Outgoing secure channel traffic must be encrypted when possible.

From Windows Server 2012/2012 R2 Member Server Security Technical Implementation Guide

Part of Encryption of Secure Channel Traffic

SV-52871r3_rule Outgoing secure channel traffic must be encrypted when possible.

Vulnerability discussion

Requests sent on the secure channel are authenticated, and sensitive information (such as passwords) is encrypted, but not all information is encrypted. If this policy is enabled, outgoing secure channel traffic will be encrypted.

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: \SYSTEM\CurrentControlSet\Services\Netlogon\Parameters\ Value Name: SealSecureChannel Value Type: REG_DWORD Value: 1 If the value for "Domain Member: Digitally encrypt or sign secure channel data (always)" is set to "Enabled", this can be NA (see V-6831).

Fix text

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Domain member: Digitally encrypt secure channel data (when possible)" to "Enabled".

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