Part 2

Description

The withdrawMarginUsd function interacts with external tokens without protection against reentrancy attacks.

Summary

A malicious token contract could re-enter the function during a transfer, manipulating the contract's state and potentially draining funds.

Vulnerability Details

• Issue: The function transfers tokens to an external address without using reentrancy protection.

• Example: A malicious token contract could call back into the function during the transfer, exploiting the contract's state.

Impact

• Malicious actors could drain the contract's funds.

Tools Used

• Manual Code Review

• Slither

Recommendations

• Use the Checks-Effects-Interactions pattern.

• Add a nonReentrant modifier.

bool private locked;

modifier nonReentrant() {

require(!locked, "Reentrancy detected");

locked = true;

_;

locked = false;

}