2718ea3f-5f25-4e6d-a693-3c426f14357f
The Kerberos v5 authentication protocol is the default protocol for authentication of users who are logging on to a Windows domain with domain accounts.
NTLM, which is less secure, is retained in later Windows versions for backwards compatibility with clients and servers that are running earlier versions of Windows, or applications that still use it. It is also used to authenticate logons to stand-alone computers that are running later versions.
To fix this configure the policy value for:
Computer Configuration
|_ Windows Settings
|_ Security Settings
|_ Local Policies
|_ Security Options
|_ Network security: LAN Manager authentication level to "Send NTLMv2 response only. Refuse LM & NTLM".
Stig: Desktop:
W11: https://www.stigviewer.com/stig/microsoft_windows_11/2024-06-10/finding/V-253462
W10: https://www.stigviewer.com/stig/microsoft_windows_10/2024-06-13/finding/V-220938 / https://www.stigviewer.com/stig/windows_10/2021-08-18/finding/V-220938
Server:
2022: https://www.stigviewer.com/stig/microsoft_windows_server_2022/2024-06-14/finding/V-254475
2019: https://www.stigviewer.com/stig/microsoft_windows_server_2019/2024-06-14/finding/V-205919 / https://www.stigviewer.com/stig/windows_server_2019/2020-06-15/finding/V-93301
2016: https://www.stigviewer.com/stig/microsoft_windows_server_2016/2024-02-21/finding/V-225054 / https://www.stigviewer.com/stig/windows_server_2016/2020-06-16/finding/V-73691
NOTE: Modifying this setting may affect compatibility with old clients, services and/or applications. Like outdated operation systems or old hardware. For more information https://support.microsoft.com/en-us/topic/client-service-and-program-issues-can-occur-if-you-change-security-settings-and-user-rights-assignments-0cb6901b-dcbf-d1a9-e9ea-f1b49a56d53a
NIST 800-53 Rev4: IA-5(6)
NIST 800-53 Rev5: IA-5(6)
NIST 800-171 Rev2: 3.5.10
NIST 800-171 Rev3 FPD: 3.5.7.c, 3.5.7.d, 3.5.12.f
NIST 800-171 Rev3: 03.05.07.c, 03.05.07.d, 03.05.12.f
NIST 800-171A: 3.5.10[a], 3.5.10[b]
NIST 800-171A Rev3: A.03.05.07.c, A.03.05.07.d, A.03.05.12.f[01], A.03.05.12.f[02]
PCI DSS v4: 8.3.11
CMMC v2 Level 2: IA.L2-3.5.10, IA.L2-3.5.10
CMMC v2.1 Level 2: IA.L2-3.5.10, IA.L2-3.5.10