Ethernaut CTF - Dex Two (Level 23)

Get the free 30-day AI Mastery series 💌: https://insights.gradientlabs.co/ Work with me 💪: https://offerings.gradientlabs.co/ Next up! Level 23 - Dex Two In this CTF series, we’re going to learn more about the practical side of smart contract auditing and security. If you’re interested in more/similar content, checkout my channel or website below. My digital dumping ground - dylandavis.net Additional Resources Ethernaut CTF - https://ethernaut.openzeppelin.com/ SupperJackdrummer (The best) - https://youtu.be/5ZLgOUCmgb8 ThisPost (Original solve for Dex) - https://medium.com/@this_post/ethernaut-22-dex-writeups-55d4bfa8a7fa Naveen (great explanation) - https://dev.to/nvn/ethernaut-hacks-level-23-dex-two-4424 Adrian Romero (straight to the point) - https://github.com/romeroadrian/ethernaut-solutions/blob/main/23-dex2.md Open Zeppelin ERC20 Specs - https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol Timeline 00:00 - Intro and shoutout to SuperJackdrummer 02:55 - Code Review (target) 09:40 - Sharing Resources 10:33 - The approval issue 11:56 - High Level solution walkthrough 14:30 - Workaround to approval issue 16:58 - Code review (attack) 18:00 - Solving the challenge 22:25 - Outro