CVE-2018-17877

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
A lottery smart contract implementation for Greedy 599, an Ethereum gambling game, generates a random value that is predictable via an external contract call. The developer used the extcodesize() function to prevent a malicious contract from being called, but the attacker can bypass it by writing the core code in the constructor of their exploit code. Therefore, it allows attackers to always win and get rewards.
Overview
  • CVE ID
  • CVE-2018-17877
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2018-10-23T21:30:53
  • Last Modified Date
  • 2018-12-08T02:15:54
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:greedy599:greedy_599:-:*:*:*:*:*:*:* 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://github.com/TEAM-C4B/CVE-LIST/tree/master/CVE-2018-17877 Exploit Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-17877
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-17877
History
Created Old Value New Value Data Type Notes
2022-05-10 17:50:23 Added to TrackCVE
2022-12-03 13:46:15 2018-10-23T21:30Z 2018-10-23T21:30:53 CVE Published Date updated
2022-12-03 13:46:15 2018-12-08T02:15:54 CVE Modified Date updated
2022-12-03 13:46:15 Analyzed Vulnerability Status updated