Remote Desktop Services must limit users to one remote session.

From Windows Server 2012/2012 R2 Domain Controller Security Technical Implementation Guide

Associated with IA controls: ECLO-1, ECLO-2

Associated with: CCI-000054

SV-52216r2_rule Remote Desktop Services must limit users to one remote session.

Vulnerability discussion

Allowing multiple Remote Desktop Services sessions could consume resources. There is also potential to make a secondary connection to a system with compromised credentials.

Check content

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: fSingleSessionPerUser Type: REG_DWORD Value: 1

Fix text

Configure the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Remote Desktop Services -> Remote Desktop Session Host -> Connections -> "Restrict Remote Desktop Services users to a single Remote Desktop Services Session" to "Enabled".

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