Scripted Window Security must be enforced.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-70993	DTOO124	SV-85617r1_rule		Medium

Description
Malicious websites often try to confuse or trick users into giving a site permission to perform an action allowing the site to take control of the users' computers in some manner. Disabling or not configuring this setting allows unknown websites to: -Create browser windows appearing to be from the local operating system. -Draw active windows displaying outside of the viewable areas of the screen capturing keyboard input. -Overlay parent windows with their own browser windows to hide important system information, choices or prompts.

Description

Malicious websites often try to confuse or trick users into giving a site permission to perform an action allowing the site to take control of the users' computers in some manner. Disabling or not configuring this setting allows unknown websites to: -Create browser windows appearing to be from the local operating system. -Draw active windows displaying outside of the viewable areas of the screen capturing keyboard input. -Overlay parent windows with their own browser windows to hide important system information, choices or prompts.

STIG	Date
Microsoft Excel 2016 Security Technical Implementation Guide	2017-09-19

Details

Check Text ( C-71421r3_chk )
Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Scripted Window Security Restrictions" is set to "Enabled" and 'excel.exe' is checked. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_WINDOW_RESTRICTIONS Criteria: If the value excel.exe is REG_DWORD = 1, this is not a finding.

Check Text ( C-71421r3_chk )

Verify the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Scripted Window Security Restrictions" is set to "Enabled" and 'excel.exe' is checked.

Procedure: Use the Windows Registry Editor to navigate to the following key:

HKLM\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_WINDOW_RESTRICTIONS

Criteria: If the value excel.exe is REG_DWORD = 1, this is not a finding.

Fix Text (F-77325r2_fix)
Set the policy value for Computer Configuration -> Administrative Templates -> Microsoft Office 2016 (Machine) -> Security Settings -> IE Security "Scripted Window Security Restrictions" to "Enabled" and place a check in the 'excel.exe' check box.