Title

The SSH daemon must not allow rhosts RSA authentication. (Cat II impact)

Discussion

If SSH permits rhosts RSA authentication, a user may be able to log in based on the keys of the host originating the request and not any user-specific authentication.

Check Content

Check the SSH daemon configuration for the RhostsRSAAuthentication setting. # grep -i RhostsRSAAuthentication /etc/ssh/sshd_config | grep -v '^#' If the setting is present and set to "yes", this is a finding. If the setting is absent or set to "no", this is not a finding.

Fix Text

Edit the /etc/ssh/sshd_config file and remove the RhostsRSAAuthentication setting or change the value of the RhostsRSAAuthentication setting to "no".

Additional Identifiers

Rule ID: SV-40722r1_rule

Vulnerability ID: V-22487

Group Title: GEN005538

Expert Comments

CCIs tied to check.

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