STIG V-225046 | Anonymous enumeration of shares must ...

Microsoft Windows Server 2016

Anonymous enumeration of shares must not be allowed

STIG ID: WN16-SO-000270 | SRG: SRG-OS-000138-GPOS-00069 | Severity: High | CCI: CCI-001090 | Vulnerability ID: V-225046

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

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

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".