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

Consistent MIME handling must be enabled for all Office 365 ProPlus programs.

DISA Rule

SV-223297r508019_rule

Vulnerability Number

V-223297

Group Title

SRG-APP-000179

Rule Version

O365-CO-000015

Severity

CAT II

CCI(s)

• CCI-000803 - The information system implements mechanisms for authentication to a cryptographic module that meet the requirements of applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance for such authentication.

Weight

10

Fix Recommendation

Set the policy value for Computer Configuration >> Administrative Templates >> Microsoft Office 2016 (Machine) >> Security Settings >> IE Security "Consistent Mime Handling" to "Enabled" and select the check boxes for all installed Office programs.

Check Contents

Verify the policy value for Computer Configuration >> Administrative Templates >> Microsoft Office 2016 (Machine) >> Security Settings >> IE Security >> Consistent Mime Handling is set to "Enabled" and the check box is selected for every installed Office program.

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

HKLM\software\microsoft\internet explorer\main\featurecontrol\feature_mime_handling

If the value for all installed Office programs is set to "True", this is not a finding.

Vulnerability Number

V-223297

Documentable

False

Rule Version

O365-CO-000015

Severity Override Guidance

Verify the policy value for Computer Configuration >> Administrative Templates >> Microsoft Office 2016 (Machine) >> Security Settings >> IE Security >> Consistent Mime Handling is set to "Enabled" and the check box is selected for every installed Office program.

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

HKLM\software\microsoft\internet explorer\main\featurecontrol\feature_mime_handling

If the value for all installed Office programs is set to "True", this is not a finding.

Check Content Reference

M

Target Key

4099

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