EFI variables are not supported on this system

Products

• Carbon Black App Control (formerly Cb Protection)

Issue/Introduction

When attempting to import the Public Key for the Linux Agent, the following error is returned when using the command: mokutil --import

EFI variables are not supported on this system

Environment

• App Control Agent: 8.8.0+
• Linux Operating System: All Supported Versions

Cause

This message is returned when the endpoint is configured for Legacy BIOS instead of using UEFI.

Resolution

It may be possible to convert an existing machine from Legacy BIOS to UEFI, but doing so is outside the scope of Carbon Black Support.

Additional Information

To verify whether UEFI or Legacy BIOS is being used issue the command:

test -d /sys/firmware/efi && echo efi || echo bios