Cross-Site Scripting Filter must be enforced (Internet zone).

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-46879	DTBI840-IE11	SV-59745r1_rule	ECSC-1	Medium

Description
The Cross-Site Scripting Filter is designed to prevent users from becoming victims of unintentional information disclosure. This setting controls if the Cross-Site Scripting (XSS) Filter detects and prevents cross-site script injection into websites in this zone. If you enable this policy setting, the XSS Filter will be enabled for sites in this zone, and the XSS Filter will attempt to block cross-site script injections. If you disable this policy setting, the XSS Filter will be disabled for sites in this zone, and Internet Explorer will permit cross-site script injections.

Description

The Cross-Site Scripting Filter is designed to prevent users from becoming victims of unintentional information disclosure. This setting controls if the Cross-Site Scripting (XSS) Filter detects and prevents cross-site script injection into websites in this zone. If you enable this policy setting, the XSS Filter will be enabled for sites in this zone, and the XSS Filter will attempt to block cross-site script injections. If you disable this policy setting, the XSS Filter will be disabled for sites in this zone, and Internet Explorer will permit cross-site script injections.

STIG	Date
Microsoft Internet Explorer 11 Security Technical Implementation Guide	2015-03-26

Details

Check Text ( C-49941r2_chk )
The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Internet Zone -> 'Turn on Cross-Site Scripting Filter' must be 'Enabled', and 'Enable' 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\3 Criteria: If the value "1409" is REG_DWORD = 0, this is not a finding.

Check Text ( C-49941r2_chk )

The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Internet Zone -> 'Turn on Cross-Site Scripting Filter' must be 'Enabled', and 'Enable' 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\3 Criteria: If the value "1409" is REG_DWORD = 0, this is not a finding.

Fix Text (F-50615r1_fix)
Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Internet Zone -> 'Turn on Cross-Site Scripting Filter' to 'Enabled', and select 'Enable' from the drop-down box.