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CVE-2017-6441

Estado: ModificadaAlta (7.5)—

** EN DISPUTA ** El _zval_get_long_func_ex en Zend/zend_operators.c en PHP 7.1.2 permite a atacantes provocar una denegación de servicio (referencia al puntero NULL y caída de la aplicación) a través del uso manipulado de "declare(ticks=" en el script PHP. NOTA:El proveedor disputará la clasificación de esto como una vulnerabilidad, declarando: "Por favor, no solicite CVEs para los errores ordinarios. CVEs son relevantes sólo para problemas de seguridad".

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).

Tecnologías afectadas (1)

PHP — PHP

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2017-6441",
  "cveTags": [
    {
      "tags": [
        "disputed"
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      "sourceIdentifier": "cve@mitre.org"
    }
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  "metrics": {
    "cvssMetricV2": [
      {
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        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "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"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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        "obtainOtherPrivilege": false,
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      }
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          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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      }
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  "affected": [
    {
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  "published": "2017-04-03T05:59:00.910",
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    {
      "url": "https://bugs.php.net/bug.php?id=74146",
      "tags": [
        "Issue Tracking"
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      "source": "cve@mitre.org"
    },
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      "url": "https://github.com/php/php-src/pull/2396",
      "tags": [
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      "source": "cve@mitre.org"
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    {
      "url": "https://bugs.php.net/bug.php?id=74146",
      "tags": [
        "Issue Tracking"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/php/php-src/pull/2396",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The _zval_get_long_func_ex in Zend/zend_operators.c in PHP 7.1.2 allows attackers to cause a denial of service (NULL pointer dereference and application crash) via crafted use of \"declare(ticks=\" in a PHP script. NOTE: the vendor disputes the classification of this as a vulnerability, stating \"Please do not request CVEs for ordinary bugs. CVEs are relevant for security issues only."
    },
    {
      "lang": "es",
      "value": "** EN DISPUTA ** El _zval_get_long_func_ex en Zend/zend_operators.c en PHP 7.1.2 permite a atacantes provocar una denegación de servicio (referencia al puntero NULL y caída de la aplicación) a través del uso manipulado de \"declare(ticks=\" en el script PHP. NOTA:El proveedor disputará la clasificación de esto como una vulnerabilidad, declarando: \"Por favor, no solicite CVEs para los errores ordinarios. CVEs son relevantes sólo para problemas de seguridad\"."
    }
  ],
  "lastModified": "2026-06-17T01:22:21.270",
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  "sourceIdentifier": "cve@mitre.org"
}