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V-22458

CAT II (Medium)

The SSH daemon must be configured to only use FIPS 140-2 approved ciphers.

Rule ID

SV-46004r2_rule

STIG

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

Version

V1R12

CCIs

CCI-000068

Discussion

DoD information systems are required to use FIPS 140-2 approved ciphers. SSHv2 ciphers meeting this requirement are 3DES and AES.

Check Content

Check the SSH daemon configuration for allowed ciphers.
# grep -i ciphers /etc/ssh/sshd_config | grep -v '^#' 
If no lines are returned, or the returned ciphers list contains any cipher not starting with "3des" or "aes", this is a finding.

Fix Text

Edit the SSH daemon configuration and remove any ciphers not starting with "3des" or "aes". If necessary, add a "Ciphers" line.

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