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WN11-CC-000040 Insecure logons to an SMB server must be disabled.

DISA STIG library V2R11
All changes in this version
first version loaded CAT II

Maps to CM-6 via CCI-000366

Title

Insecure logons to an SMB server must be disabled.

Control

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)

Discussion

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

Related controls

CCI-000366

Fix

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