Internet Explorer must be set to disallow users to add/delete sites.

From Internet Explorer 9 Security Technical Implementation Guide

Part of DTBI318 - Addition and deletion of sites

Associated with IA controls: ECSC-1

SV-40553r1_rule Internet Explorer must be set to disallow users to add/delete sites.

Vulnerability discussion

This setting prevents users from adding sites to various security zones. Users should not be able to add sites to different zones, as this could allow them to bypass security controls of the system. If you do not configure this policy setting, users will be able to add or remove sites from the Trusted Sites and Restricted Sites zones at will and change settings in the Local Intranet zone. This configuration could allow sites that host malicious mobile code to be added to these zones, which users could execute.

Check content

Fix text

Set the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Internet Explorer “Security Zones: Do not allow users to add/delete sites” to “Enabled”.

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.