RCTF 2018 - stringer

Writeup for challenge “stringer” of RCTF 2018.

This weekend I was busy playing RCTF 2018 with the mhackeroni team (we qualified for DEFCON last week - super pumped!). I really liked one of the pwnables, “stringer”. It was a heap challenge where I had to force calloc to not clear a chunk, which I thought was pretty cool.

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