---
id: 2060
title: "Hands on the Ethernaut CTF"
source_domain: blog.trailofbits.com
source_url: "https://blog.trailofbits.com/2017/11/06/hands-on-the-ethernaut-ctf/"
published_at: "2017-11-06T19:32:19Z"
tags: ["web3", "smart-contracts", "ctf", "blockchain", "ethereum", "solidity", "ethernaut", "reentrancy"]
phying_url: "https://phying.com/item/2060"
lang: en
---

# Hands on the Ethernaut CTF

## Summary

A Trail of Bits engineer walks through OpenZeppelin's Ethernaut CTF on the Ropsten testnet, solving fallback, delegation, and re-entrancy challenges that teach smart contract vulnerability basics.

## Intelligence Metadata

- **Sources:** blog.trailofbits.com
- **Published:** 2017-11-06T19:32:19Z
- **Original:** https://blog.trailofbits.com/2017/11/06/hands-on-the-ethernaut-ctf/
- **Phying News:** https://phying.com/item/2060