The system must be configured to meet the minimum session security requirement for NTLM SSP based clients.

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The system must be configured to meet the minimum session security requirement for NTLM SSP based clients.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-63805	WN10-SO-000215	SV-78295r1_rule		Medium

Description
Microsoft has implemented a variety of security support providers for use with RPC sessions. All of the options must be enabled to ensure the maximum security level.

STIG	Date
Windows 10 Security Technical Implementation Guide	2019-01-04

Details

Check Text ( C-64555r1_chk )
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\Control\Lsa\MSV1_0\ Value Name: NTLMMinClientSec Value Type: REG_DWORD Value: 0x20080000 (537395200)

Fix Text (F-69733r1_fix)
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: Minimum session security for NTLM SSP based (including secure RPC) clients" to "Require NTLMv2 session security" and "Require 128-bit encryption" (all options selected).