Overflow is a situation when uint reaches its byte size. Then the next element added will return the first variable element. This is only for <0.8 Solidity.

Claim ownership of the contract. Reduce the balance of the contract to 0.

The attacker can create a contract with a selfdestruct() function, send ether to it, call selfdestruct(target) and force ether to be sent to a target.

This is the second part of my series around Ethernaut Game. In this post, we will deal with Level 2: Fallout.

In level 3 you have to play a game: coin flip. To complete this level you'll need to guess the correct outcome of a coin flip 10 times in a row

In level 4 of the Ethernaut Game, our goal is to claim ownership of the Telephone contract.

In challenge 5 you are given 20 tokens to start with and you will beat the level if you somehow manage to get your hands on any additional tokens.

In this article, I modeled how to visualize codes, and also visually told you how developers or hackers read these codes.

A security issue in Solidity boils down to smart contracts not behaving the way they were intended to.

Read about the attack on Tornado Cash governance and understand it in the simplest form.