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CVE-2017-16894

Estado: ModificadaAlta (7.5)—💥 Exploit

En el framework Laravel hasta la versión 5.5.21, los atacantes remotos pueden obtener información sensible (como contraseñas de uso externo) mediante una petición directa para la URI /.env. NOTA: este CVE solo trata de la función writeNewEnvironmentFileWith del framework Laravel en src/Illuminate/Foundation/Console/KeyGenerateCommand.php que utiliza file_put_contents sin restringir los permisos .env. El nombre de archivo .env no es de uso exclusivo del framework Laravel.

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).

💥 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)

Laravel — Laravel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2017-16894",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2017-11-20T01:29:00.227",
  "references": [
    {
      "url": "http://packetstormsecurity.com/files/153641/PHP-Laravel-Framework-Token-Unserialize-Remote-Command-Execution.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://whiteboyz.xyz/laravel-env-file-vuln.html",
      "tags": [
        "Third Party Advisory",
        "URL Repurposed"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://twitter.com/finnwea/status/967709791442341888",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://packetstormsecurity.com/files/153641/PHP-Laravel-Framework-Token-Unserialize-Remote-Command-Execution.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://whiteboyz.xyz/laravel-env-file-vuln.html",
      "tags": [
        "Third Party Advisory",
        "URL Repurposed"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://twitter.com/finnwea/status/967709791442341888",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Laravel framework through 5.5.21, remote attackers can obtain sensitive information (such as externally usable passwords) via a direct request for the /.env URI. NOTE: this CVE is only about Laravel framework's writeNewEnvironmentFileWith function in src/Illuminate/Foundation/Console/KeyGenerateCommand.php, which uses file_put_contents without restricting the .env permissions. The .env filename is not used exclusively by Laravel framework."
    },
    {
      "lang": "es",
      "value": "En el framework Laravel hasta la versión 5.5.21, los atacantes remotos pueden obtener información sensible (como contraseñas de uso externo) mediante una petición directa para la URI /.env. NOTA: este CVE solo trata de la función writeNewEnvironmentFileWith del framework Laravel en src/Illuminate/Foundation/Console/KeyGenerateCommand.php que utiliza file_put_contents sin restringir los permisos .env. El nombre de archivo .env no es de uso exclusivo del framework Laravel."
    }
  ],
  "lastModified": "2026-06-17T01:10:06.353",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:laravel:laravel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A8C7A7F1-FA13-4CC6-A7C0-8D40775CB404",
              "versionEndIncluding": "5.5.21"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}