Title

Automatic download of Internet Calendar appointment attachments must be disallowed. (Cat II impact)

Discussion

This policy setting controls whether Outlook downloads files attached to Internet Calendar appointments. If you enable this policy setting, Outlook automatically downloads all Internet Calendar appointment attachments. If you disable or do not configure this policy setting, Outlook does not download attachments when retrieving Internet Calendar appointments.

Check Content

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Account Settings -> Internet Calendars "Automatically download attachments" is set to "Disabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\16.0\outlook\options\webcal Criteria: If the value EnableAttachments is REG_DWORD = 0, this is not a finding.

Fix Text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Account Settings -> Internet Calendars "Automatically download attachments" to "Disabled".

Additional Identifiers

Rule ID: SV-228469r508021_rule

Vulnerability ID: V-228469

Group Title: SRG-APP-000209

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.