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

Open a terminal session and enter the following command. grep -i ciphers /etc/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

Open a terminal session and edit the SSH client configuration file "/etc/ssh_config" and remove any ciphers not starting with "3DES" or "AES".

Additional Identifiers

Rule ID: SV-39371r1_rule

Vulnerability ID: V-22461

Group Title:

Expert Comments

CCIs tied to check.

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