cve/2018/CVE-2018-12454.md

CVE-2018-12454

Description

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.

POC

Reference

• https://medium.com/@jonghyk.song/attack-on-pseudo-random-number-generator-prng-used-in-1000-guess-an-ethereum-lottery-game-7b76655f953d
• https://medium.com/@jonghyk.song/attack-on-pseudo-random-number-generator-prng-used-in-1000-guess-an-ethereum-lottery-game-7b76655f953d

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/lnick2023/nicenice
• https://github.com/qazbnm456/awesome-cve-poc
• https://github.com/xbl3/awesome-cve-poc_qazbnm456