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CVE-2007-1521

Estado: ModificadaMedia (6.8)—Exploit
Gravedad6.8Media · CVSS 2.0
Probabilidad de explotación8.61 %mayor que el 95 % de las CVE
Explotación activaNono figura en el catálogo de CISA
Exploit públicoDisponiblePublicado en Exploit-DB

Una vulnerabilidad de doble liberación en PHP versiones anteriores a 4.4.7, y versiones 5.x anteriores a 5.2.2, permite a atacantes dependiendo del contexto ejecutar código arbitrario mediante la interrupción de la función session_regenerate_id, como es demostrado mediante la llamada de un manejador de errores de espacio de usuario o desencadenando una violación de límite de memoria.

CVSS

Puntuación base
6.8
Versión
2.0
Vector
AV:N/AC:M/Au:N/C:P/I:P/A:P

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días
8.61 %
Percentil entre todas las CVEs puntuadas
95
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).

Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

Tecnologías afectadas (1)

PHP — PHP

CWE

Referencias

Mostrar las 42 referencias

JSON original (NVD)

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{
  "id": "CVE-2007-1521",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": true,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2007-03-20T20:19:00.000",
  "references": [
    {
      "url": "http://docs.info.apple.com/article.html?artnum=306172",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.apple.com/archives/security-announce//2007/Jul/msg00004.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/24505",
      "tags": [
        "Vendor Advisory"
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      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/25025",
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      "source": "cve@mitre.org"
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    {
      "url": "http://secunia.com/advisories/25056",
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    {
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    {
      "url": "http://secunia.com/advisories/25062",
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    {
      "url": "http://security.gentoo.org/glsa/glsa-200705-19.xml",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://us2.php.net/releases/4_4_7.php",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://us2.php.net/releases/5_2_2.php",
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    {
      "url": "http://www.debian.org/security/2007/dsa-1282",
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    {
      "url": "http://www.debian.org/security/2007/dsa-1283",
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    },
    {
      "url": "http://www.novell.com/linux/security/advisories/2007_32_php.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.php-security.org/MOPB/MOPB-22-2007.html",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/22968",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/25159",
      "source": "cve@mitre.org"
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    {
      "url": "http://www.ubuntu.com/usn/usn-455-1",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2007/0960",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2007/2732",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://docs.info.apple.com/article.html?artnum=306172",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.apple.com/archives/security-announce//2007/Jul/msg00004.html",
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      "url": "http://secunia.com/advisories/24505",
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    },
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    },
    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://us2.php.net/releases/4_4_7.php",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://us2.php.net/releases/5_2_2.php",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.debian.org/security/2007/dsa-1282",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://www.debian.org/security/2007/dsa-1283",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.novell.com/linux/security/advisories/2007_32_php.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.php-security.org/MOPB/MOPB-22-2007.html",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://www.securityfocus.com/bid/22968",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "http://www.securityfocus.com/bid/25159",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "http://www.vupen.com/english/advisories/2007/0960",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "http://www.vupen.com/english/advisories/2007/2732",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Double free vulnerability in PHP before 4.4.7, and 5.x before 5.2.2, allows context-dependent attackers to execute arbitrary code by interrupting the session_regenerate_id function, as demonstrated by calling a userspace error handler or triggering a memory limit violation."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de doble liberación en PHP versiones anteriores a 4.4.7, y versiones 5.x anteriores a 5.2.2, permite a atacantes dependiendo del contexto ejecutar código arbitrario mediante la interrupción de la función session_regenerate_id, como es demostrado mediante la llamada de un manejador de errores de espacio de usuario o desencadenando una violación de límite de memoria."
    }
  ],
  "lastModified": "2026-06-16T22:37:45.100",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FEE12690-B08D-4AB2-8092-013DE1A33C4C",
              "versionEndIncluding": "5.2.1"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "vendorComments": [
    {
      "comment": "The PHP interpreter does not offer a reliable "sandboxed" security\nlayer (as found in, say, a JVM) in which untrusted scripts can be run;\nany script run by the PHP interpreter must be trusted with the\nprivileges of the interpreter itself.  We therefore do not classify\nthis issue as security-sensitive since no trust boundary is crossed.\n",
      "lastModified": "2007-04-16T00:00:00",
      "organization": "Red Hat"
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}