Vector markup Language (VML) for displaying graphics in browsers must be disallowed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17773	DTOO180 - Office System	SV-33479r1_rule		Medium

Description
When saving documents as Web pages, Excel, PowerPoint, and Word can save vector–based graphics in Vector Markup Language (VML), which enables Internet Explorer to display them smoothly at any resolution. By default, when saving VML graphics, Office applications also save copies of the graphics in a standard raster file format (GIF or PNG) for use by browsers that cannot display VML. If the Rely on VML for displaying graphics in browsers check box in the Web Options dialog box is selected, applications will not save raster copies of VML graphics, which means those graphics will not display in non-Microsoft browsers.

Description

When saving documents as Web pages, Excel, PowerPoint, and Word can save vector–based graphics in Vector Markup Language (VML), which enables Internet Explorer to display them smoothly at any resolution. By default, when saving VML graphics, Office applications also save copies of the graphics in a standard raster file format (GIF or PNG) for use by browsers that cannot display VML. If the Rely on VML for displaying graphics in browsers check box in the Web Options dialog box is selected, applications will not save raster copies of VML graphics, which means those graphics will not display in non-Microsoft browsers.

STIG	Date
Microsoft Office System 2010 STIG	2018-04-04

Details

Check Text ( C-33962r1_chk )
The policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Tools \ Options \ General \ Web Options -> Browsers “Rely on VML for displaying graphics in browsers” must be set to “Disabled”. Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\14.0\common\internet Criteria: If the value RelyOnVML is REG_DWORD = 0, this is not a finding.

Check Text ( C-33962r1_chk )

The policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Tools \ Options \ General \ Web Options -> Browsers “Rely on VML for displaying graphics in browsers” must be set to “Disabled”.

Procedure: Use the Windows Registry Editor to navigate to the following key:

HKCU\Software\Policies\Microsoft\Office\14.0\common\internet

Criteria: If the value RelyOnVML is REG_DWORD = 0, this is not a finding.

Fix Text (F-29651r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Tools \ Options \ General \ Web Options -> Browsers “Rely on VML for displaying graphics in browsers” to “Disabled”.