CVE-2023-44981 (GCVE-0-2023-44981)

Vulnerability from cvelistv5 – Published: 2023-10-11 11:55 – Updated: 2025-04-23 16:15
VLAI
Title
Apache ZooKeeper: Authorization bypass in SASL Quorum Peer Authentication
Summary
Authorization Bypass Through User-Controlled Key vulnerability in Apache ZooKeeper. If SASL Quorum Peer authentication is enabled in ZooKeeper (quorum.auth.enableSasl=true), the authorization is done by verifying that the instance part in SASL authentication ID is listed in zoo.cfg server list. The instance part in SASL auth ID is optional and if it's missing, like 'eve@EXAMPLE.COM', the authorization check will be skipped. As a result an arbitrary endpoint could join the cluster and begin propagating counterfeit changes to the leader, essentially giving it complete read-write access to the data tree. Quorum Peer authentication is not enabled by default. Users are recommended to upgrade to version 3.9.1, 3.8.3, 3.7.2, which fixes the issue. Alternately ensure the ensemble election/quorum communication is protected by a firewall as this will mitigate the issue. See the documentation for more details on correct cluster administration.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache ZooKeeper Affected: 3.9.0 , < 3.9.1 (maven)
Affected: 3.8.0 , ≤ 3.8.2 (maven)
Affected: 3.7.0 , ≤ 3.7.1 (maven)
Affected: 0 , < 3.7.0 (maven)
Create a notification for this product.
Credits
Damien Diederen <ddiederen@apache.org>
Show details on NVD website
To clipboard 

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Si la autenticaci\u00f3n SASL Quorum Peer est\u00e1 habilitada en ZooKeeper (quorum.auth.enableSasl=true), la autorizaci\u00f3n se realiza verificando que la parte de la instancia en el ID de autenticaci\u00f3n SASL aparece en la lista de servidores zoo.cfg. La parte de la instancia en el ID de autenticaci\u00f3n de SASL es opcional y si falta, como \u0027eve@EXAMPLE.COM\u0027, se omitir\u00e1 la verificaci\u00f3n de autorizaci\u00f3n. Como resultado, un endpoint arbitrario podr\u00eda unirse al cl\u00faster y comenzar a propagar cambios falsos al l\u00edder, d\u00e1ndole esencialmente acceso completo de lectura y escritura al \u00e1rbol de datos. La autenticaci\u00f3n de pares de qu\u00f3rum no est\u00e1 habilitada de forma predeterminada. Se recomienda a los usuarios actualizar a la versi\u00f3n 3.9.1, 3.8.3, 3.7.2, que soluciona el problema. Como alternativa, aseg\u00farese de que la comunicaci\u00f3n conjunta entre election y qu\u00f3rum est\u00e9 protegida por un firewall, ya que esto mitigar\u00e1 el problema. Consulte la documentaci\u00f3n para obtener m\u00e1s detalles sobre la correcta administraci\u00f3n del cl\u00faster.\"}],\"affected\":[{\"source\":\"security@apache.org\",\"affectedData\":[{\"vendor\":\"Apache Software Foundation\",\"product\":\"Apache ZooKeeper\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://repo.maven.apache.org/maven2\",\"packageName\":\"org.apache.zookeeper:zookeeper\",\"versions\":[{\"version\":\"3.9.0\",\"lessThan\":\"3.9.1\",\"versionType\":\"maven\",\"status\":\"affected\"},{\"version\":\"3.8.0\",\"lessThanOrEqual\":\"3.8.2\",\"versionType\":\"maven\",\"status\":\"affected\"},{\"version\":\"3.7.0\",\"lessThanOrEqual\":\"3.7.1\",\"versionType\":\"maven\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.7.0\",\"versionType\":\"maven\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N\",\"baseScore\":9.1,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":5.2},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N\",\"baseScore\":9.1,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":5.2}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-04-23T13:27:01.720908Z\",\"id\":\"CVE-2023-44981\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@apache.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-639\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:zookeeper:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"3.7.2\",\"matchCriteriaId\":\"EBEA9984-BE82-43F4-9FD9-08B3F28E0CAA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:zookeeper:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.8.0\",\"versionEndExcluding\":\"3.8.3\",\"matchCriteriaId\":\"58E6D5FE-5D28-44D2-9B6D-5CF5E79A7132\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:zookeeper:3.9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"99DE0202-11A5-44F7-99FA-58A71CB896AF\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"46D69DCC-AE4D-4EA5-861C-D60951444C6C\"}]}]}],\"references\":[{\"url\":\"http://www.openwall.com/lists/oss-security/2023/10/11/4\",\"source\":\"security@apache.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.apache.org/thread/wf0yrk84dg1942z1o74kd8nycg6pgm5b\",\"source\":\"security@apache.org\",\"tags\":[\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2023/10/msg00029.html\",\"source\":\"security@apache.org\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20240621-0007/\",\"source\":\"security@apache.org\"},{\"url\":\"https://www.debian.org/security/2023/dsa-5544\",\"source\":\"security@apache.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2023/10/11/4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.apache.org/thread/wf0yrk84dg1942z1o74kd8nycg6pgm5b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2023/10/msg00029.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20240621-0007/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.debian.org/security/2023/dsa-5544\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
