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Check: WN16-CC-000510

Microsoft Windows Server 2016 STIG: WN16-CC-000510 (in versions v2 r8 through v1 r1)

Title

The Windows Remote Management (WinRM) client must not allow unencrypted traffic. (Cat II impact)

Discussion

Unencrypted remote access to a system can allow sensitive information to be compromised. Windows remote management connections must be encrypted to prevent this. Satisfies: SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174

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\WinRM\Client\ Value Name: AllowUnencryptedTraffic Type: REG_DWORD Value: 0x00000000 (0)

Fix Text

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Remote Management (WinRM) >> WinRM Client >> "Allow unencrypted traffic" to "Disabled".

Additional Identifiers

Rule ID: SV-224959r877382_rule

Vulnerability ID: V-224959

Group Title: SRG-OS-000393-GPOS-00173

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-002890	The information system implements cryptographic mechanisms to protect the integrity of nonlocal maintenance and diagnostic communications.
CCI-003123	The information system implements cryptographic mechanisms to protect the confidentiality of nonlocal maintenance and diagnostic communications.

Controls

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

Number	Title
MA-4 (6)	Cryptographic Protection