Title

The SSH client must be configured to only use FIPS 140-2 approved ciphers. (Cat II impact)

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 client configuration for allowed ciphers. # grep -i ciphers /etc/ssh/ssh_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 client configuration and remove any ciphers not starting with "3des" or "aes". If necessary, add a "Ciphers" line.

Additional Identifiers

Rule ID: SV-46015r1_rule

Vulnerability ID: V-22461

Group Title: GEN005510

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.