Outgoing secure channel traffic is not encrypted when possible.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-1163	3.043	SV-29515r1_rule		Medium

Description
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 should be encrypted.

STIG	Date
Windows 2008 Domain Controller Security Technical Implementation Guide	2017-03-02

Details

Check Text ( C-114r1_chk )
Analyze the system using the Security Configuration and Analysis snap-in. Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for “Domain Member: Digitally encrypt secure channel data (when possible)” is not set to “Enabled”, then this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\Netlogon\Parameters\ Value Name: SealSecureChannel Value Type: REG_DWORD Value: 1 Note: If the value for “Domain Member: Digitally encrypt or sign secure channel data (always)” is set to “Enabled”, then this would not be a finding.

Check Text ( C-114r1_chk )

Analyze the system using the Security Configuration and Analysis snap-in.
Expand the Security Configuration and Analysis tree view.
Navigate to Local Policies -> Security Options.

If the value for “Domain Member: Digitally encrypt secure channel data (when possible)” is not set to “Enabled”, then this is a finding.

The policy referenced configures the following registry value:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \System\CurrentControlSet\Services\Netlogon\Parameters\

Value Name: SealSecureChannel

Value Type: REG_DWORD
Value: 1

Note: If the value for “Domain Member: Digitally encrypt or sign secure channel data (always)” is set to “Enabled”, then this would not be a finding.

Fix Text (F-101r1_fix)
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”.