By using these parameters, it is possible to cause Download
Manager to automatically download and execute arbitrary binaries from
attacker controlled locations.


Exploitation allows an attacker to execute arbitrary code in the context
of the user viewing a maliciously crafted web page.

In order to exploit this vulnerability, an attacker would need to
persuade, or otherwise force, a user to view a malicious web page. This
is usually accomplished by getting the targeted user to click a link in
a form of electronic communication such as e-mail or instant messaging.

While the attack is happening, the Download Manager user interface is
displayed. However, in a normal attack scenario there is insufficient
time to cancel the download before exploitation occurs.


iDefense confirmed the existence of this vulnerability using version of Akamai Technologies Inc's DownloadManagerV2.ocx.
Additionally, iDefense confirmed the problem exists in version
of the Download Manager Java Applet. All versions prior to the fixed
version are suspected to be vulnerable.


Setting kill-bits for the associated CLSIDs will prevent the ActiveX
control from being loaded within Internet Explorer, thereby preventing

Disabling Java will prevent exploitation using the Java Applet version.


Akamai has addressed this vulnerability with the release of version of their Download Manager product. For more information, refer
to their advisory. To download the updated version, visit the following



The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2008-6339 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for 
security problems.


12/06/2007  Initial vendor notification
12/06/2007  Initial vendor response
04/30/2008  Public disclosure


This vulnerability was reported to iDefense by Peter Vreugdenhil.

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Copyright =A9 2008 iDefense, Inc.

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