Adobe Acrobat Pro DC Classic privileged site locations must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-80157	AADC-CL-001330	SV-94861r1_rule		Medium

Description
Privileged Locations are the primary method Acrobat uses to allow users and admins to specify trusted content that should be exempt from security restrictions, such as when Enhanced Security is enabled. A Privileged Location may be a file, folder, or a host. If the user is allowed to set a Privileged Location, they could bypass security protections.

STIG	Date
Adobe Acrobat Professional DC Classic Security Technical Implementation Guide	2019-03-18

Details

Check Text ( C-79825r2_chk )
Verify the following registry configuration: Using the Registry Editor, navigate to the following: HKEY_LOCAL_MACHINE\Software\Policies\Adobe\Adobe Acrobat\2015\FeatureLockDown Value Name: bDisableOSTrustedSites Type: REG_DWORD Value: 1 If the value for bDisableOSTrustedSites 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 > Security (Enhanced) > In the 'Privileged Locations' section, verify 'Automatically trust sites from my Win OS security zones' option is unchecked and greyed out (locked). If this box is checked and not greyed out, this is a finding. Admin Template path: Computer Configuration > Administrative Templates > Adobe Acrobat Pro DC Classic > Preferences > Security (Enhanced) > Automatically trust sites from my Win OS security zones' 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.

Check Text ( C-79825r2_chk )

Verify the following registry configuration:

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

Value Name: bDisableOSTrustedSites
Type: REG_DWORD
Value: 1

If the value for bDisableOSTrustedSites 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 > Security (Enhanced) > In the 'Privileged Locations' section, verify 'Automatically trust sites from my Win OS security zones' option is unchecked and greyed out (locked). If this box is checked and not greyed out, this is a finding.

Admin Template path: Computer Configuration > Administrative Templates > Adobe Acrobat Pro DC Classic > Preferences > Security (Enhanced) > Automatically trust sites from my Win OS security zones' 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-86963r2_fix)
Configure the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \Software\Policies\Adobe\Adobe Acrobat\2015\FeatureLockDown Value Name: bDisableOSTrustedSites Type: REG_DWORD Value: 1 Configure the policy value for Computer Configuration > Administrative Templates > Adobe Acrobat Pro DC Classic > Preferences > Security (Enhanced) > Automatically trust sites from my Win OS security zones' 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-86963r2_fix)

Configure the following registry value:

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

Value Name: bDisableOSTrustedSites
Type: REG_DWORD
Value: 1

Configure the policy value for Computer Configuration > Administrative Templates > Adobe Acrobat Pro DC Classic > Preferences > Security (Enhanced) > Automatically trust sites from my Win OS security zones' 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.