Automatic download of Internet Calendar appointment attachments must be disallowed.

From Microsoft Outlook 2010

Part of DTOO284 - Auto download attachments Internet Cal

SV-33496r1_rule Automatic download of Internet Calendar appointment attachments must be disallowed.

Vulnerability discussion

Files attached to Internet Calendar appointments could contain malicious code that could be used to compromise a computer. By default, Outlook does not download attachments when retrieving Internet Calendar appointments.

Check content

The policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Account Settings -> Internet Calendars “Automatically download attachments” 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\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 2010 -> Account Settings -> Internet Calendars “Automatically download attachments” to “Disabled”.

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