User Account Control must automatically deny standard user requests for elevation.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
WN08-SO-000079	WN08-SO-000079	WN08-SO-000079_rule		Medium

Description
User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting controls the behavior of elevation when requested by a standard user account.

STIG	Date
Windows 8 Security Technical Implementation Guide	2012-11-21

Details

Check Text ( C-WN08-SO-000079_chk )
Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.) Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for "User Account Control: Behavior of the elevation prompt for standard users" is not set to "Prompt for credentials on the secure desktop", this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \Software\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: ConsentPromptBehaviorUser Value Type: REG_DWORD Value: 1

Check Text ( C-WN08-SO-000079_chk )

Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.)
Expand the Security Configuration and Analysis tree view.
Navigate to Local Policies -> Security Options.

If the value for "User Account Control: Behavior of the elevation prompt for standard users" is not set to "Prompt for credentials on the secure desktop", this is a finding.

The policy referenced configures the following registry value:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \Software\Microsoft\Windows\CurrentVersion\Policies\System\

Value Name: ConsentPromptBehaviorUser

Value Type: REG_DWORD
Value: 1

Fix Text (F-WN08-SO-000079_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "User Account Control: Behavior of the elevation prompt for standard users" to "Prompt for credentials on the secure desktop".