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

Documentable No

Rule ID SV-253383r971545_rule

CCI References

CCI-001967

Discussion

Configuring RPC to restrict unauthenticated RPC clients from connecting to the RPC server will prevent anonymous connections.

Check Procedure

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

Value Type: REG_DWORD
Value: 1

Fix Action

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