Check: WN19-SO-000300
Microsoft Windows Server 2019 STIG:
WN19-SO-000300
(in versions v3 r2 through v1 r1)
Title
Windows Server 2019 must be configured to prevent the storage of the LAN Manager hash of passwords. (Cat I impact)
Discussion
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.
Check Content
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
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".
Additional Identifiers
Rule ID: SV-205654r1016448_rule
Vulnerability ID: V-205654
Group Title: SRG-OS-000073-GPOS-00041
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000196 |
The information system, for password-based authentication, stores only cryptographically-protected passwords. |
| CCI-004062 |
For password-based authentication, store passwords using an approved salted key derivation function, preferably using a keyed hash. |
Controls
| Number | Title |
|---|---|
| IA-5(1) |
Password-based Authentication |