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2018 IEEE Symposium on Security and Privacy (SP) (2018)
San Francisco, CA, US
May 21, 2018 to May 23, 2018
ISSN: 2375-1207
ISBN: 978-1-5386-4353-2
pp: 613-628
Jing Tian , University of Florida
Nolen Scaife , University of Florida
Deepak Kumar , University of Illinois at Urbana-Champaign
Michael Bailey , University of Illinois at Urbana-Champaign
Adam Bates , University of Illinois at Urbana-Champaign
Kevin Butler , University of Florida
ABSTRACT
USB-based attacks have increased in complexity in recent years. Modern attacks now incorporate a wide range of attack vectors, from social engineering to signal injection. To address these challenges, the security community has responded with a growing set of fragmented defenses. In this work, we survey and categorize USB attacks and defenses, unifying observations from both peer-reviewed research and industry. Our systematization extracts offensive and defensive primitives that operate across layers of communication within the USB ecosystem. Based on our taxonomy, we discover that USB attacks often abuse the trust-by-default nature of the ecosystem, and transcend different layers within a software stack; none of the existing defenses provide a complete solution, and solutions expanding multiple layers are most effective. We then develop the first formal verification of the recently released USB Type- C Authentication specification, and uncover fundamental flaws in the specification's design. Based on the findings from our systematization, we observe that while the spec has successfully pinpointed an urgent need to solve the USB security problem, its flaws render these goals unattainable. We conclude by outlining future research directions to ensure a safer computing experience with USB.
INDEX TERMS
USB, Security, Type-C
CITATION

J. Tian, N. Scaife, D. Kumar, M. Bailey, A. Bates and K. Butler, "SoK: "Plug & Pray" Today - Understanding USB Insecurity in Versions 1 through C," 2018 IEEE Symposium on Security and Privacy (SP), San Francisco, CA, US, , pp. 613-628.
doi:10.1109/SP.2018.00037
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