$[40]4.$ The smart contract in the figure below is to be used as a third party to donate funds to other

users.

A$.$ Research common smart contract vulnerabilities and explain in detail why this con$-$

tract is not secure and how an exploiter can exploit this contract to steal all the funds

Homework Assignment $3$

deposited in the contract. We have provided the exploiter contract at contracts$/$ Vulner$-$

abilityExploit.sol. Try to analyze the logic of this exploiter contract and how it might

interact maliciously with the vulnerable contract $($contracts$/$Vulnerability$.$sol$).$

Hints: If a function from one contract is called from another contract, msg$.$sender will be the calling

contract's address. The unnamed receive$()$ external payable function is a fallback function $($if you are

unfamiliar with a fallback function, research what a fallback function is$).$