V-205861 | Windows Server 2019 insecure logons to an ...

Microsoft Windows Server 2019

Windows Server 2019 insecure logons to an SMB server must be disabled

STIG ID: WN19-CC-000070 | SRG: SRG-OS-000480-GPOS-00227 | Severity: Medium | CCI: CCI-000366 | Vulnerability ID: V-205861

Description

Insecure guest logons allow unauthenticated access to shared folders. Shared resources on a system must require authentication to establish proper access.

Check

C-6126r355945_chk

If the following registry value does not exist or is not configured as specified, this is a finding:Registry Hive: HKEY_LOCAL_MACHINERegistry Path: \SOFTWARE\Policies\Microsoft\Windows\LanmanWorkstation\Value Name: AllowInsecureGuestAuthType: REG_DWORDValue: 0x00000000 (0)

Fix

F-6126r355946_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Network >> Lanman Workstation >> "Enable insecure guest logons" to "Disabled".