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

Users must be prevented from creating new trusted locations in the Trust Center.

DISA Rule

SV-223293r508019_rule

Vulnerability Number

V-223293

Group Title

SRG-APP-000340

Rule Version

O365-CO-000010

Severity

CAT II

CCI(s)

• CCI-002235 - The information system prevents non-privileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures.

Weight

10

Fix Recommendation

Set the policy value for User Configuration >> Administrative Templates >> Microsoft Office 2016 >> Security Settings >> Trust Center >> Allow mix of policy and user locations to "Disabled".

Check Contents

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Office 2016\Security Settings\Trust Center >> Allow mix of policy and user locations is set to "Disabled".

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

HKCU\software\policies\microsoft\office\16.0\common\security\trusted locations

If the value for allow user locations is set to REG_DWORD = 0, this is not a finding.

Vulnerability Number

V-223293

Documentable

False

Rule Version

O365-CO-000010

Severity Override Guidance

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Office 2016\Security Settings\Trust Center >> Allow mix of policy and user locations is set to "Disabled".

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

HKCU\software\policies\microsoft\office\16.0\common\security\trusted locations

If the value for allow user locations is set to REG_DWORD = 0, this is not a finding.

Check Content Reference

M

Target Key

4099

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