OL09-00-002357 - OL 9 must not allow a noncertificate trusted host SSH logon to the system.

Information

SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts.

Solution

Configure OL 9 to not allow a noncertificate trusted host SSH logon to access the system.

Add or modify the following line in "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d".

HostbasedAuthentication no

Restart the SSH daemon for the settings to take effect:

$ sudo systemctl restart sshd.service

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Oracle_Linux_9_V1R6_STIG.zip