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.

Score

CVSS 3.0 7.5 High

Status

Modified - cve@mitre.org

Published

2018-06-17

Last modified

2024-08-05

Weaknesses

CWE-338

Affected products

• 1000 Guess (1000guess)

References

• https://medium.com/%40jonghyk.song/attack-on-pseudo-random-number-generator-prng-used-in-1000-guess-an-ethereum-lottery…