STIGQter: STIG Summary: Microsoft Outlook 2016 Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Oct 2020:

Trusted add-ins behavior for email must be configured.

DISA Rule

SV-228451r508021_rule

Vulnerability Number

V-228451

Group Title

SRG-APP-000516

Rule Version

DTOO256

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security -> Security Form Settings -> Programmatic Security -> Trusted Add-ins "Configure trusted add-ins" to "Disabled".

Check Contents

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security -> Security Form Settings -> Programmatic Security -> Trusted Add-ins "Configure trusted add-ins" is set to "Disabled".

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

HKCU\Software\Policies\Microsoft\Office\16.0\Outlook\security

Criteria: If the value trustedaddins does not exist, this is not a finding. If the value trustedaddins exists, but with no entries, this is not a finding.
If the value trustedaddins exists, with entries, this is a finding.

In some reported configurations, the value remains after disabling the setting but the value is empty.

Vulnerability Number

V-228451

Documentable

False

Rule Version

DTOO256

Severity Override Guidance

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security -> Security Form Settings -> Programmatic Security -> Trusted Add-ins "Configure trusted add-ins" is set to "Disabled".

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

HKCU\Software\Policies\Microsoft\Office\16.0\Outlook\security

Criteria: If the value trustedaddins does not exist, this is not a finding. If the value trustedaddins exists, but with no entries, this is not a finding.
If the value trustedaddins exists, with entries, this is a finding.

In some reported configurations, the value remains after disabling the setting but the value is empty.

Check Content Reference

M

Target Key

4224

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