Vulnerabilities > CVE-2018-12975 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) vulnerability in Cryptosaga
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
NONE Availability impact
NONE Summary
The random() function of the smart contract implementation for CryptoSaga, an Ethereum game, generates a random value with publicly readable variables such as timestamp, the current block's blockhash, and a private variable (which can be read with a getStorageAt call). Therefore, attackers can precompute the random number and manipulate the game (e.g., get powerful characters or get critical damages).
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 1 |