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CVE-2019-10191

Estado: ModificadaAlta (7.5)—

A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (2)

Fedoraproject — FedoraNIC — Knot Resolver

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2019-10191",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "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,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
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          "availabilityImpact": "LOW",
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          "confidentialityImpact": "LOW"
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    "cvssMetricV31": [
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          "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
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "CZ.NIC",
          "product": "knot-resolver",
          "versions": [
            {
              "status": "affected",
              "version": "all before 4.1.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2019-07-16T18:15:12.180",
  "references": [
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10191",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/",
      "source": "secalert@redhat.com"
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      "source": "secalert@redhat.com"
    },
    {
      "url": "https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html",
      "tags": [
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    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
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      "tags": [
        "Release Notes",
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      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
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      "type": "Secondary",
      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-20"
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    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol."
    },
    {
      "lang": "es",
      "value": "Se detectó una vulnerabilidad en la resolución de DNS de knot resolver anteriores a la versión 4.1.0, que permite a los atacantes remotos degradar los dominios seguros de DNSSEC a un estado no seguro de DNSSEC, abriendo la posibilidad de un secuestro de dominio mediante el uso de ataques contra el protocolo DNS no seguro."
    }
  ],
  "lastModified": "2026-06-17T02:10:27.320",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*",
              "vulnerable": true,
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              "versionEndExcluding": "4.1.0"
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  "sourceIdentifier": "secalert@redhat.com"
}