The ESXi host SSH daemon must be configured to only use Message Authentication Codes (MACs) employing FIPS 140-2 approved cryptographic hash algorithms.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-207618	ESXI-65-000017	SV-207618r388482_rule		Medium

Description
DoD information systems are required to use FIPS 140-2 approved cryptographic hash functions.

STIG	Date
VMware vSphere 6.5 ESXi Security Technical Implementation Guide	2021-09-22

Details

Check Text ( C-7873r364253_chk )
From an SSH session connected to the ESXi host, or from the ESXi shell, run the following command: # grep -i "^MACs" /etc/ssh/sshd_config If there is no output or the output is not exactly "MACs hmac-sha1,hmac-sha2-256,hmac-sha2-512", this is a finding.

Fix Text (F-7873r364254_fix)
From an SSH session connected to the ESXi host, or from the ESXi shell, add or correct the following line in "/etc/ssh/sshd_config": MACs hmac-sha1,hmac-sha2-256,hmac-sha2-512