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


Overview

Finding ID Version Rule ID IA Controls Severity
V-3666 WN12-SO-000070 SV-52922r1_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 Server 2012/2012 R2 Member Server Security Technical Implementation Guide 2017-06-09

Details

Check Text ( C-47227r2_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: NTLMMinServerSec

Value Type: REG_DWORD
Value: 0x20080000 (537395200)
Fix Text (F-45848r1_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) servers" to "Require NTLMv2 session security" and "Require 128-bit encryption" (all options selected).