CVE-2018-12885

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.

Score

CVSS 3.0 5.9 Medium

Status

Modified - cve@mitre.org

Published

2018-08-07

Last modified

2024-08-05

Weaknesses

CWE-338

Affected products

• Mycryptochamp (Mycryptochamp)

References

• https://etherscan.io/address/0x689FB61845488297dfE7586E5f7956475955d2Dc
• https://etherscan.io/address/0xa44e464b13280340904ffef0a65b8a0033460430
• https://medium.com/coinmonks/get-legendary-items-by-breaking-pnrg-of-mycyptochamp-an-ethereum-online-game-cve-2018-1285…