V-205724 | Windows Server 2019 must not allow anonymo...

Microsoft Windows Server 2019

Windows Server 2019 must not allow anonymous enumeration of shares

STIG ID: WN19-SO-000230 | SRG: SRG-OS-000138-GPOS-00069 | Severity: High | CCI: CCI-001090 | Vulnerability ID: V-205724

Description

Allowing anonymous logon users (null session connections) to list all account names and enumerate all shared resources can provide a map of potential points to attack the system.

Check

C-5989r355090_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: RestrictAnonymousValue Type: REG_DWORDValue: 0x00000001 (1)

Fix

F-5989r355091_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Do not allow anonymous enumeration of SAM accounts and shares" to "Enabled".