1.5.3 Ensure authentication required for single user mode - /usr/lib/systemd/system/rescue.service

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Information

Single user mode (rescue mode) is used for recovery when the system detects an issue during boot or by manual selection from the bootloader. Requiring authentication in single user mode (rescue mode) prevents an unauthorized user from rebooting the system into single user to gain root privileges without credentials.

Solution

Edit /usr/lib/systemd/system/rescue.service and add/modify the following line: ExecStart=-/usr/lib/systemd/systemd-sulogin-shell rescue Edit /usr/lib/systemd/system/emergency.service and add/modify the following line: ExecStart=-/usr/lib/systemd/systemd-sulogin-shell emergency

See Also

https://workbench.cisecurity.org/files/2608