• Journal of the Korea Institute of Information Security & Cryptology
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• v.32 no.6
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• pp.1121-1125
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• 2022

HAL-Fuzz, a fuzzing technique to find firmware vulnerabilities, is efficient by using the HAL function of the hardware abstraction layer provided by MCU vendors. However, it cannot handle most firmware that unused the exact HAL function. In this paper, we propose a new method for identifying pseudo-HAL functions to increase the fuzzing availability of HAL-Fuzz. In experiments, we identified not only the HAL but also the pseudo-HAL functions, implemented by the developer, and that fuzzing is possible.