[NT] Akamai Download Manager ActiveX Stack Buffer Overflow Vulnerability

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Akamai Download Manager ActiveX Stack Buffer Overflow Vulnerability
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SUMMARY

<http://www.akamai.com/html/technology/products/http_downloads.html>
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". 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.

DETAILS

Vulnerable Systems:
* Akamai Technologies Inc's DownloadManagerV2.ocx version 2.2.0.5

The ActiveX control in question has the following identifiers:
Class: DownloadManager Control
CLSID: 2AF5BD25-90C5-4EEC-88C5-B44DC2905D8B
ProgId: MANAGER.DLMCtrl.1.
File: C:\Windows\Downloaded Program Files\DownloadManagerV2.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.

Analysis:
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.

Workaround:
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.

Vendor response:
"Affected users can upgrade to the latest version of Akamai Download
Manager by visiting the following web page:
<http://dlm.tools.akamai.com/tools/upgrade.html>
http://dlm.tools.akamai.com/tools/upgrade.html

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
patched version."

CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1891>
CVE-2007-1891

Disclosure Timeline:
04/03/2007 - Initial vendor notification
04/03/2007 - Initial vendor response
04/16/2007 - Coordinated public disclosure


ADDITIONAL INFORMATION

The information has been provided by
<mailto:idlabs-advisories@xxxxxxxxxxxx> iDefense by McSlibin.
The original article can be found at:
<http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=514>
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=514



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