medium5.9
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…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mycryptochamp | Mycryptochamp | All versions |
Weakness classification
References
- NVD record
- CVE.org record
- 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-2018-12855-6e6beb41b8df
- 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-2018-12855-6e6beb41b8df