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      "current_release_date": "2026-08-08T18:21:25+00:00",
      "cve": "CVE-2023-44981",
      "id": "CVE-2023-44981",
      "initial_release_date": "2023-10-11T00:00:00+00:00",
      "product_status:fixed": "4",
      "product_status:known_affected": "7",
      "product_status:known_not_affected": "3",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "zookeeper: Authorization Bypass in Apache ZooKeeper",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-44981.json",
      "version": "3"
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    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2025-12-19T01:19:43Z",
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      "id": "CVE-2023-44981",
      "initial_release_date": "2025-02-14T06:12:31Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-44981",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-44981.json",
      "version": "6"
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If SASL Quorum Peer authentication is enabled in ZooKeeper (quorum.auth.enableSasl=true), the authorization is done by verifying that the instance part in SASL authentication ID is listed in zoo.cfg server list. The instance part in SASL auth ID is optional and if it\u0027s missing, like \u0027eve@EXAMPLE.COM\u0027, the authorization check will be skipped.\\u00a0As a result an arbitrary endpoint could join the cluster and begin propagating counterfeit changes to the leader, essentially giving it complete read-write access to the data tree.\\u00a0Quorum Peer authentication is not enabled by default.\\n\\nUsers are recommended to upgrade to version 3.9.1, 3.8.3, 3.7.2, which fixes the issue.\\n\\nAlternately ensure the ensemble election/quorum communication is protected by a firewall as this will mitigate the issue.\\n\\nSee the documentation for more details on correct cluster administration.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Authorization Bypass Through User-Controlled Key vulnerability in Apache ZooKeeper. If SASL Quorum Peer authentication is enabled in ZooKeeper (\u003ccode\u003equorum.auth.enableSasl=\u003c/code\u003e\u003ccode\u003etrue)\u003c/code\u003e, the authorization is done by verifying that the instance part in SASL authentication ID is listed in zoo.cfg server list. The instance part in SASL auth ID is optional and if it\u0027s missing, like \u0027eve@EXAMPLE.COM\u0027, the authorization check will be skipped.\u0026nbsp;\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003eAs a result an arbitrary endpoint could join the cluster and begin propagating counterfeit changes to the leader, essentially giving it complete read-write access to the data tree.\u0026nbsp;\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003eQuorum Peer authentication is not enabled by default.\u003c/span\u003e\u003cbr\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan style=\\\"background-color: var(--wht);\\\"\u003eUsers are recommended to upgrade to version 3.9.1, 3.8.3, 3.7.2, which fixes the issue.\u003cbr\u003e\u003cbr\u003e\u003c/span\u003e\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003eAlternately ensure the ensemble election/quorum communication is protected by a firewall as this will mitigate the issue.\u003cbr\u003e\u003cbr\u003e\u003cspan style=\\\"background-color: rgb(255, 255, 255);\\\"\u003eSee the documentation for more details on correct cluster administration.\u003c/span\u003e\u003c/span\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-639\", \"description\": \"CWE-639 Authorization Bypass Through User-Controlled Key\"}]}], \"providerMetadata\": {\"orgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"shortName\": \"apache\", \"dateUpdated\": \"2024-06-21T19:08:15.553Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-44981\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-04-23T16:15:15.138Z\", \"dateReserved\": \"2023-10-02T08:44:58.183Z\", \"assignerOrgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"datePublished\": \"2023-10-11T11:55:47.925Z\", \"assignerShortName\": \"apache\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.