Adobe Reader DC must disable the ability to change the Default Handler.

From Adobe Acrobat Reader DC Continuous Track Security Technical Implementation Guide

Associated with: CCI-001499

SV-79425r1_rule Adobe Reader DC must disable the ability to change the Default Handler.

Vulnerability discussion

Allowing user to make changes to an application case cause a security risk.When the Default PDF Handler is disabled, the end users will not be able to change the default PDF viewer.

Check content

Verify the following registry configuration: Utilizing the Registry Editor, navigate to the following: HKEY_LOCAL_MACHINE\Software\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown Value Name: bDisablePDFHandlerSwitching Type: REG_DWORD Value: 1 If the value for bDisablePDFHandlerSwitching is not set to “1” and Type configured to REG_DWORD or does not exist, then this is a finding.

Fix text

Configure the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \Software\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown Value Name: bDisablePDFHandlerSwitching Type: REG_DWORD Value: 1

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