UCF STIG Viewer Logo

Adobe Acrobat Pro DC Classic PDF file attachments must be blocked.


Overview

Finding ID Version Rule ID IA Controls Severity
V-80115 AADC-CL-000275 SV-94819r1_rule Medium
Description
Acrobat Pro allows for files to be attached to PDF documents. Attachments represent a potential security risk because they can contain malicious content, open other dangerous files, or launch applications.This feature prevents users from opening or launching file types other than PDF or FDF and disables the menu option to re-enable.
STIG Date
Adobe Acrobat Professional DC Classic Security Technical Implementation Guide 2019-07-01

Details

Check Text ( C-79783r1_chk )
Verify the following registry configuration:

Utilizing the Registry Editor, navigate to the following: HKEY_LOCAL_MACHINE\Software\Policies\Adobe\Adobe Acrobat\2015\FeatureLockDown

Value Name: iFileAttachmentPerms
Type: REG_DWORD
Value: 1

If the value for iFileAttachmentPerms is not set to "1" and Type is not configured to REG_DWORD or does not exist, this is a finding.

GUI path: Edit > Preferences > Trust Manager > In the 'PDF File Attachments' section > Verify 'Allow opening of non-PDF file attachments with external applications' checkbox is unchecked and greyed out (locked). If the box is checked and not greyed out (locked), this is a finding.

Admin Template path: Computer Configuration > Administrative Templates > Adobe Acrobat Pro DC Classic > Preferences > Trust Manager > 'Allow opening of non-PDF file attachments with external applications' must be set to 'Disabled'.

This policy setting requires the installation of the AcrobatProDCClassic custom templates included with the STIG package. "AcrobatProDCClassic.admx" and "AcrobatProDCClassic.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.
Fix Text (F-86921r1_fix)
Configure the following registry value:

Registry Hive:
HKEY_LOCAL_MACHINE
Registry Path:
\Software\Policies\Adobe\Adobe Acrobat\2015\FeatureLockDown

Value Name: iFileAttachmentPerms
Type: REG_DWORD
Value: 1

Configure the policy value for Computer Configuration > Administrative Templates > Adobe Acrobat Pro DC Classic > Preferences > Trust Manager > 'Allow opening of non-PDF file attachments with external applications' to 'Disabled'.

This policy setting requires the installation of the AcrobatProDCClassic custom templates included with the STIG package. "AcrobatProDCClassic.admx" and "AcrobatProDCClassic.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.