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Security Activity Bulletin

Cisco DPC2420 Wireless Residential Gateway Multiple Vulnerabilities

 
Threat Type:IntelliShield: Security Activity Bulletin
IntelliShield ID:27610
Version:2
First Published:2012 December 12 16:41 GMT
Last Published:2013 April 10 12:40 GMT
Port: Not available
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
 
Version Summary:IntelliShield has updated this alert to include additional information to address the multiple vulnerabilities in Cisco DPC2420 Wireless Residential Gateway devices.
 

Description
 
Cisco DPC2420 Wireless Residential Gateway contains multiple vulnerabilities that could allow an unauthenticated, remote attacker to bypass security restrictions, access sensitive information, or conduct cross-site scripting attacks on a targeted system.

The vulnerability is due to improper security restrictions imposed by the affected software. When the remote configuration option is enabled, an attacker could download the configuration file with the parameters of filename.gwc=20 via TCP port 8080. Successful exploitation could allow an attacker to access sensitive information that could be used to conduct further attacks.

A second vulnerability is due to insufficient sanitization of user-supplied input processed by the management web interface. An unauthenticated, remote attacker could exploit this vulnerability by convincing a user with credentials on the targeted device to follow a link that is designed to submit malicious input to be processed by the affected software. Successful exploitation could allow the attacker to execute arbitrary JavaScript code in the security context of the affected web interface.

A third vulnerability is due to the authentication type of the web interface on the affected device. An attacker could exploit this vulnerability by perform ARP poisoning attacks on a targeted device to obtain the Base64-encoded password. If successful, an attacker could use this information to obtain the plaintext password, which could be use to log in the targeted device.

Proof-of-concept code that demonstrates these vulnerabilities is publicly available.

Cisco has confirmed these vulnerabilities in Cisco Bug IDs CSCua00126, CSCub54603, and CSCue42560. Software updates are not available.

Administrators are advised to contact the vendor regarding future updates and releases.

Administrators are advised to allow only trusted users to have network access.

Administrators are advised to monitor affected systems.
 
Alert History
 

Version 1, December 12, 2012, 4:41 PM: Cisco DPC2420 Wireless Residential Gateway contains multiple vulnerabilities that could allow an unauthenticated, remote attacker to bypass security restrictions, access sensitive information, or conduct cross-site scripting attacks on a targeted system. Updates are not available.

Initial Release


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

Primary Products:
CiscoCisco DPC2420 Wireless Residential Gateway D2425-P10-13-v202r12811-110511as-TRO Base

Associated Products:
N/A




Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service. This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.


LEGAL DISCLAIMER
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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