Android runs sensitive applications in the so-called "secure world". These trusted applications (TAs) handle sensitive operations such as authentication, key management, or DRM. As they interact with regular Android applications from the normal world, vulnerabilities in these applications compromise the secure world and give adversaries access to privileged data. Our …
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Droidot: Vulnerable Native Libraries on Android
Android is a complex platform with diverse, concurrently running services. Looking at user-space the assumption is that each app is isolated from all others running on top of the rich Android runtime system. Unfortunately, the available system libraries are heavily limited and Android apps often ship diverse libraries. These libraries …
read moreNASS: Fuzzing Native Android System Services
Android is a complex platform with diverse, concurrently running services. In the past, we focused on privileged components such as fuzzing the secure monitor with EL3XIR, targeting trusted applications, or even surveying the use of rollback counters in trusted applications.
As more and more components get secured and hardened, we …
read moreFrom Fuzzing to Frameworks: 2024 Research Highlights
2024 was an active year for the HexHive research group, marked by tireless efforts to enhance the security of various complex systems. A key trend throughout the year was the continued evolution of fuzzing research. Notably, we observed a gradual shift away from general-purpose fuzzing as a primary research focus …
read moreMilkomeda: colliding galaxies or how to repurpose security checks across domains
On one hand, GPUs expose broad functionality for graphics and machine learning workloads, on the other hand, this functionality may be exploited due to large amounts of unvetted code, complex functionality, and the information gap between user-space application, kernel, and the auxiliary GPU. We introduce a novel framework that allows …
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