DeFi Smart Contract Vulnerabilities Audit Guide

Here are three common DeFi smart contract vulnerabilities, along with specific detection methods using static analysis tools and manual auditing techniques.

1. Reentrancy Vulnerability

Description:

An attacker calls a function that sends funds to them before the function completes its state updates (e.g., balance deductions). They then re-enter the same function via a callback, repeating the transaction until the contract is drained.

Specific Detection Methods:

• Static Analysis Tools:
  • Slither: Run slither . and look for the reentrancy-eth or reentrancy-benign warnings. Slither flags functions that perform external calls (call, send, transfer) before updating state variables.
  • Mythril: Use mythril analyze contract.sol and check for Reentrancy findings. Mythril performs symbolic execution to simulate attack paths.
• Manual Pattern Recognition: -