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The SSH client 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-22463 GEN005512 SV-35210r3_rule Medium
Description
DoD information systems are required to use FIPS 140-2 approved cryptographic hash functions.
STIG Date
HP-UX 11.31 Security Technical Implementation Guide 2018-09-14

Details

Check Text ( C-36638r3_chk )
Check the SSH client configuration for allowed MACs. Note that keywords are case-insensitive and arguments (args) are case-sensitive.

Examine the file.
# cat /opt/ssh/etc/ssh_config | tr '\011' ' ' | tr -s ' ' | sed -e 's/^[ \t]*//' | grep -v '^#' | egrep -i "macs"

If no lines are returned, or the returned MACs list contains any MAC that is not hmac-sha1 or a better hmac algorithm that is on the FIPS 140-2 approved list, this is a finding.
Fix Text (F-32009r2_fix)
Edit the SSH client configuration and remove any MACs that are not hmac-sha1 or a better hmac algorithm that is on the FIPS 140-2 approved list. If necessary, add a MACs line.