41 lines
1.1 KiB
Solidity
41 lines
1.1 KiB
Solidity
/*
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* @source: https://smartcontractsecurity.github.io/SWC-registry/docs/SWC-124#arbitrary-location-write-simplesol
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* @author: Suhabe Bugrara
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* @vulnerable_at_lines: 27
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*/
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pragma solidity ^0.4.25;
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contract Wallet {
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uint[] private bonusCodes;
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address private owner;
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constructor() public {
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bonusCodes = new uint[](0);
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owner = msg.sender;
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}
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function () public payable {
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}
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function PushBonusCode(uint c) public {
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bonusCodes.push(c);
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}
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function PopBonusCode() public {
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// <yes> <report> ACCESS_CONTROL
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require(0 <= bonusCodes.length); // this condition is always true since array lengths are unsigned
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bonusCodes.length--; // an underflow can be caused here
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}
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function UpdateBonusCodeAt(uint idx, uint c) public {
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require(idx < bonusCodes.length);
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bonusCodes[idx] = c; // write to any index less than bonusCodes.length
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}
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function Destroy() public {
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require(msg.sender == owner);
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selfdestruct(msg.sender);
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}
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}
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