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Explore critical security vulnerabilities in the OPC UA industrial automation protocol through this 41-minute Black Hat conference presentation. Discover how two significant protocol-level cryptographic flaws can be exploited to bypass authentication in OPC UA implementations, potentially compromising industrial systems without requiring VPN access. Learn about the OPC UA protocol's role as a bridge between IT and OT environments, its widespread use in industrial automation and IoT, and why organizations often consider it secure enough to operate without additional VPN protection due to its built-in cryptographic authentication and transport security layer. Examine the detailed process of identifying and exploiting signing oracles, signature spoofing padding oracles, and techniques for transforming "RSA-ECB" into a timing side channel amplifier. Understand how these theoretical cryptographic vulnerabilities can be converted into highly practical exploits that work across various OPC UA implementations and configurations, potentially allowing attackers to hijack internet-exposed OPC UA servers and compromise connected industrial systems.
