OL 8 must disable the debug-shell systemd service.

The debug-shell requires no authentication and provides root privileges to anyone who has physical access to the machine. While this feature is disabled by default, masking it adds a layer of assurance that it will not be enabled via a dependency in "system". This also prevents attackers with physical access from trivially bypassing security on the machine through valid troubleshooting configurations and gaining root access when the system is rebooted.

Verify OL 8 is configured to mask the "debug-shell systemd" service with the following command:

$ sudo systemctl status debug-shell.service 

debug-shell.service Loaded: masked (Reason: Unit debug-shell.service is masked.) Active: inactive (dead)

If the "debug-shell.service" is loaded and not masked, this is a finding.

Configure the system to mask the "debug-shell systemd" service with the following command:

$ sudo systemctl mask debug-shell.service 

Created symlink /etc/systemd/system/debug-shell.service -> /dev/null

Reload the daemon to take effect:

$ sudo systemctl daemon-reload