Sites ability to show pop-ups must be disabled.

Associated with: CCI-000381

SV-57553r2_rule Sites ability to show pop-ups must be disabled.

Vulnerability discussion

Chrome allows you to manage whether unwanted pop-up windows appear. Pop-up windows that are opened when the end user clicks a link are not blocked. If you enable this policy setting, most unwanted pop-up windows are prevented from appearing. If you disable this policy setting, pop-up windows are not prevented from appearing. If you disable this policy setting, scripts can continue to create pop-up windows, and pop-ups that hide other windows. Recommend configuring this setting to ‘2’ to help prevent malicious websites from controlling the pop-up windows or fooling users into clicking on the wrong window. If you do not configure this policy setting, most unwanted pop-up windows are prevented from appearing. If this policy is left not set, 'BlockPopups' will be used and the user will be able to change it. 1 = Allow all sites to show pop-ups 2 = Do not allow any site to show pop-ups

Check content

Universal method: 1. In the omnibox (address bar) type chrome://policy 2. If DefaultPopupsSetting is not displayed under the Policy Name column or it is not set to 2, then this is a finding. Windows method: 1. Start regedit 2. Navigate to HKLM\Software\Policies\Google\Chrome\ 3. If the value name DefaultPopupsSetting does not exist or its value data is not set to 2, then this is a finding.

Fix text

Windows group policy: 1. Open the group policy editor tool with gpedit.msc 2. Navigate to Policy Path: Computer Configuration\Administrative Templates\Google\Google Chrome\Content Settings\ Policy Name: Default popups setting Policy State: Enabled Policy Value: Do not allow any site to show popups

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.