The Windows SMB server is not enabled to always perform SMB packet signing.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-6833	3.115	SV-25059r1_rule		Medium

Description
If this policy is enabled, it causes the Windows Server Message Block (SMB) server to always perform SMB packet signing.

STIG	Date
Windows 7 Security Technical Implementation Guide	2017-02-21

Details

Check Text ( C-3112r1_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 “Microsoft Network Server: Digitally sign communications (always)” 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\LanManServer\Parameters\ Value Name: RequireSecuritySignature Value Type: REG_DWORD Value: 1

Check Text ( C-3112r1_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 “Microsoft Network Server: Digitally sign communications (always)” 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\LanManServer\Parameters\

Value Name: RequireSecuritySignature

Value Type: REG_DWORD
Value: 1

Fix Text (F-6520r1_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “Microsoft Network Server: Digitally sign communications (always)” to “Enabled”.