CVE-2021-46320

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.

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-9c22-pwxw-p6hx	Third Party Advisory
https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-9c22-pwxw-p6hx	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openzeppelin:openzeppelin:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2022-02-04 12:15

Updated : 2024-11-21 06:33

NVD link : CVE-2021-46320

Mitre link : CVE-2021-46320

CVE.ORG link : CVE-2021-46320

JSON object : View

Products Affected

openzeppelin

openzeppelin

CWE

CWE-665

Improper Initialization

{"id": "CVE-2021-46320", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2022-02-04T12:15:07.623", "references": [{"url": "https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-9c22-pwxw-p6hx", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-9c22-pwxw-p6hx", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-665"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "En OpenZeppelin versiones anteriores a v4.4.0 incluy\u00e9ndola, las funciones del inicializador que son invocadas de forma independiente a la creaci\u00f3n del contrato (el ejemplo m\u00e1s destacado son los proxies m\u00ednimos) pueden volver a entrar si realizan una llamada externa no confiable. Una vez que un inicializador ha terminado de ejecutarse no puede volver a ejecutarse. Sin embargo, una excepci\u00f3n puesta en marcha para soportar la herencia m\u00faltiple hizo posible la reentrada, rompiendo la expectativa de que se presenta una \u00fanica ejecuci\u00f3n"}], "lastModified": "2024-11-21T06:33:52.607", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openzeppelin:openzeppelin:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "990E5873-0CB3-42D4-883D-3FD57FE55843", "versionEndIncluding": "4.4.0", "versionStartIncluding": "3.2.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}