HIGH
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
Published Aug 3, 2018
7.5
HIGHCVSS 3.0
EPSS 1.25%
Description
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact None
Availability Impact None
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:P/I:N/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.25% 0.01253
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01253
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.25% (0.01253) | 68.37th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.25% (0.01253) | 68.12th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.17% (0.00168) | 54.13th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.17% (0.00168) | 53.66th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.59% (0.00588) | 75.50th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.41% (0.00414) | 69.99th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.42% (0.00416) | 10.04th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
Weaknesses (1)
References (1)
- https://medium.com/%40jonghyk.song/attack-on-pseudo-random-number-generator-prng-used-in-cryptogs-an-ethereum-cve-2018-14715-f63a51ac2eb9 x_refsource_MISC
| Link | Providers | Tags |
|---|---|---|
| https://medium.com/%40jonghyk.song/attack-on-pseudo-random-number-generator-prng-used-in-cryptogs-an-ethereum-cve-2018-14715-f63a51ac2eb9 | x_refsource_MISC |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Aug 3, 2018
Updated Aug 5, 2024
Reserved Jul 28, 2018
Link CVE-2018-14715
CISA Vulnrichment
Updated n/a