Cross-Chain Bridge Security Audit

Challenge Overview

Cross-Chain Bridge Security Audit is a Capture The Flag (CTF) challenge focused on finding security vulnerabilities in Multi-chain's Smart Contract and Bridge implementation.

Background

This cross-chain bridge allows users to transfer assets between Ethereum, Binance Smart Chain, Polygon, and Avalanche. The bridge uses a combination of smart contracts and validators to ensure secure asset transfers.

Objectives

• Identify vulnerabilities in the bridge smart contracts
• Find potential exploits in the validator mechanism
• Discover any issues with the asset locking and minting process
• Identify cross-chain replay attack vectors

Resources

• GitHub Repository - Source code for the bridge
• Documentation - Technical documentation and architecture
• Testnet Deployment - Deployed contracts on various testnets