STIGQter: STIG Summary: Microsoft Office 365 ProPlus Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 23 Apr 2021:

If file validation fails, files must be opened in Protected view in Word with ability to edit disabled.

DISA Rule

SV-223404r508019_rule

Vulnerability Number

V-223404

Group Title

SRG-APP-000207

Rule Version

O365-WD-000005

Severity

CAT II

CCI(s)

• CCI-001662 - The information system takes organization-defined corrective action when organization-defined unacceptable mobile code is identified.

Weight

10

Fix Recommendation

Set the policy value for User Configuration >> Administrative Templates >> Microsoft Word 2016 >> Word Options >> Security >> Trust Center >> Protected View >> Set document behavior if file validation fails to "Enabled: Open in Protected View".

Uncheck the "Allow edit" check box.

Check Contents

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Word 2016 >> Word Options >> Security >> Trust Center >> Protected View >> Set document behavior if file validation fails is set to "Enabled: Open in Protected View". Verify the check box for "Allow edit" is not selected.

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

HKCU\Software\Policies\Microsoft\Office\16.0\Word\security\filevalidation

If the value openinprotectedview does not exist, this is not a finding.

If both the value for openinprotectedview is REG_DWORD = 1 and the value for DisableEditFromPV is set to REG_DWORD = 1, this is not a finding.

Vulnerability Number

V-223404

Documentable

False

Rule Version

O365-WD-000005

Severity Override Guidance

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Word 2016 >> Word Options >> Security >> Trust Center >> Protected View >> Set document behavior if file validation fails is set to "Enabled: Open in Protected View". Verify the check box for "Allow edit" is not selected.

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

HKCU\Software\Policies\Microsoft\Office\16.0\Word\security\filevalidation

If the value openinprotectedview does not exist, this is not a finding.

If both the value for openinprotectedview is REG_DWORD = 1 and the value for DisableEditFromPV is set to REG_DWORD = 1, this is not a finding.

Check Content Reference

M

Target Key

4099

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