Internet with Safe Zones for Picture Download must be disabled.

From Microsoft Outlook 2010

Part of DTOO274 - Internet with Safe Zones

SV-33561r2_rule Internet with Safe Zones for Picture Download must be disabled.

Vulnerability discussion

Malicious e-mail senders can send HTML e-mail messages with embedded Web beacons, which are pictures and other content from external servers that can be used to track whether recipients open the messages. Viewing e-mail messages that contain Web beacons provides confirmation that the recipient's e-mail address is valid, which leaves the recipient vulnerable to additional spam and harmful e-mail.By default, Outlook does not download external content in HTML e-mail messages from untrusted senders via the Internet. If this configuration is changed, Outlook will display external content in all HTML e-mail messages received from the Internet, which could include Web beacons.

Check content

The policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Security -> Automatic Picture Download Settings “Include Internet in Safe Zones for Automatic Picture Download” must be set to “Disabled”. Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\14.0\outlook\options\mail Criteria: If the value Internet is REG_DWORD = 0, this is not a finding.

Fix text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Security -> Automatic Picture Download Settings “Include Internet in Safe Zones for Automatic Picture Download” to “Disabled”.

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.