DeFi Smart Contract Vulnerabilities Audit Guide

Here's a thinking process:

1. Analyze User Request:

   • Topic: DeFi smart contract vulnerabilities
   • Quantity: 3 common ones
   • Requirement: Specific detection methods
   • Format: List format

2. Identify Key Vulnerabilities in DeFi Smart Contracts:
   I need to pick 3 that are very common, well-documented, and have specific detection techniques. Good candidates:

   • Reentrancy attacks
   • Integer overflow/underflow (though less common now with Solidity ^0.8.0, still relevant in older code or other languages)
   • Access control issues (missing/misconfigured)
   • Front-running / MEV related issues
   • Logic bugs in financial operations (e.g., incorrect math, wrong token mappings)
   • Oracle manipulation
   • Flash loan attacks (often rely on other vulnerabilities)
   • Token approval exploits (ERC2