Academic Commons

Conference Objects

CLKscrew: Exposing the Perils of Security-Oblivious Energy Management, Usenix 2018 (Distinguished Paper Award)

Tang, Adrian; Sethumadhavan, Simha; Stolfo, Salvatore

The need for power- and energy-efficient computing has resulted in aggressive cooperative hardware-software en- ergy management mechanisms on modern commodity devices. Most systems today, for example, allow soft- ware to control the frequency and voltage of the under- lying hardware at a very fine granularity to extend bat- tery life. Despite their benefits, these software-exposed energy management mechanisms pose grave security im- plications that have not been studied before.
In this work, we present the CLKSCREW attack, a new class of fault attacks that exploit the security- obliviousness of energy management mechanisms to break security. A novel benefit for the attackers is that these fault attacks become more accessible since they can now be conducted without the need for physical access to the devices or fault injection equipment. We demonstrate CLKSCREW on commodity ARM/Android devices. We show that a malicious kernel driver (1) can extract secret cryptographic keys from Trustzone, and (2) can escalate its privileges by loading self-signed code into Trustzone. As the first work to show the security ramifications of energy management mechanisms, we urge the community to re-examine these security-oblivious designs.

Files

  • thumnail for usenix17_clkscrew_atang.pdf usenix17_clkscrew_atang.pdf application/pdf 20.4 MB Download File

Also Published In

Title
Proceedings of the 26th USENIX Security Symposium
Publisher
USENIX Association

More About This Work

Academic Units
Computer Science
Publisher
USENIX Association
Published Here
April 3, 2019
Academic Commons provides global access to research and scholarship produced at Columbia University, Barnard College, Teachers College, Union Theological Seminary and Jewish Theological Seminary. Academic Commons is managed by the Columbia University Libraries.