This website uses cookies to distinguish you from other users of our website. The use of cookies helps us to provide you with a specific service, to facilitate website use, to understand our visitors and to advertise to you. By continuing to browse the site you are giving consent to our use of cookies. Learn more in our Privacy Statement.

Security Services

Multiple Vendor NOS Microsystems getPlus Downloader Input Validation Vulnerability



The getPlus Downloader is an application download and installation manager, distributed in the form of an ActiveX control. This control is used by Adobe Systems Inc. to install Adobe Reader through the Adobe website when Internet Explorer is used. Part of the functionality of the getPlus Downloader is to download and execute applications from preconfigured sites; in the case of Adobe, from and its subdomains. For more information, see the vendor's site found at the following link.


Remote exploitation of an input validation vulnerability in NOS Microsystems Ltd.'s getPlus Download Manager, as used by Adobe and potentially other vendors, could allow an attacker to execute arbitrary code with the privileges of the current user.

The vulnerability exists due to improper validation of the domain used to download and execute applications from. The vulnerable code always assumes that the domain being validated is a subdomain, which can lead to a logic error when comparing the valid domain and the requested domain.


Exploitation of this vulnerability results in the execution of arbitrary code with the privileges of the user viewing the web page. To exploit this vulnerability, a targeted user must load a malicious webpage created by an attacker. An attacker typically accomplishes this via social engineering or injecting content into compromised, trusted sites. After the user visits the malicious web page, no further user interaction is needed.


iDefense has confirmed the existence of this vulnerability in getPlus version as distributed by Adobe. The Adobe Download Manager on Windows (prior to February 23, 2010) has been confirmed vulnerable by Adobe.


Setting the killbit for CLSID 'CF40ACC5-E1BB-4aff-AC72-04C2F616BCA7' will prevent this control from loading in Internet Explorer.


Adobe Systems Inc. has released a solution which addresses this issue. Information about downloadable vendor updates can be found by clicking on the URLs shown.


The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2010-0189 to this issue. This is a candidate for inclusion in the CVE list (, which standardizes names for security problems.


06/09/2009 Initial Vendor Notification
06/09/2009 Initial Vendor Reply
02/23/2010 Coordinated Public Disclosure


This vulnerability was reported to iDefense by Yorick Koster.

Get paid for vulnerability research

Free tools, research and upcoming events


Copyright © 2010 Verisign, Inc.

Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDefense. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please e-mail customer service for permission.

Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.