Vulnerability Alert

Cisco Linksys WAG120N Command Execution Vulnerability

 
Threat Type:CWE-264: Permissions, Privileges, and Access Control
IntelliShield ID:27500
Version:1
First Published:2012 November 29 16:54 GMT
Last Published:2012 November 29 21:54 GMT
Port: Not available
BugTraq ID:46648
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:9.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:8.5
 
Version Summary:Cisco Linksys WAG120N contains a vulnerability that could allow an authenticated, remote user to execute arbitrary code on a targeted device. Updates are not available.
 
 
Description
Cisco Linksys WAG120N contains a vulnerability that could allow an authenticated, remote user to execute arbitrary code.

The vulnerability is due to insufficient security restrictions imposed by the affected software. An authenticated, remote attacker could exploit the vulnerability by browsing to a particular HTML file and injecting crafted commands into the vulnerable form fields of the affected file. When the malicious commands are processed by the affected software, they could execute with root privileges. A successful exploit could allow the attacker to execute arbitrary commands on the device with elevated privileges.

Cisco Linksys has confirmed the vulnerability; however software updates are not available.
 
Warning Indicators
Cisco Linksys WAG120N running firmware versions 1.00.16 and prior is vulnerable.
 
IntelliShield Analysis
To exploit the vulnerability, an attacker must authenticate to the vulnerable device This access requirement could reduce the likelihood of a successful attack.
 
Vendor Announcements
Official vendor announcements are not available; however, Cisco Consumer customers may direct further inquiries to Cisco Consumer Support at the following link: Cisco Home Networking Support
 
Impact
An authenticated, remote user could exploit the vulnerability to execute arbitrary commands with root privileges, which could allow the user to completely compromise the targeted device.
 
Technical Information
The vulnerability is due to insufficient validation and sanitization of user-supplied input to form fields when handling the Setup_DDNS.htm file.

An authenticated, remote user could exploit the vulnerability by browsing to /setup.cgi?next_file=Setup_DDNS.htm and injecting crafted commands into the vulnerable form fields. When the malicious commands are processed by the affected software, they could execute with root privileges. A successful exploit could allow the attacker to execute arbitrary commands with root privileges and allow the attacker to completely compromise the targeted device.
 
Safeguards
Administrators are advised to contact the vendor regarding future updates and releases.

Administrators are advised to allow only trusted users to access local systems.

Administrators are advised to allow only privileged users to access administration or management systems.

Administrators are advised to monitor affected systems.
 
Patches/Software
Software updates are not available.
 
Alert History
 
Initial Release


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

Primary Products:
Linksys by CiscoWAG120N Wireless-N Home ADSL2+ Modem Router 1.00 .07, .11, .12, .16

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.
Powered by  IntelliShield