Reentrancy vulnerability in `MetaSwap.swap()`.md

18 - Reentrancy vulnerability in MetaSwap.swap()

If an attacker is able to reenter swap(), they can execute their own trade using the same tokens and get all the tokens for themselves.

Recommendation:

Use a simple reentrancy guard, such as OpenZeppelin’s ReentrancyGuard to prevent reentrancy in MetaSwap.swap()

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Slide Screenshot

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Slide Text

• ConsenSys Audit MetaSwap Finding 4.1
• Reentrancy
• Major Severity
• Swap Reentrancy
• Use Reentrancy Guard

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References

• Youtube Reference
• Major severity finding from Consensys Diligence Audit of MetaSwap

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