Firmware Updates for Internet of Things Devices - An Information Model for Manifests
draft-ietf-suit-information-model-01
SUIT B. Moran
Internet-Draft H. Tschofenig
Intended status: Standards Track Arm Limited
Expires: January 3, 2019 H. Birkholz
Fraunhofer SIT
July 02, 2018
Firmware Updates for Internet of Things Devices - An Information Model
for Manifests
draft-ietf-suit-information-model-01
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.
One component of such a firmware update is the meta-data, or
manifest, that describes the firmware image(s) and offers appropriate
protection. This document describes all the information that must be
present in the manifest.
Status of This Memo
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This Internet-Draft will expire on January 3, 2019.
Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the
document authors. All rights reserved.
Moran, et al. Expires January 3, 2019 [Page 1]
Internet-Draft A Firmware Manifest Information Model July 2018
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Conventions and Terminology . . . . . . . . . . . . . . . . . 5
3. Motivation for Manifest Fields . . . . . . . . . . . . . . . 5
3.1. Threat Model . . . . . . . . . . . . . . . . . . . . . . 5
3.2. Threat Descriptions . . . . . . . . . . . . . . . . . . . 6
3.2.1. Threat MFT1: Old Firmware . . . . . . . . . . . . . . 6
3.2.2. Threat MFT2: Mismatched Firmware . . . . . . . . . . 6
3.2.3. Threat MFT3: Offline device + Old Firmware . . . . . 7
3.2.4. Threat MFT4: The target device misinterprets the type
of payload . . . . . . . . . . . . . . . . . . . . . 7
3.2.5. Threat MFT5: The target device installs the payload
to the wrong location . . . . . . . . . . . . . . . . 7
3.2.6. Threat MFT6: Redirection . . . . . . . . . . . . . . 8
3.2.7. Threat MFT7: Payload Verification on Boot . . . . . . 8
3.2.8. Threat MFT8: Unauthenticated Updates . . . . . . . . 8
3.2.9. Threat MFT9: Unexpected Precursor images . . . . . . 8
3.2.10. Threat MFT10: Unqualified Firmware . . . . . . . . . 9
3.2.11. Threat MFT11: Reverse Engineering Of Firmware Image
for Vulnerability Analysis . . . . . . . . . . . . . 10
3.2.12. Threat MFT12: Overriding Critical Manifest Elements . 10
3.3. Security Requirements . . . . . . . . . . . . . . . . . . 11
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