Uwe Muller, Eicke Hauck, Timm Welz, Jiska Classen, Matthias Hollick (Secure Mobile Networking Lab, TU Darmstadt)

Even though PowerPC mostly disappeared from the consumer device market, its architectural properties continue being popular for highly specialized systems. This particularly includes embedded systems with real-time requirements that are deeply integrated into critical infrastructures as well as aeronautics, transportation, control systems in power plants, etc. One example is Terrestrial Trunked Radio (TETRA), a digital radio system used in the public safety domain and deployed in more than 120 countries worldwide: base stations of at least one of the main vendors are based on PowerPC. Despite the criticality of the aforementioned systems, many follow a security by obscurity approach and there are no openly available analysis tools. While analyzing a TETRA base station, we design and develop a set of analysis tools centered around a PowerPC binary patcher. We further create various dynamic tooling on top, including a fast memory dumper, function tracer, flexible patching capabilities at runtime, and a fuzzer. We describe the genesis of these tools and detail the binary patcher, which is general in nature and not limited to our base station under test.

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Ryo Ichikawa, Captain of CTF Team TokyoWesterns

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HERA: Hotpatching of Embedded Real-time Applications

Christian Niesler (University of Duisburg-Essen), Sebastian Surminski (University of Duisburg-Essen), Lucas Davi (University of Duisburg-Essen)

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Ovid: Message-based Automatic Contact Tracing

Leonie Reichert and Samuel Brack (Humboldt University of Berlin); Björn Scheuermann (Humboldt-University of Berlin)

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Binary Mutation Analysis of Tests Using Reassembleable Disassembly

Navid Emamdoost (University of Minnesota), Vaibhav Sharma (University of Minnesota), Taejoon Byun (University of Minnesota), Stephen McCamant (University of Minnesota)

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