Here are three specific DeFi smart contract vulnerabilities suitable for inclusion in a security audit report, formatted with technical details, impact analysis, and mitigation strategies.
1. Unchecked Return Values in Low-Level Calls (call)
Vulnerability Class: Reentrancy / State Inconsistency
Severity: High
Affected Component: External Token Transfers (e.g., in AMM or Vault contracts)
Description:
The contract uses low-level calls (address.call{value: amount}("")) to transfer Ether or interact with external contracts but fails to check the return value (success). In Solidity, low-level calls do not revert on failure; they return false if the call fails (e.g., due to insufficient gas, out-of-gas, or the target contract reverting). If the return value is ignored, the local state (e.g., user balances) may be updated as if the transfer succeeded, even though the external
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