DeFi Smart Contract Vulnerabilities Audit Guide

Here are three specific DeFi smart contract vulnerabilities suitable for inclusion in a professional audit report. Each entry follows a standard audit format: Vulnerability Name, Severity, Description, Impact, and Recommendation.

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1. Reentrancy in Yield Aggregator

• Severity: High
• Vulnerability Type: Reentrancy (CWE-693)

• Description:
  The CompoundYieldAggregator contract interacts with an external protocol (e.g., Compound) to stake assets for yield. The withdraw() function allows users to claim their shares. However, the contract updates the user’s balance after sending the ETH or tokens to the user. Since the external call to the underlying protocol or the transfer() call can trigger a fallback function in a malicious contract, an attacker can re-enter the withdraw() function before the state variables are updated.

  **Vulnerable