Vulnerabilities > CVE-2018-12885 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) vulnerability in Mycryptochamp

047910
CVSS 5.9 - MEDIUM
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
NONE
Availability impact
NONE
network
high complexity
mycryptochamp
CWE-338
NVD
Published: 2018-08-07
Updated: 2024-11-21

Summary

The randMod() function of the smart contract implementation for MyCryptoChamp, an Ethereum 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, attackers can get powerful champs/items and get rewards.

Vulnerable Configurations

Part Description Count
Application
Mycryptochamp
1

Common Weakness Enumeration (CWE)

References