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CVE-2009-1271

Estado: ModificadaMedia (5)—
Gravedad5Media · CVSS 2.0
Probabilidad de explotación2.40 %mayor que el 84 % de las CVE
Explotación activaNono figura en el catálogo de CISA
Exploit públicoNo conocidosin código público localizado

La función JSON_parser (ext/json/JSON_parser.c) en PHP v5.2.x anteriores a v5.2.9 permite a atacantes remotos provocar una denegación de servicio (falta de segmentación) a través de una cadena formada de forma incorrecta a la función API json_decode.

CVSS

Puntuación base
5
Versión
2.0
Vector
AV:N/AC:L/Au:N/C:N/I:N/A:P

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días
2.40 %
Percentil entre todas las CVEs puntuadas
84
Fecha de la puntuación
24/10/2026

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 (1)

PHP — PHP

CWE

Referencias

Mostrar las 44 referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2009-1271",
  "cveTags": [],
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "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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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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  "published": "2009-04-08T18:30:00.187",
  "references": [
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  ],
  "vulnStatus": "Modified",
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The JSON_parser function (ext/json/JSON_parser.c) in PHP 5.2.x before 5.2.9 allows remote attackers to cause a denial of service (segmentation fault) via a malformed string to the json_decode API function."
    },
    {
      "lang": "es",
      "value": "La función JSON_parser (ext/json/JSON_parser.c) en PHP v5.2.x anteriores a v5.2.9 permite a atacantes remotos provocar una denegación de servicio (falta de segmentación) a través de una cadena formada de forma incorrecta a la función API json_decode.\r\n"
    }
  ],
  "lastModified": "2026-06-16T23:06:54.820",
  "configurations": [
    {
      "nodes": [
        {
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            {
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          "operator": "OR"
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  ],
  "vendorComments": [
    {
      "comment": "This issue did not affect PHP versions as shipped in Red Hat Enterprise Linux 2.1, 3, 4, and 5, and Red Hat Application Stack v1. PHP version in Red Hat Application Stack v2 was fixed via: https://rhn.redhat.com/errata/RHSA-2009-0350.html",
      "lastModified": "2009-04-15T00:00:00",
      "organization": "Red Hat"
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}