High severity7.5NVD Advisory· Published Dec 26, 2018· Updated Jun 17, 2026
CVE-2018-17987
CVE-2018-17987
Description
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.
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Affected products
2- cpe:2.3:a:hashheroes:hashheroes:-:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
1- github.com/TEAM-C4B/CVE-LIST/tree/master/CVE-2018-17987nvdExploitThird Party Advisory
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