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