Scripting of Internet Explorer WebBrowser Control must be disallowed (Restricted Sites zone).

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-46883	DTBI850-IE11	SV-59749r1_rule	ECSC-1	Medium

Description
This policy setting controls whether a page may control embedded WebBrowser Control via script. Scripted code hosted on sites located in this zone is more likely to contain malicious code. If you enable this policy setting, script access to the WebBrowser Control is allowed. If you disable this policy setting, script access to the WebBrowser Control is not allowed. If you do not configure this policy setting, script access to the WebBrowser Control can be enabled or disabled by the user. By default, script access to the WebBrowser Control is only allowed in the Local Machine and Intranet Zones.

Description

This policy setting controls whether a page may control embedded WebBrowser Control via script. Scripted code hosted on sites located in this zone is more likely to contain malicious code. If you enable this policy setting, script access to the WebBrowser Control is allowed. If you disable this policy setting, script access to the WebBrowser Control is not allowed. If you do not configure this policy setting, script access to the WebBrowser Control can be enabled or disabled by the user. By default, script access to the WebBrowser Control is only allowed in the Local Machine and Intranet Zones.

STIG	Date
Microsoft Internet Explorer 11 Security Technical Implementation Guide	2017-12-12

Details

Check Text ( C-49943r2_chk )
The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Restricted Sites Zone -> 'Allow scripting of Internet Explorer WebBrowser controls' must be 'Enabled', and 'Disable' selected from the drop-down box. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4 Criteria: If the value "1206" is REG_DWORD = 3, this is not a finding.

Check Text ( C-49943r2_chk )

The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Restricted Sites Zone -> 'Allow scripting of Internet Explorer WebBrowser controls' must be 'Enabled', and 'Disable' selected from the drop-down box. Procedure: Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4 Criteria: If the value "1206" is REG_DWORD = 3, this is not a finding.

Fix Text (F-50621r1_fix)
Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Restricted Sites Zone -> 'Allow scripting of Internet Explorer WebBrowser controls' to 'Enabled', and select 'Disable' from the drop-down box.