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

From VMware vSphere ESXi 6.0 Security Technical Implementation Guide

Part of SRG-OS-000480-VMM-002000

Associated with: CCI-000366

SV-77693r1_rule The SSH daemon must be configured to only use Message Authentication Codes (MACs) employing FIPS 140-2 approved cryptographic hash algorithms.

Vulnerability discussion

DoD information systems are required to use FIPS 140-2 approved cryptographic hash functions.Note: This does not imply FIPS 140-2 certification.

Check content

To verify the MACs setting, 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

To set the MACs setting, add or correct the following line in "/etc/ssh/sshd_config": MACs hmac-sha1,hmac-sha2-256,hmac-sha2-512

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