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 the most common, impactful, and well-documented ones. Top 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 (owner-only functions, proxy patterns)
   • Front-running / MEV issues
   • Flash loan attacks (often via price manipulation or collateral swapping)
   • Oracle manipulation
   • Logic errors in tokenomics/swap functions
   • Timestamp dependence
   • Unprotected self-calls / delegatecall in prox