7.5high
CVE-2018-14715
The endCoinFlip function and throwSlammer function of the smart contract implementations for Cryptogs, an Ethereum game, generate random nu…
Published 8 y ago · modified 4 mo ago · JSON
CVSS
7.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.3%
percentile 70%
Public exploits
0
none known
Summary
The endCoinFlip function and throwSlammer function of the smart contract implementations for Cryptogs, an Ethereum game, generate random numbers with an old block's hash. Therefore, attackers can predict the random number and always win the game.
Exploit prediction (EPSS)
1.25% probability of exploitation in the next 30 days, higher than 70% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
- CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
References
- medium.com /%40jonghyk.song/attack-on-pseudo-random-number-generator-prng-used-in-cryptogs-an-ethereu · x_refsource_MISC, x_transferred
Sources
- CVE List: CVE-2018-14715
- NVD: CVE-2018-14715
vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.