Secure Boot must be enabled on Windows Server 2016 systems.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-90355	WN16-00-000470	SV-101005r2_rule		Low

Description
Secure Boot is a standard that ensures systems boot only to a trusted operating system. Secure Boot is required to support additional security features in Windows Server 2016, including Virtualization Based Security and Credential Guard. If Secure Boot is turned off, these security features will not function.

STIG	Date
Windows Server 2016 Security Technical Implementation Guide	2020-06-16

Details

Check Text ( C-90053r1_chk )
Some older systems may not have UEFI firmware. This is currently a CAT III; it will be raised in severity at a future date when broad support of Windows hardware and firmware requirements are expected to be met. Devices that have UEFI firmware must have Secure Boot enabled. Run "System Information". Under "System Summary", if "Secure Boot State" does not display "On", this is finding.

Fix Text (F-97099r1_fix)
Enable Secure Boot in the system firmware.