The Terminal Server does not require secure RPC communication (Terminal Server Role).

From Windows 2008 Domain Controller Security Technical Implementation Guide

Associated with: CCI-001453

SV-16952r1_rule The Terminal Server does not require secure RPC communication (Terminal Server Role).

Vulnerability discussion

Allowing unsecure RPC communication exposes the server 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.

Check content

If the following registry value doesn’t exist or its value is not set to 1, then this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \Software\Policies\Microsoft\Windows NT\Terminal Services\ Value Name: fEncryptRPCTraffic Type: REG_DWORD Value: 1

Fix text

2008 - Configure the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Terminal Services -> Terminal Server -> Security “Require secure RPC communication” will be set to “Enabled”.

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