CVE-2018-12885
The randMod() function of the smart contract implementation for MyCryptoChamp, an Ethereum game,...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2018-12885- CVSS 3.0
- 5.9 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2018-12885- Updated
- 2026-11-02
EUVDEUVD-2018-4838 No score
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.
- Record
EUVD-2018-4838- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-h4gq-q399-xm7r
The randMod() function of the smart contract implementation for MyCryptoChamp, an Ethereum game,...
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.
- Record
GHSA-h4gq-q399-xm7r- CVSS 3.0
- 5.9 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-338
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-12885 is a medium vulnerability (CVSS 5.9) in Mycryptochamp, published August 7, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.39%, the 72nd percentile. No source names a fixed version.
References
etherscan.io/address/0xa44e464b13280340904ffef0a65b8a0033460430
medium.com/coinmonks/get-legendary-items-by-breaking-pnrg-of-mycyptochamp-an-ethereum-online-game-cve-2018-12855-6e6beb41b8df
nvd.nist.gov/vuln/detail/CVE-2018-12885
github.com/advisories/GHSA-h4gq-q399-xm7r