CVE-2018-17987 — HIGH (7.5)

Vulnerability 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 Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Hashheroes	Hashheroes	-

Related Weaknesses (CWE)

CWE-330

References

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

FAQ

What is CVE-2018-17987?

CVE-2018-17987 is a vulnerability with a CVSS score of 7.5 (HIGH). 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_...

How severe is CVE-2018-17987?

CVE-2018-17987 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2018-17987?

Check the references section above for vendor advisories and patch information. Affected products include: Hashheroes Hashheroes.