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Windows Server 2016 must be configured to prevent the storage of the LAN Manager hash of passwords.


Overview

Finding ID Version Rule ID IA Controls Severity
V-73687 WN16-SO-000360 SV-88351r1_rule High
Description
The LAN Manager hash uses a weak encryption algorithm and there are several tools available that use this hash to retrieve account passwords. This setting controls whether a LAN Manager hash of the password is stored in the SAM the next time the password is changed.
STIG Date
Windows Server 2016 Security Technical Implementation Guide 2017-05-18

Details

Check Text ( C-73769r1_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\

Value Name: NoLMHash

Value Type: REG_DWORD
Value: 0x00000001 (1)
Fix Text (F-80137r1_fix)
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: Do not store LAN Manager hash value on next password change" to "Enabled".