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CVE-2025-40908

Estado: AnalizadaCrítica (9.1)—

YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified

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).

🎯 Técnicas ATT&CK

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

AV:N/PR:N sin interacción permite explotación remota (T1190). CWE-552 (2-args open) permite modificar archivos existentes (T1565.001) y potencialmente leer datos sensibles (T1005).

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

Vulnerability ScanningRestrict File and Directory PermissionsPrivileged Account ManagementRemote Data StorageNetwork SegmentationLimit Access to Resource Over Network

Tecnologías afectadas (1)

Ingydotnet — Yaml-libyaml

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-40908",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-40908",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-06-02T03:22:02.219115Z"
        }
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          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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      "affectedData": [
        {
          "repo": "https://github.com/ingydotnet/yaml-libyaml-pm",
          "vendor": "TINITA",
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          "versions": [
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  "published": "2025-06-01T14:15:21.113",
  "references": [
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      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
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      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
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  "vulnStatus": "Analyzed",
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      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "description": [
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      "value": "YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified"
    },
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      "lang": "es",
      "value": "YAML-LibYAML anterior a 0.903.0 para Perl usa 2 argumentos abiertos, lo que permite modificar archivos existentes"
    }
  ],
  "lastModified": "2026-06-17T09:22:16.177",
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  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}