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Anonymous enumeration of SAM accounts must not be allowed.


Overview

Finding ID Version Rule ID IA Controls Severity
V-26283 WN12-SO-000051 SV-53122r1_rule High
Description
Anonymous enumeration of SAM accounts allows anonymous log on users (null session connections) to list all accounts names, thus providing a list of potential points to attack the system.
STIG Date
Windows Server 2012/2012 R2 Member Server Security Technical Implementation Guide 2017-02-27

Details

Check Text ( C-47428r1_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: RestrictAnonymousSAM

Value Type: REG_DWORD
Value: 1
Fix Text (F-46048r1_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" to "Enabled".