STIGQter: STIG Summary: Arista MLS EOS 4.X NDM Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 02 Apr 2025:

The Arista network devices must use FIPS-validated Keyed-Hash Message Authentication Code (HMAC) to protect the integrity of remote maintenance sessions.

DISA Rule

SV-255960r961554_rule

Vulnerability Number

V-255960

Group Title

SRG-APP-000411-NDM-000330

Rule Version

ARST-ND-000690

Severity

CAT I

CCI(s)

• CCI-001941 - Implement replay-resistant authentication mechanisms for access to privileged accounts and/or non-privileged accounts.
• CCI-002890 - Implement organization-defined cryptographic mechanisms to protect the integrity of nonlocal maintenance and diagnostic communications.

Weight

10

Fix Recommendation

Configure the Arista network device to use FIPS-validated HMAC to protect the integrity of remote maintenance sessions.

switch(config)#management ssh
switch(config-mgmt-ssh)#mac hmac-sha2-256 hmac-sha2-512
switch(config-mgmt-ssh)#exit

Check Contents

Determine if the Arista network device is configured to use FIPS-validated HMAC to protect the integrity of remote maintenance sessions.

NOTE: Although allowed by SP800-131Ar2 for some applications, SHA-1 is considered a compromised hashing standard and is being phased out of use by industry and government standards. Unless required for legacy use, DOD systems should not be configured to use SHA-1 for integrity of remote access sessions.

Verify the HMAC settings for SSH using the following command:

switch#sh run | section management ssh

mac hmac-sha2-256 hmac-sha2-512

If the Arista network device does not implement replay-resistant authentication mechanisms for network access to privileged accounts, this is a finding.

Vulnerability Number

V-255960

Documentable

False

Rule Version

ARST-ND-000690

Severity Override Guidance

Determine if the Arista network device is configured to use FIPS-validated HMAC to protect the integrity of remote maintenance sessions.

NOTE: Although allowed by SP800-131Ar2 for some applications, SHA-1 is considered a compromised hashing standard and is being phased out of use by industry and government standards. Unless required for legacy use, DOD systems should not be configured to use SHA-1 for integrity of remote access sessions.

Verify the HMAC settings for SSH using the following command:

switch#sh run | section management ssh

mac hmac-sha2-256 hmac-sha2-512

If the Arista network device does not implement replay-resistant authentication mechanisms for network access to privileged accounts, this is a finding.

Check Content Reference

M

Target Key

5511