Windows Server 2016 accounts must require passwords.

STIG ID: WN16-00-000220  |  SRG: SRG-OS-000104-GPOS-00051 |  Severity: medium |  CCI: CCI-000764 |  Vulnerability Id: V-224838 | 

Vulnerability Discussion

The lack of password protection enables anyone to gain access to the information system, which opens a backdoor opportunity for intruders to compromise the system as well as other resources. Accounts on a system must require passwords.

Check

Review the password required status for enabled user accounts.

Open "PowerShell".

Domain Controllers:

Enter "Get-Aduser -Filter * -Properties Passwordnotrequired |FT Name, Passwordnotrequired, Enabled".

Exclude disabled accounts (e.g., DefaultAccount, Guest) and Trusted Domain Objects (TDOs).

If "Passwordnotrequired" is "True" or blank for any enabled user account, this is a finding.

Member servers and standalone or nondomain-joined systems:

Enter 'Get-CimInstance -Class Win32_Useraccount -Filter "PasswordRequired=False and LocalAccount=True" | FT Name, PasswordRequired, Disabled, LocalAccount'.

Exclude disabled accounts (e.g., DefaultAccount, Guest).

If any enabled user accounts are returned with a "PasswordRequired" status of "False", this is a finding.

Fix

Configure all enabled user accounts to require passwords.

The password required flag can be set by entering the following on a command line: "Net user [username] /passwordreq:yes", substituting [username] with the name of the user account.