The determineWinner function of a smart contract implementation for HashHeroes Tiles, an Ethereum game, uses a certain blockhash value in an attempt to generate a random number for the case where NUM_TILES equals the number of people who purchased a tile, which allows an attacker to control the awarding of the prize by being the last person to purchase a tile.
The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.
Link | Tags |
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https://github.com/TEAM-C4B/CVE-LIST/tree/master/CVE-2018-17987 | third party advisory exploit |