CVE-2018-12885

CVSS V2 Medium 4.3 CVSS V3 Medium 5.9
Description
The randMod() function of the smart contract implementation for MyCryptoChamp, an Ethereum game, generates a random value with publicly readable variables such as the current block information and a private variable, (which can be read with a getStorageAt call). Therefore, attackers can get powerful champs/items and get rewards.
Overview
  • CVE ID
  • CVE-2018-12885
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2018-08-07T15:29:00
  • Last Modified Date
  • 2018-10-18T14:40:50
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:mycryptochamp:mycryptochamp:-:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:N/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 4.3
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • NONE
  • Base Score
  • 5.9
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.2
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://medium.com/coinmonks/get-legendary-items-by-breaking-pnrg-of-mycyptochamp-an-ethereum-online-game-cve-2018-12855-6e6beb41b8df Exploit Third Party Advisory
https://etherscan.io/address/0xa44e464b13280340904ffef0a65b8a0033460430 Third Party Advisory
https://etherscan.io/address/0x689FB61845488297dfE7586E5f7956475955d2Dc Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-12885
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12885
History
Created Old Value New Value Data Type Notes
2022-05-10 18:10:13 Added to TrackCVE
2022-12-03 11:00:43 2018-08-07T15:29Z 2018-08-07T15:29:00 CVE Published Date updated
2022-12-03 11:00:43 2018-10-18T14:40:50 CVE Modified Date updated
2022-12-03 11:00:43 Analyzed Vulnerability Status updated