The AIX SSH daemon must not allow RhostsRSAAuthentication.

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 the SSH daemon configuration for the "RhostsRSAAuthentication" setting by running: # grep -i RhostsRSAAuthentication /etc/ssh/sshd_config | grep -v '^#'

The above command should yield the following output: RhostsRSAAuthentication no

If the setting is present and set to "yes", this is a finding.

Edit the "/etc/ssh/sshd_config file", add the following line, and save the change: RhostsRSAAuthentication no

Restart the SSH daemon: # stopsrc -s sshd # startsrc -s sshd