Vulnerability Note VU#120241

Akamai Download Manager ActiveX control buffer overflow

Overview

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.

I. Description

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.

II. Impact

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.

III. Solution

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.�

Systems Affected

Vendor	Status	Date Notified	Date Updated
Akamai Technologies, Inc.	Vulnerable	17-Apr-2007

References

http://www.cert.org/tech_tips/securing_browser/#Internet_Explorer
http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053794.html
http://www.fortiguardcenter.com/advisory/FGA-2007-05.html
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=514
http://secunia.com/advisories/24900/
http://www.microsoft.com/technet/security/Bulletin/MS07-045.mspx

Credit

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

Date Public:	2007-04-16
Date First Published:	2007-04-17
Date Last Updated:	2007-08-14
CERT Advisory:
CVE-ID(s):	CVE-2007-1891
NVD-ID(s):	CVE-2007-1891
US-CERT Technical Alerts:
Metric:	2.95
Document Revision:	6

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Produced 2007 by US-CERT, a government organization
Disclaimers and copyright information

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