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Unauthenticated Remote Procedure Call (RPC) clients must be restricted from connecting to the RPC server.


Overview

Finding ID Version Rule ID IA Controls Severity
V-225010 WN16-MS-000040 SV-225010r877039_rule Medium
Description
Unauthenticated RPC clients may allow anonymous access to sensitive information. Configuring RPC to restrict unauthenticated RPC clients from connecting to the RPC server will prevent anonymous connections.
STIG Date
Microsoft Windows Server 2016 Security Technical Implementation Guide 2023-08-22

Details

Check Text ( C-26701r857261_chk )
This applies to member servers and standalone or nondomain-joined systems. It is NA for domain controllers.

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: 0x00000001 (1)
Fix Text (F-26689r465933_fix)
Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Remote Procedure Call >> "Restrict Unauthenticated RPC clients" to "Enabled" with "Authenticated" selected.