62 lines
1.7 KiB
Solidity
62 lines
1.7 KiB
Solidity
/*
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* @source: https://github.com/thec00n/smart-contract-honeypots/blob/master/CryptoRoulette.sol
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* @vulnerable_at_lines: 40,41,42
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*/
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pragma solidity ^0.4.19;
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// CryptoRoulette
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//
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// Guess the number secretly stored in the blockchain and win the whole contract balance!
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// A new number is randomly chosen after each try.
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// https://www.reddit.com/r/ethdev/comments/7wp363/how_does_this_honeypot_work_it_seems_like_a/
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// To play, call the play() method with the guessed number (1-20). Bet price: 0.1 ether
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contract CryptoRoulette {
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uint256 private secretNumber;
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uint256 public lastPlayed;
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uint256 public betPrice = 0.1 ether;
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address public ownerAddr;
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struct Game {
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address player;
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uint256 number;
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}
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Game[] public gamesPlayed;
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function CryptoRoulette() public {
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ownerAddr = msg.sender;
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shuffle();
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}
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function shuffle() internal {
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// randomly set secretNumber with a value between 1 and 20
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secretNumber = uint8(sha3(now, block.blockhash(block.number-1))) % 20 + 1;
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}
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function play(uint256 number) payable public {
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require(msg.value >= betPrice && number <= 10);
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// <yes> <report> OTHER - uninitialized storage
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Game game; //Uninitialized storage pointer
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game.player = msg.sender;
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game.number = number;
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gamesPlayed.push(game);
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if (number == secretNumber) {
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// win!
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msg.sender.transfer(this.balance);
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}
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shuffle();
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lastPlayed = now;
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}
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function kill() public {
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if (msg.sender == ownerAddr && now > lastPlayed + 1 days) {
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suicide(msg.sender);
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}
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}
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function() public payable { }
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}
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