19 / Reentrancy

In episode 19, we discuss the recent Wolf Game reentrancy attack and its implications. We also cover Omnichain, the reason why bridges and L2s keep getting hacked, and the different types of vulnerabilities in bridges. Join us for valuable insights on reentrancy and security in the blockchain space.

Timeline

00:00 Intro

00:40 NFT Tallinn updates

02:04 Wolf Game hack

02:51 Is safeTransferFrom bad?

04:05 Check effects interactions pattern

04:39 What does a reentrancy vulnerability look like?

06:21 A CS definition of reentrancy issues

07:08 A math definition of reentrancy issues

08:21 What is Ethereum Magicians?

08:59 What is Ethereum Cat Herders?

13:04 Kinds of vulnerabilities in bridges

13:43 Basic attacks on bridges

Badges

Episode notes

Edit these notes…

NFT Tallinn videos https://www.youtube.com/watch?v=V1oqC7ZaLiw
Wolf Game reentracncy attack
- https://muellerberndt.medium.com/wolf-game-herdsmans-report-5802c9d477bd
- https://twitter.com/not__stoops/status/1462645706775162883
- https://etherscan.io/address/0xeb834ae72b30866af20a6ce5440fa598bfad3a42#code
Omnichain
https://medium.com/layerzero-official/layerzero-an-omnichain-interoperability-protocol-b43d2ae975b6
Why do bridges/L2s keep getting hacked?