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

Users customizing attachment security settings must be prevented.

DISA Rule

SV-228438r508021_rule

Vulnerability Number

V-228438

Group Title

SRG-APP-000210

Rule Version

DTOO238

Severity

CAT II

CCI(s)

• CCI-001170 - The information system prevents the automatic execution of mobile code in organization-defined software applications.

Weight

10

Fix Recommendation

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security "Prevent users from customizing attachment security settings" to "Enabled".

Check Contents

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security "Prevent users from customizing attachment security settings" is set to "Enabled".

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

HKCU\Software\Policies\Microsoft\Office\16.0\outlook

Criteria: If the value DisallowAttachmentCustomization is REG_DWORD = 1, this is not a finding.

Vulnerability Number

V-228438

Documentable

False

Rule Version

DTOO238

Severity Override Guidance

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security "Prevent users from customizing attachment security settings" is set to "Enabled".

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

HKCU\Software\Policies\Microsoft\Office\16.0\outlook

Criteria: If the value DisallowAttachmentCustomization is REG_DWORD = 1, this is not a finding.

Check Content Reference

M

Target Key

4224

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