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os_external_storage_access_defined Access to External Storage Must Be Defined

NIST macOS Security Compliance Project Sequoia Guidance, Revision 4.0 (be5491f)
All changes in this version
first version loaded macOS

Title

Access to External Storage Must Be Defined

Control

/usr/bin/plutil -convert json /var/db/ManagedConfigurationFiles/DiskManagement/DiskManagement_Settings.plist -o - | /usr/bin/jq --raw-output '.Restrictions.ExternalStorage'

Discussion

Access to external storage _MUST_ be managed.

NOTE: Apple's built in method using declative device management method only allows you to set external storage manament to Allowed, ReadOnly, and Disallowed.

Related controls

mp-7

Fix

This is implemented by Declarative Device Management (DDM).