← Back to Microsoft Windows Server 2019 Security Technical Implementation Guide

V-205861

CAT II (Medium)

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

Rule ID

SV-205861r991589_rule

STIG

Microsoft Windows Server 2019 Security Technical Implementation Guide

Version

V3R8

CCIs

CCI-000366

Discussion

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

Check Content

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\Policies\Microsoft\Windows\LanmanWorkstation\

Value Name: AllowInsecureGuestAuth

Type: REG_DWORD
Value: 0x00000000 (0)

Fix Text

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