October 1, 2023
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Understanding EVM Exploits: A Comprehensive Overview

EVM Exploits Explained

The Ethereum Virtual Machine (EVM) is a crucial component of the Ethereum blockchain, enabling smart contracts to execute. However, its complexity can lead to vulnerabilities. In this article, we will explore various EVM exploits, their implications, and how developers can safeguard their applications.

Common Types of EVM Exploits

  • Reentrancy Attacks: These occur when a contract calls another contract and the second contract calls back into the first before the first call is finished.
  • Integer Overflow/Underflow: This happens when arithmetic operations exceed the maximum or minimum limits of a data type.
  • Gas Limit and Loops: Exploits can occur when contracts have unbounded loops that can consume all gas, leading to denial of service.

Understanding these vulnerabilities is essential for developers to create secure smart contracts.

What’s a Rich Text element?

The rich text element allows you to create and format headings, paragraphs, blockquotes, images, and video all in one place instead of having to add and format them individually. Just double-click and easily create content.

A rich text element can be used with static or dynamic content. For static content, just drop it into any page and begin editing. For dynamic content, add a rich text field to any collection and then connect a rich text element to that field in the settings panel. Voila!

Headings, paragraphs, blockquotes, figures, images, and figure captions can all be styled after a class is added to the rich text element using the "When inside of" nested selector system.

  1. Follow-up: Conduct a follow-up review to ensure that the remediation steps were effective and that the smart contract is now secure.
  2. Follow-up: Conduct a follow-up review to ensure that the remediation steps were effective and that the smart contract is now secure.

In Brief

  • Remitano suffered a $2.7M loss due to a private key compromise.
  • GAMBL’s recommendation system was exploited.
  • DAppSocial lost $530K due to a logic vulnerability.
  • Rocketswap’s private keys were inadvertently deployed on the server.

Hacks

Hacks Analysis

Huobi  |  Amount Lost: $8M

On September 24th, the Huobi Global exploit on the Ethereum Mainnet resulted in a $8 million loss due to the compromise of private keys. The attacker executed the attack in a single transaction by sending 4,999 ETH to a malicious contract. The attacker then created a second malicious contract and transferred 1,001 ETH to this new contract. Huobi has since confirmed that they have identified the attacker and has extended an offer of a 5% white hat bounty reward if the funds are returned to the exchange.

Exploit Contract: 0x2abc22eb9a09ebbe7b41737ccde147f586efeb6a

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