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Anonymous enumeration of shares must not be allowed.


Overview

Finding ID Version Rule ID IA Controls Severity
V-225046 WN16-SO-000270 SV-225046r569186_rule High
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.
STIG Date
Microsoft Windows Server 2016 Security Technical Implementation Guide 2021-09-29

Details

Check Text ( C-26737r466040_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: RestrictAnonymous

Value Type: REG_DWORD
Value: 0x00000001 (1)
Fix Text (F-26725r466041_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".