FKIE_CVE-2021-20237

Vulnerability from fkie_nvd - Published: 2021-05-28 11:15 - Updated: 2024-11-21 05:46
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
An uncontrolled resource consumption (memory leak) flaw was found in ZeroMQ's src/xpub.cpp in versions before 4.3.3. This flaw allows a remote unauthenticated attacker to send crafted PUB messages that consume excessive memory if the CURVE/ZAP authentication is disabled on the server, causing a denial of service. The highest threat from this vulnerability is to system availability.
References
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1921989Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://github.com/zeromq/libzmq/security/advisories/GHSA-4p5v-h92w-6wxwPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1921989Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/zeromq/libzmq/security/advisories/GHSA-4p5v-h92w-6wxwPatch, Third Party Advisory
Impacted products
Vendor Product Version
zeromq libzmq *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:zeromq:libzmq:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C1384189-AC6C-4847-A3BF-FB7A3A826F75",
              "versionEndExcluding": "4.3.3",
              "versionStartIncluding": "4.2.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An uncontrolled resource consumption (memory leak) flaw was found in ZeroMQ\u0027s src/xpub.cpp in versions before 4.3.3. This flaw allows a remote unauthenticated attacker to send crafted PUB messages that consume excessive memory if the CURVE/ZAP authentication is disabled on the server, causing a denial of service. The highest threat from this vulnerability is to system availability."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 un fallo de consumo de recursos incontrolado (filtrado de memoria) en el archivo src/xpub.cpp de ZeroMQ en versiones anteriores a 4.3.3.\u0026#xa0;Este fallo permite a un atacante remoto no autenticado enviar mensajes PUB dise\u00f1ados que consumen memoria excesiva si la autenticaci\u00f3n CURVE/ZAP est\u00e1 deshabilitada en el servidor, causando una denegaci\u00f3n de servicio.\u0026#xa0;La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema"
    }
  ],
  "id": "CVE-2021-20237",
  "lastModified": "2024-11-21T05:46:11.477",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-05-28T11:15:07.970",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1921989"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/zeromq/libzmq/security/advisories/GHSA-4p5v-h92w-6wxw"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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        "Third Party Advisory"
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1921989"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
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      "url": "https://github.com/zeromq/libzmq/security/advisories/GHSA-4p5v-h92w-6wxw"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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