CVE-2018-14715

CVSS V2 Medium 5 CVSS V3 High 7.5

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.

Overview

CVE ID
CVE-2018-14715

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2018-08-03T18:29:00

Last Modified Date
2018-10-02T19:30:52

Weakness Enumerations

CWE	URL
CWE-338	http://cwe.mitre.org/data/definitions/338.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:cryptogs:cryptogs:-:::::::*	1	OR

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:L/Au:N/C:P/I:N/A:N

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
NONE

Availability Impact
NONE

Base Score
5

Severity
MEDIUM

Exploitability Score
10

Impact Score
2.9

CVSS Version 3

Version
3.0

Vector String
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
NONE

Base Score
7.5

Base Severity
HIGH

Exploitability Score
3.9

Impact Score
3.6

References

Reference URL	Reference Tags
https://medium.com/@jonghyk.song/attack-on-pseudo-random-number-generator-prng-used-in-cryptogs-an-ethereum-cve-2018-14715-f63a51ac2eb9	Exploit Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2018-14715
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14715

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 18:37:30				Added to TrackCVE
2022-12-03 10:53:26	2018-08-03T18:29Z	2018-08-03T18:29:00	CVE Published Date	updated
2022-12-03 10:53:26		2018-10-02T19:30:52	CVE Modified Date	updated
2022-12-03 10:53:26		Analyzed	Vulnerability Status	updated