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CVE-2025-23016

Estado: AplazadaCrítica (9.3)—

FastCGI fcgi2 (aka fcgi) 2.x through 2.4.4 has an integer overflow (and resultant heap-based buffer overflow) via crafted nameLen or valueLen values in data to the IPC socket. This occurs in ReadParams in fcgiapp.c.

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.

Acceso local sin interacción (AV:L, UI:N, PR:N). Integer overflow en buffer heap permite ejecución de código o escalada de privilegios (C:H, I:H). Vector CVSS crítico con impacto de confidencialidad, integridad y disponibilidad.

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

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (1)

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

Fastcgi — Fcgi2AI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-23016",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-23016",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-09-19T03:55:14.343054Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "cve@mitre.org",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 9.3,
          "attackVector": "LOCAL",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 2.5
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "FastCGI",
          "product": "fcgi",
          "versions": [
            {
              "status": "affected",
              "version": "2.0.0",
              "versionType": "semver",
              "lessThanOrEqual": "2.4.4"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2025-01-10T12:15:25.480",
  "references": [
    {
      "url": "https://github.com/FastCGI-Archives/fcgi2/issues/67",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2025/04/23/4",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00009.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cve@mitre.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "FastCGI fcgi2 (aka fcgi) 2.x through 2.4.4 has an integer overflow (and resultant heap-based buffer overflow) via crafted nameLen or valueLen values in data to the IPC socket. This occurs in ReadParams in fcgiapp.c."
    },
    {
      "lang": "es",
      "value": "FastCGI fcgi2 (también conocido como fcgi) 2.x a 2.4.4 tiene un desbordamiento de enteros (y el desbordamiento de búfer basado en el montón resultante) a través de valores nameLen o valueLen manipulados en los datos del socket IPC. Esto ocurre en ReadParams en fcgiapp.c."
    }
  ],
  "lastModified": "2026-06-17T08:51:26.983",
  "sourceIdentifier": "cve@mitre.org"
}