Installation of desktop items must be disallowed (Restricted Sites zone).

From Microsoft Internet Explorer 10 Security Technical Implementation Guide

Part of DTBI127-Installation of desktop items - Restricted

SV-45216r1_rule Installation of desktop items must be disallowed (Restricted Sites zone).

Vulnerability discussion

Active Desktop items could contain links to unauthorized websites or other undesirable content. It is prudent to prevent users from installing desktop items from this security zone. Installation of items must have a level of protection based upon the site being accessed. This policy setting allows you to manage whether users can install Active Desktop items from this zone.

Check content

The policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Restricted Sites Zone -> "Allow installation of desktop items" 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 1800 is REG_DWORD = 3, this is not a finding.

Fix text

Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer -> Internet Control Panel -> Security Page -> Restricted Sites Zone -> "Allow installation of desktop items" to "Enabled", and select "Disable" from the drop-down box.

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.