The OL 8 SSH daemon must not allow Kerberos authentication, except to fulfill documented and validated mission requirements.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-248606	OL08-00-010521	SV-248606r858574_rule		Medium

Description
Configuring this setting for the SSH daemon provides additional assurance that remote logon via SSH will require a password, even in the event of misconfiguration elsewhere.

STIG	Date
Oracle Linux 8 Security Technical Implementation Guide	2022-12-06

Details

Check Text ( C-52040r858573_chk )
Verify the SSH daemon does not allow Kerberos authentication with the following command: $ sudo grep -ir "KerberosAuthentication" /etc/ssh/sshd_config* KerberosAuthentication no If the value is returned as "yes", the returned line is commented out, or no output is returned, or has not been documented with the ISSO, this is a finding. If conflicting results are returned, this is a finding.

Fix Text (F-51994r779383_fix)
Configure the SSH daemon to not allow Kerberos authentication. Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "no": KerberosAuthentication no The SSH daemon must be restarted for the changes to take effect. To restart the SSH daemon, run the following command: $ sudo systemctl restart sshd.service