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Learn about KernJC, an automated tool for generating vulnerable environments for Linux kernel vulnerabilities in this 32-minute Black Hat conference presentation. Discover how researchers from the National University of Singapore address critical challenges in kernel vulnerability reproduction by developing innovative patch-based and graph-based approaches. Explore the difficulties in establishing effective vulnerable environments, including incorrect vulnerability version claims in online databases and the need for intricate non-default kernel configurations that are often undocumented. Understand how KernJC's patch-based method identifies genuinely vulnerable kernel versions while its graph-based approach determines necessary configurations for activating specific vulnerabilities. Examine the comprehensive evaluation conducted on 66 representative real-world vulnerabilities from the past five years, revealing that 48.5% require non-default configurations and 4 have incorrect version claims in the National Vulnerability Database. Gain insights into the large-scale spurious version detection that identified 128 vulnerabilities with incorrect version claims in NVD, and learn about the tool's open-source release and accompanying dataset designed to foster future research in kernel security.
