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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-244528	RHEL-08-010522	SV-244528r858709_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
Red Hat Enterprise Linux 8 Security Technical Implementation Guide	2022-09-07

Details

Check Text ( C-47803r858708_chk )
Verify the SSH daemon does not allow GSSAPI authentication with the following command: $ sudo grep -ir GSSAPIAuthentication /etc/ssh/sshd_config* GSSAPIAuthentication no If the value is returned as "yes", the returned line is commented out, 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-47760r743832_fix)
Configure the SSH daemon to not allow GSSAPI authentication. Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "no": GSSAPIAuthentication 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