From Juniper Router NDM Security Technical Implementation Guide
Part of SRG-APP-000395-NDM-000310
Associated with: CCI-000068
Without the strong encryption that is provided by the SNMP Version 3 User-based Security Model (USM), an unauthorized user can gain access to network management information that can be used to create a network outage.
Review the router configuration to verify that it is compliant with this requirement as shown in the example below. snmp { v3 { usm { local-engine { user R5_NMS { authentication-sha { authentication-key "$9$vOiLX-Vb2oaUwsJDiHmPz3690BcSevM"; ## SECRET-DATA } privacy-aes128 { privacy-key "$9$3Q4T9CuOBESyK1IrvW87NwYgoDiPfz3nCs24Z"; ## SECRET-DATA } } } } target-address NMS_HOST { address 10.1.58.2; address-mask 255.255.255.0; tag-list NMS; target-parameters TP1; } target-parameters TP1 { parameters { message-processing-model v3; security-model usm; security-level privacy; security-name R5_NMS; } } notify SEND_TRAPS { type trap; tag NMS; } snmp-community index1 { security-name R5_NMS; tag NMS; } } } Note: SNMPv3 security level privacy also authenticates the messages using the configured HMAC. If the router is not configured to encrypt SNMP messages using a FIPS 140-2 approved algorithm, this is a finding.
Configure the router to encrypt SNMP messages using a FIPS 140-2 approved algorithm as shown in the example below. [edit snmp] set v3 usm local-engine user R5_NMS authentication-sha authentication-password xxxxxxxxxx set v3 usm local-engine user R5_NMS privacy-aes128 privacy-password xxxxxxxxxx set v3 target-address NMS_HOST address 10.1.58.2 edit v3 target-address NMS_HOST [edit snmp v3 target-address NMS_HOST] set address-mask 255.255.255.0 set tag-list NMS set target-parameters TP1 exit [edit snmp] set v3 target-parameters TP1 parameters message-processing-model v3 set v3 target-parameters TP1 parameters security-model usm set v3 target-parameters TP1 parameters security-name R5_NMS set v3 target-parameters TP1 parameters security-level privacy set v3 snmp-community index1 security-name R5_NMS tag NMS set v3 notify SEND_TRAPS type trap tag NMS Note: SNMPv3 security level privacy also authenticates the messages using the configured HMAC; hence, the authentication key must also be configured as shown in the example above.
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