Outgoing secure channel traffic will be signed when possible.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-1164	3.042	SV-32307r1_rule	DCNR-1	Medium

Description
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, all outgoing secure channel traffic should be signed.

STIG	Date
Windows Server 2008 R2 Domain Controller Security Technical Implementation Guide	2012-09-05

Details

Check Text ( C-112r1_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 sign 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: SignSecureChannel 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-112r1_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 sign 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: SignSecureChannel

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-100r1_fix)
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”.