Tracto ERC20 Integer Overflow Vulnerability
PHP:
Hello,I found an integer overflow in increaseApproval function.And it doesn't use the safe function to add value.
code addresss:
https://etherscan.io/address/0x30ceCB5461A449A90081F5a5F55db4e048397BAB
vuln code:
function increaseApproval (address _spender, uint _addedValue)
returns (bool success) {
//allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
allowed[msg.sender][_spender] += _addedValue; //integer overflow
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
This issue has been already applied for CVE-2018-14063
The issue link :
https://github.com/tracto2/Tracto-ERC20/issues/1
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# 0day.today [2018-07-30] #