Plundervolt: Software-based fault injection attacks against intel SGX

Kit Murdock, David Oswald, Flavio D. Garcia, Jo Van Bulck, Daniel Gruss, Frank Piessens

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem Konferenzband

Abstract

Dynamic frequency and voltage scaling features have been introduced to manage ever-growing heat and power consumption in modern processors. Design restrictions ensure frequency and voltage are adjusted as a pair, based on the current load, because for each frequency there is only a certain voltage range where the processor can operate correctly. For this purpose, many processors (including the widespread Intel Core series) expose privileged software interfaces to dynamically regulate processor frequency and operating voltage.In this paper, we demonstrate that these privileged interfaces can be reliably exploited to undermine the system's security. We present the Plundervolt attack, in which a privileged software adversary abuses an undocumented Intel Core voltage scaling interface to corrupt the integrity of Intel SGX enclave computations. Plundervolt carefully controls the processor's supply voltage during an enclave computation, inducing predictable faults within the processor package. Consequently, even Intel SGX's memory encryption/authentication technology cannot protect against Plundervolt. In multiple case studies, we show how the induced faults in enclave computations can be leveraged in real-world attacks to recover keys from cryptographic algorithms (including the AES-NI instruction set extension) or to induce memory safety vulnerabilities into bug-free enclave code. We finally discuss why mitigating Plundervolt is not trivial, requiring trusted computing base recovery through microcode updates or hardware changes.

Originalspracheenglisch
TitelProceedings - 2020 IEEE Symposium on Security and Privacy, SP 2020
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers
Seiten1466-1482
Seitenumfang17
ISBN (elektronisch)9781728134970
DOIs
PublikationsstatusVeröffentlicht - Mai 2020
Veranstaltung41st IEEE Symposium on Security and Privacy - Virtuell, USA / Vereinigte Staaten
Dauer: 18 Mai 202020 Mai 2020

Konferenz

Konferenz41st IEEE Symposium on Security and Privacy
KurztitelSP 2020
LandUSA / Vereinigte Staaten
OrtVirtuell
Zeitraum18/05/2020/05/20

ASJC Scopus subject areas

  • !!Safety, Risk, Reliability and Quality
  • Software
  • !!Computer Networks and Communications

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