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Unauthenticated RPC clients must be restricted from connecting to the RPC server.


Overview

Finding ID Version Rule ID IA Controls Severity
V-225356 WN12-CC-000064-MS SV-225356r569185_rule Medium
Description
Configuring RPC to restrict unauthenticated RPC clients from connecting to the RPC server will prevent anonymous connections.
STIG Date
Microsoft Windows Server 2012/2012 R2 Member Server Security Technical Implementation Guide 2020-10-15

Details

Check Text ( C-27055r471410_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: \SOFTWARE\Policies\Microsoft\Windows NT\Rpc\

Value Name: RestrictRemoteClients

Type: REG_DWORD
Value: 1
Fix Text (F-27043r471411_fix)
Configure the policy value for Computer Configuration -> Administrative Templates -> System -> Remote Procedure Call -> "Restrict Unauthenticated RPC clients" to "Enabled" and "Authenticated".