CVE-2025-30194

Estado: AplazadaAlta (7.5)—

When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service.

The remedy is: upgrade to the patched 1.9.9 version.

A workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version.

We would like to thank Charles Howes for bringing this issue to our attention.

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: 2.25%
Percentil entre todas las CVEs puntuadas: 82
Fecha de la puntuación: 5/10/2026

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access60 %
Impacto principalT1499 Endpoint Denial of Serviceimpact55 %

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network Traffic Vulnerability Scanning Privileged Account Management Network Segmentation Limit Access to Resource Over Network Application Isolation and Sandboxing

Tecnologías afectadas (3)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

H2O — H2O^AI Nghttp2 — Nghttp2^AI Powerdns — Dnsdist^AI

CWE

CWE-416

Referencias

JSON original (NVD)

Mostrar

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          "repo": "https://github.com/PowerDNS/pdns",
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          "modules": [
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      "value": "When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service.\n\nThe remedy is: upgrade to the patched 1.9.9 version.\n\nA workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version.\n\nWe would like to thank Charles Howes for bringing this issue to our attention."
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      "value": "Cuando DNSdist está configurado para proporcionar DoH a través del proveedor nghttp2, un atacante puede provocar una denegación de servicio creando un intercambio de DoH que desencadena un acceso ilegal a memoria (doble liberación) y el bloqueo de DNSdist, lo que provoca una denegación de servicio. La solución es actualizar a la versión 1.9.9 parcheada. Una alternativa es cambiar temporalmente al proveedor h2o hasta que DNSdist se actualice a una versión corregida. Agradecemos a Charles Howes por informarnos sobre este problema."
    }
  ],
  "lastModified": "2026-06-17T09:08:19.793",
  "sourceIdentifier": "security@open-xchange.com"
}