CVE-2021-46320

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
In OpenZeppelin <=v4.4.0, initializer functions that are invoked separate from contract creation (the most prominent example being minimal proxies) may be reentered if they make an untrusted non-view external call. Once an initializer has finished running it can never be re-executed. However, an exception put in place to support multiple inheritance made reentrancy possible, breaking the expectation that there is a single execution.
Overview
  • CVE ID
  • CVE-2021-46320
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2022-02-04T12:15:07
  • Last Modified Date
  • 2022-02-09T15:30:40
Weakness Enumerations
CWE URL
CWE-665 http://cwe.mitre.org/data/definitions/665.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:openzeppelin:openzeppelin:*:*:*:*:*:*:*:* 1 OR 3.2.0 4.4.0
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • 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/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-9c22-pwxw-p6hx Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-46320
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46320
History
Created Old Value New Value Data Type Notes
2022-05-10 06:33:30 Added to TrackCVE
2022-12-06 08:32:21 2022-02-04T12:15Z 2022-02-04T12:15:07 CVE Published Date updated
2022-12-06 08:32:21 2022-02-09T15:30:40 CVE Modified Date updated
2022-12-06 08:32:21 Analyzed Vulnerability Status updated