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

Files from Internet zone must be opened in Excel in Protected View mode.

DISA Rule

SV-223340r508019_rule

Vulnerability Number

V-223340

Group Title

SRG-APP-000207

Rule Version

O365-EX-000031

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Set policy value for User Configuration >> Administrative Templates >> Microsoft Excel 2016 >> Excel Options >> Security >> Trust Center >> Protected View >> Do not open files from the Internet zone in Protected View to "Disabled".

Check Contents

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Excel 2016 >> Excel Options >> Security >> Trust Center >> Protected View >> Do not open files from the Internet zone in Protected View is set to "Disabled".

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

HKCU\software\policies\microsoft\office\16.0\excel\security\protectedview

If the value DisableInternetFilesInPV is REG_DWORD = 0, this is not a finding.

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

If the value is REG_DWORD = 1, this is a finding.

Vulnerability Number

V-223340

Documentable

False

Rule Version

O365-EX-000031

Severity Override Guidance

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Excel 2016 >> Excel Options >> Security >> Trust Center >> Protected View >> Do not open files from the Internet zone in Protected View is set to "Disabled".

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

HKCU\software\policies\microsoft\office\16.0\excel\security\protectedview

If the value DisableInternetFilesInPV is REG_DWORD = 0, this is not a finding.

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

If the value is REG_DWORD = 1, this is a finding.

Check Content Reference

M

Target Key

4099

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