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

Unsigned add-ins in PowerPoint must be blocked with no Trust Bar Notification to the user.

DISA Rule

SV-223384r508019_rule

Vulnerability Number

V-223384

Group Title

SRG-APP-000131

Rule Version

O365-PT-000008

Severity

CAT II

CCI(s)

• CCI-001749 - The information system prevents the installation of organization-defined software components without verification the software component has been digitally signed using a certificate that is recognized and approved by the organization.

Weight

10

Fix Recommendation

Set the policy value for User Configuration >> Administrative Templates >> Microsoft PowerPoint 2016 >> PowerPoint Options >> Security >> Trust Center "Disable Trust Bar Notification for unsigned application add-ins and block them" to "Enabled".

Check Contents

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft PowerPoint 2016 >> PowerPoint Options >> Security >> Trust Center "Disable Trust Bar Notification for unsigned application add-ins and block them" is set to "Enabled".

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

HKCU\software\policies\Microsoft\office\16.0\powerpoint\security

If the value notbpromptunsignedaddin is REG_DWORD = 1, this is not a finding.

Vulnerability Number

V-223384

Documentable

False

Rule Version

O365-PT-000008

Severity Override Guidance

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft PowerPoint 2016 >> PowerPoint Options >> Security >> Trust Center "Disable Trust Bar Notification for unsigned application add-ins and block them" is set to "Enabled".

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

HKCU\software\policies\Microsoft\office\16.0\powerpoint\security

If the value notbpromptunsignedaddin is REG_DWORD = 1, this is not a finding.

Check Content Reference

M

Target Key

4099

Comments