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Insecure logons to an SMB server must be disabled.


Overview

Finding ID Version Rule ID IA Controls Severity
V-73507 WN16-CC-000080 SV-88159r1_rule Medium
Description
Insecure guest logons allow unauthenticated access to shared folders. Shared resources on a system must require authentication to establish proper access.
STIG Date
Windows Server 2016 Security Technical Implementation Guide 2017-05-18

Details

Check Text ( C-73581r1_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\Policies\Microsoft\Windows\LanmanWorkstation\

Value Name: AllowInsecureGuestAuth

Type: REG_DWORD
Value: 0x00000000 (0)
Fix Text (F-79949r1_fix)
Configure the policy value for Computer Configuration >> Administrative Templates >> Network >> Lanman Workstation >> "Enable insecure guest logons" to "Disabled".