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WN25-CC-000370 Windows Server 2025 Remote Desktop Services must require secure Remote Procedure Call (RPC) communications.

DISA STIG library V1R4
All changes in this version
first version loaded CAT II

Maps to AC-17(2) via CCI-000068, CCI-001453

Title

Windows Server 2025 Remote Desktop Services must require secure Remote Procedure Call (RPC) communications.

Control

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 Type: REG_DWORD Value: 0x00000001 (1)

Discussion

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. Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000250-GPOS-00093

Related controls

CCI-000068, CCI-001453

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".