smartbugs-curated/dataset/unchecked_low_level_calls/0xb11b2fed6c9354f7aa2f658d3b4d7b31d8a13b77.sol

/*
 * @source: etherscan.io 
 * @author: -
 * @vulnerable_at_lines: 14
 */

pragma solidity ^0.4.24;

contract Proxy  {
    modifier onlyOwner { if (msg.sender == Owner) _; } address Owner = msg.sender;
    function transferOwner(address _owner) public onlyOwner { Owner = _owner; } 
    function proxy(address target, bytes data) public payable {
        // <yes> <report> UNCHECKED_LL_CALLS
        target.call.value(msg.value)(data);
    }
}

contract DepositProxy is Proxy {
    address public Owner;
    mapping (address => uint256) public Deposits;

    function () public payable { }
    
    function Vault() public payable {
        if (msg.sender == tx.origin) {
            Owner = msg.sender;
            deposit();
        }
    }
    
    function deposit() public payable {
        if (msg.value > 0.5 ether) {
            Deposits[msg.sender] += msg.value;
        }
    }
    
    function withdraw(uint256 amount) public onlyOwner {
        if (amount>0 && Deposits[msg.sender]>=amount) {
            msg.sender.transfer(amount);
        }
    }
}