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The Remote Desktop Session Host must require secure RPC communications.


Overview

Finding ID Version Rule ID IA Controls Severity
V-63737 WN10-CC-000285 SV-78227r1_rule Medium
Description
Allowing unsecure RPC communication exposes the system to man in the middle attacks and data disclosure attacks. A man in the middle attack occurs when an intruder captures packets between a client and server and modifies them before allowing the packets to be exchanged. Usually the attacker will modify the information in the packets in an attempt to cause either the client or server to reveal sensitive information.
STIG Date
Windows 10 Security Technical Implementation Guide 2018-04-06

Details

Check Text ( C-64487r1_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\Terminal Services\

Value Name: fEncryptRPCTraffic

Value Type: REG_DWORD
Value: 1
Fix Text (F-69665r1_fix)
Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Remote Desktop Services >> Remote Desktop Session Host >> Security "Require secure RPC communication" to "Enabled".