PicoCTF Guessing Game 1 Binary Exploitation challenge walkthrough - ret2syscall (Stack Pivot).

pico ctf guessing game 1 pwn challenge writeup, ret2syscall and stack pivot. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔥 𝗪𝗔𝗧𝗖𝗛 𝗧𝗜𝗟𝗟 𝗧𝗛𝗘 𝗘𝗡𝗗 🔥 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ If you enjoyed this video... 👀 👍 Like the video 🔔 Subscribe to the channel 💬 Comment your thoughts below 📤 Share with your friends! ⚡ Your support keeps the hammer swinging! 🦆🔨 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📱 𝗙𝗢𝗟𝗟𝗢𝗪 𝗠𝗘 𝗛𝗘𝗥𝗘 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🐥 Twitter/X: @w3th4nds 🔗 LinkedIn: https://www.linkedin.com/in/thanos-sarridis/ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🍺 Beer or Coffee ☕? https://buymeacoffee.com/w3th4nds ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🧠 What did you think of the video? Drop your opinion or 🔥 emoji in the comments! 👀 Watching but not subscribed? 👉 Hit that [🔴 SUBSCRIBE] button now & don’t miss a thing! Chapters: 0:00 Intro 0:31 File the binary 0:45 Soruce Code review 0:54 First bug, psuedorandom number with rand() 1:28 Second bug, Buffer Overflow 1:53 A bit of a theory about syscalls and gadgets 4:00 Find pseudorandom number 5:00 Find the overflow offset 5:22 Exploit time