Check Point Advisories

Cisco CNS Network Registrar Denial of Service (CVE-2004-1164)

Vulnerability
Protection

Check Point Reference:	CPAI-2004-204
Date Published:	27 May 2010
Severity:	High
Last Updated:	Thursday 27 May, 2010
Source:
Industry Reference:	CVE-2004-1164
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	CNS Network Registrar is a product suite developed by Cisco Systems that implements DNS, DHCP, and TFTP services for medium to large IP-based networks. The product suite provides a management architecture that allow for the configuration and management of one or more clusters of CNS Network Registrar devices. A vulnerability exists the way Cisco CNS Network Registrar handles network messages. The lock manager process, a component of the vulnerable product, will terminate upon receiving a specially crafted sequence of packets. This termination of this process will cause complete failure of the Central Configuration Management (CCM) server. An attacker can exploit this vulnerability to create a denial of service condition of the management services. CNS Network Registrar lock manager process will terminate upon receiving the specially crafted sequence of packets. This may also terminate the Central Configuration Management (CCM) server. The loss of the lock manager will prevent CCM from managing the various CNS components: DNS, DHCP , TFTP and configuration information such as address space, zones, user administration, and so on. An administrator must restart the server agent for normal operations to resume.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the Cisco CNS Network Registrar Denial of Service protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Cisco Protection Violation.
Attack Information: Cisco CNS Network Registrar denial of service