A Firmware Update Architecture for Internet of Things
draft-ietf-suit-architecture-09
SUIT B. Moran
Internet-Draft H. Tschofenig
Intended status: Informational Arm Limited
Expires: November 23, 2020 D. Brown
Linaro
M. Meriac
Consultant
May 22, 2020
A Firmware Update Architecture for Internet of Things
draft-ietf-suit-architecture-09
Abstract
Vulnerabilities with Internet of Things (IoT) devices have raised the
need for a solid and secure firmware update mechanism that is also
suitable for constrained devices. Incorporating such update
mechanism to fix vulnerabilities, to update configuration settings as
well as adding new functionality is recommended by security experts.
This document lists requirements and describes an architecture for a
firmware update mechanism suitable for IoT devices. The architecture
is agnostic to the transport of the firmware images and associated
meta-data.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on November 23, 2020.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Moran, et al. Expires November 23, 2020 [Page 1]
Internet-Draft A Firmware Update Architecture for IoT May 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions and Terminology . . . . . . . . . . . . . . . . . 4
3. Requirements . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1. Agnostic to how firmware images are distributed . . . . . 8
3.2. Friendly to broadcast delivery . . . . . . . . . . . . . 8
3.3. Use state-of-the-art security mechanisms . . . . . . . . 8
3.4. Rollback attacks must be prevented . . . . . . . . . . . 9
3.5. High reliability . . . . . . . . . . . . . . . . . . . . 9
3.6. Operate with a small bootloader . . . . . . . . . . . . . 9
3.7. Small Parsers . . . . . . . . . . . . . . . . . . . . . . 10
3.8. Minimal impact on existing firmware formats . . . . . . . 10
3.9. Robust permissions . . . . . . . . . . . . . . . . . . . 10
3.10. Operating modes . . . . . . . . . . . . . . . . . . . . . 11
3.11. Suitability to software and personalization data . . . . 13
4. Claims . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5. Communication Architecture . . . . . . . . . . . . . . . . . 14
6. Manifest . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7. Device Firmware Update Examples . . . . . . . . . . . . . . . 19
7.1. Single CPU SoC . . . . . . . . . . . . . . . . . . . . . 19
7.2. Single CPU with Secure - Normal Mode Partitioning . . . . 19
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