International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 26 August 2015

Syed Kamran Haider, Masab Ahmad, Farrukh Hijaz, Astha Patni, Ethan Johnson, Matthew Seita, Omer Khan
ePrint Report ePrint Report
The challenges faced in securing embedded computing systems against multifaceted memory safety vulnerabilities have prompted great interest in the development of memory safety countermeasures. These countermeasures either provide protection only against their corresponding type of vulnerabilities, or incur substantial architectural modifications and overheads in order to provide complete safety, which makes them infeasible for embedded systems. In this paper, we propose M-MAP: a comprehensive system based on multi-factor memory authentication for complete memory safety, inspired by everyday user authentication factors. We examine certain crucial theoretical and practical implications of composing memory integrity verification and bounds checking protection schemes in a comprehensive system. Based on these implications, we implement M-MAP with hardware based memory integrity verification and software based bounds checking to achieve a balance between hardware modifications and performance. We demonstrate that M-MAP implemented on top of a lightweight out-of-order processor delivers complete memory safety with only $32\\%$ performance overhead on average, and incurs minimal hardware modifications and area overhead.

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