{
  "id": "CVE-2023-31421",
  "sourceIdentifier": "bressers@elastic.co",
  "published": "2023-10-26T04:15:16.000",
  "lastModified": "2024-11-21T08:01:49.633",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "It was discovered that when acting as TLS clients, Beats, Elastic Agent, APM Server, and Fleet Server did not verify whether the server certificate is valid for the target IP address; however, certificate signature validation is still performed. More specifically, when the client is configured to connect to an IP address (instead of a hostname) it does not validate the server certificate's IP SAN values against that IP address and certificate validation fails, and therefore the connection is not blocked as expected."
    },
    {
      "lang": "es",
      "value": "Se descubri\u00f3 que cuando actuaban como Clientes TLS, Beats, Elastic Agent, APM Server y Fleet Server no verificaban si el certificado del servidor es v\u00e1lido para la direcci\u00f3n IP de destino; sin embargo, a\u00fan se realiza la validaci\u00f3n de la firma del certificado. M\u00e1s espec\u00edficamente, cuando el cliente est\u00e1 configurado para conectarse a una direcci\u00f3n IP (en lugar de un nombre de host), no valida los valores IP SAN del certificado del servidor con esa direcci\u00f3n IP y la validaci\u00f3n del certificado falla y, por lo tanto, la conexi\u00f3n no se bloquea como se esperaba."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "bressers@elastic.co",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6
      },
      {
        "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:N/A:N",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "bressers@elastic.co",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ]
    },
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ]
    }
  ],
  "configurations": [
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      "nodes": [
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          "operator": "OR",
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
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              "versionEndIncluding": "8.9.2",
              "matchCriteriaId": "F350E05B-DF03-4D1F-95A4-4F6C14DD1640"
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              "versionEndIncluding": "8.9.2",
              "matchCriteriaId": "9CB5A9F5-BEFA-472C-A29B-4E71F2B19609"
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  "references": [
    {
      "url": "https://discuss.elastic.co/t/beats-elastic-agent-apm-server-and-fleet-server-8-10-1-security-update-improper-certificate-validation-issue-esa-2023-16/343385",
      "source": "bressers@elastic.co",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.elastic.co/community/security",
      "source": "bressers@elastic.co",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://discuss.elastic.co/t/beats-elastic-agent-apm-server-and-fleet-server-8-10-1-security-update-improper-certificate-validation-issue-esa-2023-16/343385",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.elastic.co/community/security",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}