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Check: WN12-CC-000051

Microsoft Windows Server 2012/2012 R2 Domain Controller STIG: WN12-CC-000051 (in versions v3 r7 through v2 r7)

Title

Local users on domain-joined computers must not be enumerated. (Cat II impact)

Discussion

The username is one part of logon credentials that could be used to gain access to a system. Preventing the enumeration of users limits this information to authorized personnel.

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: \Software\Policies\Microsoft\Windows\System\ Value Name: EnumerateLocalUsers Type: REG_DWORD Value: 0

Fix Text

Configure the policy value for Computer Configuration -> Administrative Templates -> System -> Logon -> "Enumerate local users on domain-joined computers" to "Disabled".

Additional Identifiers

Rule ID: SV-226170r794431_rule

Vulnerability ID: V-226170

Group Title: SRG-OS-000095-GPOS-00049

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-000381	The organization configures the information system to provide only essential capabilities.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
CM-7	Least Functionality