V-205915 | Windows Server 2019 must be configured to ...

Microsoft Windows Server 2019

Windows Server 2019 must be configured to prevent anonymous users from having the same permissions as the Everyone group

STIG ID: WN19-SO-000240 | SRG: SRG-OS-000480-GPOS-00227 | Severity: Medium | CCI: CCI-000366 | Vulnerability ID: V-205915

Description

Access by anonymous users must be restricted. If this setting is enabled, anonymous users have the same rights and permissions as the built-in Everyone group. Anonymous users must not have these permissions or rights.

Check

C-6180r356107_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: \SYSTEM\CurrentControlSet\Control\Lsa\Value Name: EveryoneIncludesAnonymousValue Type: REG_DWORDValue: 0x00000000 (0)

Fix

F-6180r356108_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Let Everyone permissions apply to anonymous users" to "Disabled".