What’s Vulnerable › Vulnerabilities

CVE-2018-17987

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-12-26 · updated 2026-06-17
• Weakness: CWE-330

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.

Affected products

• Hashheroes: all versions

References

• https://github.com/TEAM-C4B/CVE-LIST/tree/master/CVE-2018-17987
• https://github.com/TEAM-C4B/CVE-LIST/tree/master/CVE-2018-17987

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