Every Python user knows that you can execute code using
exec, but what about
str.format? This talk will take you on a walk through all the weird and wild ways that you can achieve code execution on a Python server (and trust me, I didn’t spoil the surprise by putting the weirdest ones in the description).
The talk should be equal parts practical and entertaining as we work through both real examples of code execution vulnerabilities found in running code as well as absurd remote code execution exploits. The talk will end on a practical note by explaining how Facebook detects and prevents the exploit vectors we discussed, using an open source Python Static Analyzer called Pysa.