Outgoing secure channel traffic must be signed when possible.

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

Part of Signing of Secure Channel Traffic

SV-52872r3_rule Outgoing secure channel traffic must be signed when possible.

Vulnerability discussion

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

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: SignSecureChannel 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 sign secure channel data (when possible)" to "Enabled".

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