Clutch Control: An Attention-Based Combinatorial Bandit for Efficient Mutation in JavaScript Engine Fuzzing

JavaScript engines are widely used in web browsers, PDF readers, and server-side applications. The rise in concern over their security has led to the development of several targeted fuzzing techniques. However, existing approaches use random selection to determine where to perform mutations in...

Fuzzing Closed-Source JavaScript Engines with Coverage Feedback

Posted by Ivan Fratric, Project Zero tl;dr I combined Fuzzilli an open-source JavaScript engine fuzzer, with TinyInst an open-source dynamic instrumentation library for fuzzing. I also added grammar-based mutation support to Jackalope my black-box binary fuzzer. So far, these two approaches...