CVE-2018-12056 Information

Description

The maxRandom function of a smart contract implementation for All For One an Ethereum gambling game generates a random value with publicly readable variables because the _seed value can be retrieved with a getStorageAt call. Therefore it allows attackers to always win and get rewards.

CVSS Vector

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

Reference

https://lists.apache.org/thread.html/a62aa2706105d68f1c02023fe24aaa3c13b4d8a1826181fed07d9682@3Cnotifications.zookeeper.apache.org3E https://medium.com/@jonghyk.song/to-be-a-winner-of-ethereum-gambling-game-all-for-one-by-breaking-prng-1ab011163d40

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5