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The 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-22460 GEN005507 SV-46012r3_rule Medium
Description
DoD information systems are required to use FIPS 140-2 approved cryptographic hash functions.
STIG Date
SUSE Linux Enterprise Server v11 for System z 2016-12-20

Details

Check Text ( C-43292r2_chk )
Check the SSH daemon configuration for allowed MACs.

Procedure:
# grep -i macs /etc/ssh/sshd_config | grep -v '^#'

If no lines are returned, or the returned MACs list contains any MAC less than "hmac-sha1", this is a finding.
Fix Text (F-39376r4_fix)
Edit the SSH daemon configuration and remove any MACs less than "hmac-sha1". If necessary, add a "MACs" line.

Restart the SSH daemon.
# /sbin/service sshd restart