CVE-2018-17071

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
The fallback function of a simple lottery smart contract implementation for Lucky9io, an Ethereum gambling game, generates a random value with the publicly readable variable entry_number. This variable is private, yet it is readable by eth.getStorageAt function. Also, attackers can purchase a ticket at a low price by directly calling the fallback function with small msg.value, because the developer set the currency unit incorrectly. Therefore, it allows attackers to always win and get rewards.
Overview
  • CVE ID
  • CVE-2018-17071
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2018-09-18T21:29:03
  • Last Modified Date
  • 2018-12-10T14:53:01
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:lucky9:lucky9io:-:*:*:*:*:*:*:* 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-2018-17071 Exploit Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-17071
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-17071
History
Created Old Value New Value Data Type Notes
2022-05-10 17:50:22 Added to TrackCVE
2022-12-03 12:19:22 2018-09-18T21:29Z 2018-09-18T21:29:03 CVE Published Date updated
2022-12-03 12:19:22 2018-12-10T14:53:01 CVE Modified Date updated
2022-12-03 12:19:22 Analyzed Vulnerability Status updated