Finding the needle in the heap
Josselin Feist, Laurent Mounier, Sébastien Bardin, Robin David, Marie-Laure Potet · 2016
This paper presents a fully automated technique to find and trigger Use-After-Free vulnerabilities (UAF) on binary code. The approach combines a static analyzer and a dynamic symbolic execution engine. We also introduce several original heuristics for the dynamic symbolic execution part, speeding up the exploration and making this combination effective in practice. The tool we developed is open-source, and it has successfully been applied on real world vulnerabilities. As an example, we detail a proof-of-concept exploit triggering a previously unknown vulnerability on JasPer leading to the CVE-2015-5221.