CVEvulnerability

CVE-2018-17987

7.5 HIGH Published 2018-12-26 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-12-26
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
7.5 HIGH — CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
Weaknesses
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 configurations

• hashheroes hashheroes

Related

Weakness · CWE (1)

  • CWE-330 Use of Insufficiently Random Values weakness

References