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

From Adobe Acrobat Reader DC Classic Track Security Technical Implementation Guide

Part of SRG-APP-000133

Associated with: CCI-001499

SV-80267r1_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\2015\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\2015\FeatureLockDown Value Name: bDisablePDFHandlerSwitching Type: REG_DWORD Value: 1

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.

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