CVE-2025-61584

Estado: AplazadaCrítica (9.3)—

serverless-dns is a RethinkDNS resolver that deploys to Cloudflare Workers, Deno Deploy, Fastly, and Fly.io. Versions through abd including 0.1.30 have a vulnerability where the pr.yml GitHub Action interpolates in an unsafe manner untrusted input, specifically the github.event.pull_request.head.repo.clone_url and github.head_ref, to a command in the runner. Due to the action using the pull_request_target trigger it has permissive permissions by default. An unauthorized attacker can exploit this vulnerability to push arbitrary data to the repository. The subsequent impact on the end-user is executing the attackers' code when running serverless-dns. This is fixed in commit c5537dd, and expected to be released in 0.1.31.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 9.3

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.37%
Percentil entre todas las CVEs puntuadas: 28
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.

ExplotaciónT1195 Supply Chain Compromiseinitial access85 %
Impacto principalT1059 Command and Scripting Interpreterexecution80 %
Impacto secundarioT1565.002 Transmitted Data Manipulationimpact75 %

Vulnerabilidad en GitHub Action (pr.yml) que interpola inseguramente parámetros de pull_request_target, permitiendo envenenar la cadena de suministro (T1195) para inyectar código malicioso (T1059) en repositorio y ejecución posterior en usuarios.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Limit Software Installation Application Developer Guidance Vulnerability Scanning User Account Management Restrict Web-Based Content Privileged Account Management

Tecnologías afectadas (5)

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

Cloudflare — Workers^AI Deno — Deploy^AI Fastly — Fastly^AI Rekinddns — Serverless-dns^AI Scala-sbt — IO^AI

CWE

CWE-77

Referencias

JSON original (NVD)

Mostrar

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  "published": "2025-09-30T11:37:41.910",
  "references": [
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      "url": "https://github.com/serverless-dns/serverless-dns/commit/c5537dd7f203c59f2b86d1e295c2371f3533946a",
      "source": "security-advisories@github.com"
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      "lang": "en",
      "value": "serverless-dns is a RethinkDNS resolver that deploys to Cloudflare Workers, Deno Deploy, Fastly, and Fly.io. Versions through abd including 0.1.30 have a vulnerability where the pr.yml GitHub Action interpolates in an unsafe manner untrusted input, specifically the github.event.pull_request.head.repo.clone_url and github.head_ref, to a command in the runner. Due to the action using the pull_request_target trigger it has permissive permissions by default. An unauthorized attacker can exploit this vulnerability to push arbitrary data to the repository. The subsequent impact on the end-user is executing the attackers' code when running serverless-dns. This is fixed in commit c5537dd, and expected to be released in 0.1.31."
    },
    {
      "lang": "es",
      "value": "serverless-dns es un resolvedor de RethinkDNS que se despliega en Cloudflare Workers, Deno Deploy, Fastly y Fly.io. Las versiones hasta e incluyendo la 0.1.30 tienen una vulnerabilidad donde la Acción de GitHub pr.yml interpola de manera insegura entrada no confiable, específicamente github.event.pull_request.head.repo.clone_url y github.head_ref, a un comando en el ejecutor. Debido a que la acción utiliza el disparador pull_request_target, tiene permisos permisivos por defecto. Un atacante no autorizado puede explotar esta vulnerabilidad para enviar datos arbitrarios al repositorio. El impacto subsiguiente en el usuario final es la ejecución del código del atacante al ejecutar serverless-dns. Esto está corregido en el commit c5537dd, y se espera que sea lanzado en la 0.1.31."
    }
  ],
  "lastModified": "2026-06-17T09:50:36.190",
  "sourceIdentifier": "security-advisories@github.com"
}