Windows Server 2019 machine inactivity limit must be set to 15 minutes or less, locking the system with the screen saver.

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Windows Server 2019 machine inactivity limit must be set to 15 minutes or less, locking the system with the screen saver.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-205633	WN19-SO-000120	SV-205633r569188_rule		Medium

Description
Unattended systems are susceptible to unauthorized use and should be locked when unattended. The screen saver should be set at a maximum of 15 minutes and be password protected. This protects critical and sensitive data from exposure to unauthorized personnel with physical access to the computer. Satisfies: SRG-OS-000028-GPOS-00009, SRG-OS-000029-GPOS-00010, SRG-OS-000031-GPOS-00012

STIG	Date
Microsoft Windows Server 2019 Security Technical Implementation Guide	2023-05-03

Details

Check Text ( C-5898r354817_chk )
If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: InactivityTimeoutSecs Value Type: REG_DWORD Value: 0x00000384 (900) (or less, excluding "0" which is effectively disabled)

Fix Text (F-5898r354818_fix)
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Interactive logon: Machine inactivity limit" to "900" seconds or less, excluding "0" which is effectively disabled.