====== 1.4.3 Ensure authentication required for single user mode (Scored) ======
=====Profile Applicability=====  
<code>
Level 1 - Server 
Level 1 - Workstation
</code>
=====Description=====
Single user mode is used for recovery when the system detects an issue during boot or by manual selection from the bootloader.
=====Rationale=====
Requiring authentication in single user mode prevents an unauthorized user from rebooting the system into single user to gain root privileges without credentials.
=====Audit===== 
Perform the following to determine if a password is set for the ''root'' user:
<Code:bash>
# grep ^root:[*\!]: /etc/shadow
</Code>
No results should be returned.
=====Remediation===== 
Run the following command and follow the prompts to set a password for the ''root'' user:
<Code:bash>
# passwd root
</Code>