CVE Vulnerability

CVE-2018-12454

The _addguess function of a simplelottery smart contract implementation for 1000 Guess, an Ethereum gambling game, generates a random value with publicly readable variables such as the current block information and a private variable (which can be read with a getStorageAt call). Therefore, it allows attackers to always win and get rewards.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://medium.com/@jonghyk.song/attack-on-pseudo-random-number-generator-prng-used-in-1000-guess-an-ethereum-lottery-game-7b76655f953d Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:1000guess:1000_guess:-:*:*:*:*:*:*:*
Information

Published : 2018-06-17 12:29

Updated : 2018-08-14 05:44

NVD link : CVE-2018-12454

Mitre link : CVE-2018-12454

Products Affected
No products.
CWE
CWE-338

Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)