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← Back to Microsoft Windows Server 2016 Security Technical Implementation Guide

V-225010

CAT II (Medium)

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

Rule ID

SV-225010r971545_rule

STIG

Microsoft Windows Server 2016 Security Technical Implementation Guide

Version

V2R10

CCIs

CCI-001967

Discussion

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.

Check Content

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

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Remote Procedure Call >> "Restrict Unauthenticated RPC clients" to "Enabled" with "Authenticated" selected.