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	ECSC-1	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 Domain Controller Security Technical Implementation Guide	2014-07-09

Details

Check Text ( None )
None

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".