Windows Server 2019 must be configured to prevent the storage of the LAN Manager hash of passwords.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| high | V-205654 | SRG-OS-000073-GPOS-00041 | WN19-SO-000300 | SV-205654r1051063_rule | 2025-02-25 | 3 |
| 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. |
| ℹ️ Check |
|---|
| 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 |
|---|
| 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". |