CVE-2018-17987 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5