Home Programs Emergency management Response CCIRC Analytical releases2 AV06-037: Cisco IOS Data Over Cable Service Interface Specification SNMP Access Issue

Cisco IOS Data Over Cable Service Interface Specification SNMP Access Issue

Number: AV06-037
Date: 21 September 2006

Purpose

The purpose of this advisory is to bring attention to a vulnerability that has been identified in Cisco IOS running on the Cisco IAD2400 series, 1900 Series Mobile Wireless Edge Routers and Cisco VG224 Analog Phone Gateways.

Assessment

A vulnerability has been identified in Cisco IOS running on the Cisco IAD2400 series, 1900 Series Mobile Wireless Edge Routers and Cisco VG224 Analog Phone Gateways, which could be exploited by remote attackers to gain unauthorized access to a vulnerable device. This flaw is due to a design error where a default hard-coded Simple Network Management Protocol (SNMP) community string ("cable-docsis") intended for Data Over Cable Service Interface Specification (DOCSIS) compliant interfaces is enabled on devices configured for SNMP management.

The following products have been reported as vulnerable:

• Cisco IAD2430 Integrated Access Device
• Cisco IAD2431 Integrated Access Device
• Cisco IAD2432 Integrated Access Device
• Cisco VG224 Analog Phone Gateway
• Cisco MWR 1900 Mobile Wireless Edge Router
• Cisco MWR 1941 Mobile Wireless Edge Router

The following versions of Cisco IOS have been reported as vulnerable:

• Cisco IOS 12.2
• Cisco IOS 12.3
• Cisco IOS 12.4

Suggested action

PSEPC recommends that administrators test and upgrade to a fixed software version listed on the Cisco web page:

http://www.cisco.com/warp/public/707/cisco-sa-20060920-docsis.shtml#software

For more information and instructions, please refer to:

Note to readers

Canadian Cyber Incident Response Centre (CCIRC) collects information related to cyber threats to, and incidents involving, Canadian critical infrastructure. This allows us to monitor and analyze threats and to issue alerts, advisories and other information products. To report threats or incidents, please contact the Government Operations Centre (GOC) at 613-991-7000 or goc-cog@psepc-sppcc.gc.ca by e-mail.

Unauthorized use of computer systems and mischief in relation to data are serious Criminal Code offences in Canada. Any suspected criminal activity should be reported to local law enforcement organizations. The Royal Canadian Mounted Police (RCMP) National Operations Centre (N.O.C.) provides a 24/7 service to receive such reports or to redirect callers to local law enforcement organizations. The N.O.C. can be reached at 613-993-4460. National security concerns should be reported to the Canadian Security Intelligence Service (CSIS) at 613-993-9620.

For urgent matters or to report any incidents, please contact the Government Operations Centre at:

Phone: 613-991-7000
Fax: 613-996-0995
Secure Fax: 613-991-7094
Email: goc-cog@psepc-sppcc.gc.ca

For general information on critical infrastructure protection and emergency preparedness, please contact PSEPC's Public Affairs division at:

Telephone: 613-944-4875 or 1-800-830-3118
Fax: 613-998-9589
E-mail: communications@psepc-sppcc.gc.ca