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Check: WN16-CC-000410

Microsoft Windows Server 2016 STIG: WN16-CC-000410 (in versions v2 r9 through v1 r1)

Title

Remote Desktop Services must be configured with the client connection encryption set to High Level. (Cat II impact)

Discussion

Remote connections must be encrypted to prevent interception of data or sensitive information. Selecting "High Level" will ensure encryption of Remote Desktop Services sessions in both directions.

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: MinEncryptionLevel Type: REG_DWORD Value: 0x00000003 (3)

Fix Text

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Remote Desktop Services >> Remote Desktop Session Host >> Security >> "Set client connection encryption level" to "Enabled" with "High Level" selected.

Additional Identifiers

Rule ID: SV-224948r991554_rule

Vulnerability ID: V-224948

Group Title: SRG-OS-000250-GPOS-00093

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-001453	Implement cryptographic mechanisms to protect the integrity of remote access sessions.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
AC-17(2)	Protection of Confidentiality / Integrity Using Encryption