Part 2

Description

Arithmetic operations involving amountToWithdrawUsd and marginCollateralPriceUsd could overflow or underflow if not properly constrained.

Summary

Extremely large values for amountToWithdrawUsd or marginCollateralPriceUsd could cause unexpected behavior.

Vulnerability Details

• Issue: The function does not explicitly check for overflow/underflow in arithmetic operations.

• Example: Multiplying amountToWithdrawUsd by marginCollateralPriceUsd could exceed uint256 limits.

Impact

• Incorrect calculations could result in incorrect withdrawals or contract state corruption.

Tools Used

• Manual Code Review

• Foundry/Forge

Recommendations

• Add explicit checks for overflow/underflow.

require(amountToWithdrawUsd <= type(uint256).max / marginCollateralPriceUsd, "Overflow risk");