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


Overview

Finding ID Version Rule ID IA Controls Severity
V-213176 ARDC-CN-000050 SV-213176r395850_rule Low
Description
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.
STIG Date
Adobe Acrobat Reader DC Continuous Track Security Technical Implementation Guide 2021-06-22

Details

Check Text ( C-14411r276746_chk )
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 (F-14409r276747_fix)
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