[ethernaut] (18 Magic Number)

 

 

 

 

문제코드 

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract MagicNum {
    address public solver;

    constructor() {}

    function setSolver(address _solver) public {
        solver = _solver;
    }

    /*
    ____________/\\\_______/\\\\\\\\\_____        
     __________/\\\\\_____/\\\///////\\\___       
      ________/\\\/\\\____\///______\//\\\__      
       ______/\\\/\/\\\______________/\\\/___     
        ____/\\\/__\/\\\___________/\\\//_____    
         __/\\\\\\\\\\\\\\\\_____/\\\//________   
          _\///////////\\\//____/\\\/___________  
           ___________\/\\\_____/\\\\\\\\\\\\\\\_ 
            ___________\///_____\///////////////__
    */
}

 

솔버 코드 

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "forge-std/Script.sol";
import "../src/MagicNumber.sol";

contract Attack {
    constructor() {
        assembly {
            mstore(0, 0x602a60805260206080f3) 
            return(0x16, 0x0a)
        }
    }
}

contract POC is Script {

    function run() public {
        vm.startBroadcast();
        Attack atk = new Attack();
        MagicNum target = MagicNum(0x39E84B73390B3d2e14BbcacF4F1E857d4e750fc6);
        target.setSolver(address(atk));
        vm.stopBroadcast();
    }
}

 

 

아직 evm어셈은 잘 모르겠다...