The Windows Remote Management (WinRM) service must not allow unencrypted traffic.

Documentable No

Rule ID SV-253419r958850_rule

CCI References

CCI-003123

Discussion

Unencrypted remote access to a system can allow sensitive information to be compromised. Windows remote management connections must be encrypted to prevent this.

Check Procedure

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\Service\

Value Name: AllowUnencryptedTraffic

Value Type: REG_DWORD
Value: 0

Fix Action

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