https://ahessmat.netlify.com/tags/binary/Recent content in binary on Asa's WebsiteHugo -- gohugo.ioen-usSun, 18 Apr 2021 05:24:13 +0000https://ahessmat.netlify.com/post/2021-04-picoctf-2021-writeup-stonks/Sun, 18 Apr 2021 05:24:13 +0000https://ahessmat.netlify.com/post/2021-04-picoctf-2021-writeup-stonks/Preamble The Stonks problem was a binary exploitation problem set out by the PicoCTF 2021 competition. This problem featured a variety of techniques that I hadn’t used before and introduced me to some new tools to consider in the future. The problem may be accessed here for those interested. This problem provided a source code file - vuln.c - and a compiled version accessible via netcat. Ultimately, as the attacker we are meant to evaluate the source code to identify a vulnerability; once the vulnerability is discovered, we should exploit it on the compiled version in order to achieve the flag (format: picoCTF{…}).