Title

The Cisco ASA must be configured to authenticate Simple Network Management Protocol (SNMP) messages using a FIPS-validated Keyed-Hash Message Authentication Code (HMAC). (Cat II impact)

Discussion

Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Bidirectional authentication provides stronger safeguards to validate the identity of other devices for connections that are of greater risk. A local connection is any connection with a device communicating without the use of a network. A network connection is any connection with a device that communicates through a network (e.g., local area or wide area network, internet). A remote connection is any connection with a device communicating through an external network (e.g., the internet). Because of the challenges of applying this requirement on a large scale, organizations are encouraged to only apply the requirement to those limited number (and type) of devices that truly need to support this capability.

Check Content

Review the Cisco ASA configuration to verify that it is compliant with this requirement as shown in the example below. snmp-server group NETOPS v3 priv snmp-server user FWADMIN NETOPS v3 engineID xxxxxxxxxxxx encrypted auth sha xxxxxxxxxxxxxxxx snmp-server host NDM_INTERFACE 10.1.48.10 version 3 FWADMIN If the Cisco ASA is not configured to authenticate SNMP messages using a FIPS-validated HMAC, this is a finding.

Fix Text

Configure the Cisco ASA to authenticate SNMP messages as shown in the example below. ASA(config)# snmp-server group NETOPS v3 priv ASA(config)# snmp-server user FWADMIN NETOPS v3 auth sha xxxxxxxxxxxxxxx ASA(config)# snmp-server host NDM_INTERFACE 10.1.48.10 version 3 FWADMIN ASA(config)# end

Additional Identifiers

Rule ID: SV-239927r879768_rule

Vulnerability ID: V-239927

Group Title: SRG-APP-000395-NDM-000310

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.