Abstract
We describe an approach to control-flow integrity protection for real-time systems. We present TrackOS, a security-aware real-time operating system. TrackOS checks a task’s control stack against a statically-generated call graph, generated by an abstract interpretation-based tool that requires no source code. The monitoring is done from a dedicated task, the schedule of which is controlled by the real-time operating system scheduler. Finally, we implement a version of software-based attestation (SWATT) to ensure program-data integrity to strengthen our control-flow integrity checks. We demonstrate the feasibility of our approach by monitoring an open source autopilot in flight.
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Acknowledgments
This work is supported in part by Air Force contract FA8650-11-C-1003. All findings herein are the authors’ alone. Pat Hickey performed the work while at Galois, Inc.
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Pike, L., Hickey, P., Elliott, T., Mertens, E., Tomb, A. (2016). TrackOS: A Security-Aware Real-Time Operating System. In: Falcone, Y., Sánchez, C. (eds) Runtime Verification. RV 2016. Lecture Notes in Computer Science(), vol 10012. Springer, Cham. https://doi.org/10.1007/978-3-319-46982-9_19
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DOI: https://doi.org/10.1007/978-3-319-46982-9_19
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