The world's largest bug bounty - $3.4 mln for a bug in Polygon blockchain

📧 Subscribe to BBRE Premium: https://ift.tt/yJgR8NX ✉️ Sign up for the mailing list: https://bbre.dev/nl Check out the sponsor of today's video - Immunefi bug bounty platform: https://ift.tt/u5TqeFR The repository with the exploit: https://ift.tt/p3JwoV9 📣 Follow me on Twitter: https://bbre.dev/tw This video is an explanation of a vulnerability found in an MRC20 smart contract of MATIC cryptocurrency in the Polygon blockchain network. The bug allowed stealing all the funds from the contract which was worth about $20 bln. The bounty for the bug was awarded $2,2 mln of bounty for the original reporter and $1,2 mln for the hunter that duplicated the report. It was awarded via the Immunefi bug bounty program. 🖥 Get $100 in credits for Digital Ocean: https://bbre.dev/do Report: https://ift.tt/7IanCeq Reporter's Twitter: https://twitter.com/leonspacewalker Timestamps: 00:00 Intro 00:28 Immunefi - the sponsor of today's video 01:04 How transferWithSig function should be used? 04:52 The ecrecover and _transfer functions 07:06 The exploit
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