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Last weeks video was about revisiting format level 0 from exploit-exercises/protostar on a modern ubuntu system. And we played around with it to see if we can figure out a way to exploit it, but in the end I wasnt able to solve it. But lucky for me a user with the name wcbowling on reddit thought it was fun too and actually had a method to exploit it. So lets have a look at it. So here is wcbowlings post: I love going back to old challenged like this :) Managed to get a fairly reliable exploit, normally under 500 iterations. And there is a highlevel description on how it works: Overwrite the GOT entry for stackchkfail with an address so we jump there instead. The address can be passed in via argv, we cant use nulls but we can use blank strings instead. As the argv location is semi random, it takes around 500 iterations which is pretty reasonable for 64bit So obviously I didnt manage to figure that out, which means I didnt know something and here is a learning opportunity for me
