FKIE_CVE-2019-19794

Vulnerability from fkie_nvd - Published: 2019-12-13 22:15 - Updated: 2026-06-17 02:27
Severity
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Summary
The miekg Go DNS package before 1.1.25, as used in CoreDNS before 1.6.6 and other products, improperly generates random numbers because math/rand is used. The TXID becomes predictable, leading to response forgeries.
References
cve@mitre.orghttps://github.com/coredns/coredns/issues/3519Issue Tracking, Third Party Advisory
cve@mitre.orghttps://github.com/coredns/coredns/issues/3547Third Party Advisory
cve@mitre.orghttps://github.com/miekg/dns/compare/v1.1.24...v1.1.25Release Notes, Third Party Advisory
cve@mitre.orghttps://github.com/miekg/dns/issues/1043Exploit, Issue Tracking, Third Party Advisory
cve@mitre.orghttps://github.com/miekg/dns/pull/1044Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/coredns/coredns/issues/3519Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/coredns/coredns/issues/3547Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/miekg/dns/compare/v1.1.24...v1.1.25Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/miekg/dns/issues/1043Exploit, Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/miekg/dns/pull/1044Patch, Third Party Advisory
Impacted products
Vendor Product Version
miekg-dns_project miekg-dns *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:miekg-dns_project:miekg-dns:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0F0F7709-230B-4274-AF38-B3704AD451AB",
              "versionEndExcluding": "1.1.25",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The miekg Go DNS package before 1.1.25, as used in CoreDNS before 1.6.6 and other products, improperly generates random numbers because math/rand is used. The TXID becomes predictable, leading to response forgeries."
    },
    {
      "lang": "es",
      "value": "El paquete DNS de miekg Go versiones anteriores a la versi\u00f3n 1.1.25, como es usado en CoreDNS versiones anteriores a la versi\u00f3n  1.6.6 y otros productos, genera n\u00fameros aleatorios inapropiadamente porque math/rand es usado. El TXID se vuelve predecible, conllevando a falsificaciones de respuesta."
    }
  ],
  "id": "CVE-2019-19794",
  "lastModified": "2026-06-17T02:27:15.643",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "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": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2019-12-13T22:15:11.357",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://github.com/coredns/coredns/issues/3519"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/coredns/coredns/issues/3547"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "url": "https://github.com/miekg/dns/compare/v1.1.24...v1.1.25"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://github.com/miekg/dns/issues/1043"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/miekg/dns/pull/1044"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://github.com/coredns/coredns/issues/3519"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/coredns/coredns/issues/3547"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "url": "https://github.com/miekg/dns/compare/v1.1.24...v1.1.25"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://github.com/miekg/dns/issues/1043"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/miekg/dns/pull/1044"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-338"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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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

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • 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.



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