25 lines
626 B
Solidity
25 lines
626 B
Solidity
|
/*
|
||
|
|
* @source: https://github.com/trailofbits/not-so-smart-contracts/blob/master/integer_overflow/integer_overflow_1.sol
|
||
|
|
* @author: -
|
||
|
|
* @vulnerable_at_lines: 14
|
||
|
|
*/
|
||
|
|
|
||
|
|
pragma solidity ^0.4.15;
|
||
|
|
|
||
|
|
contract Overflow {
|
||
|
|
uint private sellerBalance=0;
|
||
|
|
|
||
|
|
function add(uint value) returns (bool){
|
||
|
|
// <yes> <report> ARITHMETIC
|
||
|
|
sellerBalance += value; // possible overflow
|
||
|
|
|
||
|
|
// possible auditor assert
|
||
|
|
// assert(sellerBalance >= value);
|
||
|
|
}
|
||
|
|
|
||
|
|
// function safe_add(uint value) returns (bool){
|
||
|
|
// require(value + sellerBalance >= sellerBalance);
|
||
|
|
// sellerBalance += value;
|
||
|
|
// }
|
||
|
|
}
|