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Vulnerability Alert

Netgear DGN2200B userdefined Parameter Cross-Site Scripting Vulnerability

 
Threat Type:CWE-79: Cross-Site Scripting (XSS)
IntelliShield ID:29909
Version:1
First Published:2013 July 02 14:09 GMT
Last Published:2013 July 02 14:09 GMT
Port: Not available
Urgency:Unlikely Use
Credibility:Highly Credible
Severity:Mild Damage
CVSS Base:5.8 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:4.5
 
 
Version Summary:Netgear DGN2200B firmware contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks on a targeted system. Updates are not available.
 
 
Description
A vulnerability in Netgear DGN2200B firmware could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks on a targeted system.

The vulnerability is due to insufficient sanitization of user-supplied input by the affected software. An attacker could exploit this vulnerability by persuading a user to visit a malicious URL. When the URL is processed, it could allow the attacker to inject arbitrary script into the victim's web browser and execute it under the security context of the hosted website.

Proof-of-concept code that exploits this vulnerability is publicly available.

NetGear has not confirmed the vulnerability and software updates are not available.
 
Warning Indicators
Netgear DGN2200B firmware version 1.0.0.36_7.0.36 is vulnerable. Other versions could also be vulnerable.
 
IntelliShield Analysis
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the provided link.
 
Vendor Announcements
Vendor announcements are not available.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary script code in the user's browser session under the security context of the hosted website. This could allow the attacker to access sensitive browser information such as authentication cookies.
 
Technical Information
The vulnerability exists in the fw_serv_add.cgi script due to insufficient sanitization of user-supplied input.

An unauthenticated, remote attacker could exploit the vulnerability to by convincing a targeted user to visit a malicious URL crafted with a userdefined parameter. When the URL is processed, it could allow the attacker to execute arbitrary JavaScript code in the user's browser session in the security context of the affected site, and allow access sensitive browser information, such as authentication cookies.
 
Safeguards
Administrators are advised to contact the vendor for future updates and releases.

Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.

Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.

For additional information about cross-site scripting attacks and the methods used to exploit these vulnerabilities, see the Cisco Applied Mitigation Bulletin Understanding Cross-Site Scripting (XSS) Threat Vectors.
 
Patches/Software
Updated software is not available.
 
Alert History
 
Initial Release


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
NETGEARDGN2200B 1.0 .0.36

Associated Products:
N/A




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The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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