Increasing complexity and connectivity of modern vehicles have heightened their vulnerability to cyberattacks. This paper addresses security challenges associated with the Unified Diagnostic Services (UDS) protocol, a critical communication framework for vehicle diagnostics in the automotive industry. We present security monitoring strategies for the UDS protocol that leverage in-vehicle logging and remote analysis through a Vehicle Security Operations Center (VSOC). Our approach involves specifying security event logging requirements, contextual data collection, and the development of detection strategies aimed at identifying UDS attack scenarios. By applying these strategies to a comprehensive taxonomy of UDS attack techniques, we demonstrate that our detection methods cover a wide range of potential attack vectors. Furthermore, we assess the adequacy of current AUTOSAR standardized security events in supporting UDS attack detection, identifying gaps in the current standard. This work enhances the understanding of vehicle security monitoring and provides an example for developing robust cybersecurity measures in automotive communication protocols.

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