← Back to SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

V-22460

CAT II (Medium)

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

Rule ID

SV-46012r3_rule

STIG

SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Version

V1R12

CCIs

CCI-001453

Discussion

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

Check Content

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

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