Windows Server 2022 session security for NTLM SSP-based servers must be configured to require NTLMv2 session security and 128-bit encryption.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-254478 | WN22-SO-000340 | SV-254478r991589_rule | Medium |
| Description |
| Microsoft has implemented a variety of security support providers for use with Remote Procedure Call (RPC) sessions. All of the options must be enabled to ensure the maximum security level. |
| STIG | Date |
| Microsoft Windows Server 2022 Security Technical Implementation Guide | 2025-01-14 |
Details
| Check Text (C-57963r849248_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-57914r849249_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). |