Check: JUEX-NM-000480
Juniper EX Series Switches Network Device Management STIG:
JUEX-NM-000480
(in versions v1 r5 through v1 r1)
Title
The Juniper EX switch must be configured to authenticate SNMP messages using a FIPS-validated Keyed-Hash Message Authentication Code (HMAC). (Cat I 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 network device configuration to verify SNMP messages are authenticated using a FIPS-validated Keyed-Hash Message Authentication Code (HMAC). By default, SNMP is disabled. If used, verify SNMPv3 is configured (minimally) for authentication-sha. Although HMAC-MD5-96 is supported as required by RFC, Junos also supports HMAC-SHA, HMAC-SHA224/256/384/512. Configure the strongest HMAC supported by both the Juniper device and the Network Management System (NMS). [edit snmp v3] usm { local-engine { user <SNMPv3 user> { authentication-sha { authentication-key "$8$aes256-gcm$hmac-sha2-256$100$2CM/LosUGF4$A...<snip>...rflBKxq/w+jaAVF55Bsc6PA"; ## SECRET-DATA } } } } If the network device is not configured to authenticate SNMP messages using a FIPS-validated HMAC, this is a finding.
Fix Text
Configure the network device to authenticate SNMP messages using a FIPS-validated Keyed-Hash Message Authentication Code (HMAC). set snmp v3 usm local-engine user <SNMPv3 username> authentication-sha authentication-password "PSK"
Additional Identifiers
Rule ID: SV-253925r879768_rule
Vulnerability ID: V-253925
Group Title: SRG-APP-000395-NDM-000310
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-001937 |
The device used in the information system implementation of multifactor authentication for network access to privileged accounts meets organization-defined strength of mechanism requirements. |
| CCI-001967 |
The information system authenticates organization-defined devices and/or types of devices before establishing a local, remote, and/or network connection using bidirectional authentication that is cryptographically based. |