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Check: WN16-SO-000520

Microsoft Windows Server 2016 STIG: WN16-SO-000520 (in versions v2 r9 through v1 r1)

Title

User Account Control must run all administrators in Admin Approval Mode, enabling UAC. (Cat II impact)

Discussion

User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting enables UAC. Satisfies: SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPOS-00156

Check Content

UAC requirements are NA for Server Core installations (this is the default installation option for Windows Server 2016 versus Server with Desktop Experience) as well as Nano Server. 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\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: EnableLUA Value Type: REG_DWORD Value: 0x00000001 (1)

Fix Text

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "User Account Control: Run all administrators in Admin Approval Mode" to "Enabled".

Additional Identifiers

Rule ID: SV-225067r1001261_rule

Vulnerability ID: V-225067

Group Title: SRG-OS-000373-GPOS-00157

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CCIs

CCIs tied to check.

Number	Definition
CCI-002038	The organization requires users to reauthenticate upon organization-defined circumstances or situations requiring reauthentication.

Controls

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

Number	Title
IA-11	Re-authentication