Title

Document behavior if file validation fails must be set. (Cat II impact)

Discussion

This policy key controls the behavior of how Office documents should be handled when failing File Validation. The options available are: -Block files completely. This will prevent users from opening files. -Open files in Protected View and disallow edit. This will prevent users from editing the files. -Open files in Protected view and allow edit. This will allow users to edit the files. If disabling or not configuring this policy setting, the default setting will be, "open files in protected view and allow edit".

Check Content

The policy value for User Configuration -> Administrative Templates -> Microsoft Excel 2010 -> Excel Options -> Security -> Trust Center -> Protected View “Set document behavior if file validation fails” must be "Enabled: Open in Protected View" and Unchecked for "Do not allow edit". Procedure: Use the Windows Registry Editor to navigate to the following keys: HKCU\Software\Policies\Microsoft\Office\14.0\excel\security\filevalidation Criteria: If the value OpenInProtectedView is REG_DWORD = 1, this is not a finding. AND HKCU\Software\Policies\Microsoft\Office\14.0\excel\security\filevalidation Criteria: If the value DisableEditFromPV is REG_DWORD = 1, this is not a finding.

Fix Text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Excel 2010 -> Excel Options -> Security -> Trust Center -> Protected View “Set document behavior if file validation fails” to "Enabled: Open in Protected View" and Unchecked for "Do not allow edit".

Additional Identifiers

Rule ID: SV-33867r1_rule

Vulnerability ID: V-26616

Group Title: DTOO292 - Set document behavior

Expert Comments

CCIs tied to check.

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