CVE-2020-10995

Estado: ModificadaAlta (7.5)—

PowerDNS Recursor from 4.1.0 up to and including 4.3.0 does not sufficiently defend against amplification attacks. An issue in the DNS protocol has been found that allow malicious parties to use recursive DNS services to attack third party authoritative name servers. The attack uses a crafted reply by an authoritative name server to amplify the resulting traffic between the recursive and other authoritative name servers. Both types of service can suffer degraded performance as an effect. This is triggered by random subdomains in the NSDNAME in NS records. PowerDNS Recursor 4.1.16, 4.2.2 and 4.3.1 contain a mitigation to limit the impact of this DNS protocol issue.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 4.48%
Percentil entre todas las CVEs puntuadas: 91
Fecha de la puntuación: 6/10/2026

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 (5)

Debian — Debian Linux Fedoraproject — Fedora Opensuse — Backports SLE Opensuse — Leap Powerdns — Recursor

CWE

CWE-400

Referencias

JSON original (NVD)

Mostrar

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  "id": "CVE-2020-10995",
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          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "impactScore": 2.9,
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        "obtainAllPrivilege": false,
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  "published": "2020-05-19T17:15:10.163",
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      "value": "PowerDNS Recursor from 4.1.0 up to and including 4.3.0 does not sufficiently defend against amplification attacks. An issue in the DNS protocol has been found that allow malicious parties to use recursive DNS services to attack third party authoritative name servers. The attack uses a crafted reply by an authoritative name server to amplify the resulting traffic between the recursive and other authoritative name servers. Both types of service can suffer degraded performance as an effect. This is triggered by random subdomains in the NSDNAME in NS records. PowerDNS Recursor 4.1.16, 4.2.2 and 4.3.1 contain a mitigation to limit the impact of this DNS protocol issue."
    },
    {
      "lang": "es",
      "value": "PowerDNS Recursor versiones desde 4.1.0 hasta 4.3.0 e incluyéndola, no defiende suficientemente contra los ataques de amplificación. Ha sido encontrado un problema en el protocolo DNS que permite a las partes maliciosas usar servicios DNS recursivos para atacar servidores de nombres autorizados por terceros. El ataque usa una respuesta diseñada por un servidor de nombres autorizados para amplificar el tráfico resultante entre los servidores de nombres recursivos y otros. Ambos tipos de servicio pueden sufrir un rendimiento degradado como un efecto. Esto es activado por subdominios aleatorios en NSDNAME en registros NS. PowerDNS Recursor versiones 4.1.16, 4.2.2 y 4.3.1, contienen una mitigación para limitar el impacto de este problema del protocolo DNS."
    }
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  "lastModified": "2026-06-17T02:48:49.600",
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