Vulnerabilities > CVE-2018-12454 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) vulnerability in 1000Guess 1000 Guess
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
NONE Availability impact
NONE Summary
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.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 1 |