{
  "id": "CVE-2017-17671",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2017-12-14T00:29:00.217",
  "lastModified": "2020-08-14T18:26:00.053",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "vBulletin through 5.3.x on Windows allows remote PHP code execution because a require_once call is reachable with an unauthenticated request that can include directory traversal sequences to specify an arbitrary pathname, and because ../ traversal is blocked but ..\\ traversal is not blocked. For example, an attacker can make an invalid HTTP request containing PHP code, and then make an index.php?routestring= request with enough instances of \"..\" to reach an Apache HTTP Server log file."
    },
    {
      "lang": "es",
      "value": "vBulletin hasta las versiones 5.3.x en Windows permite la ejecuci\u00f3n remota de c\u00f3digo PHP debido a que una llamada require_once es alcanzable con una petici\u00f3n que puede incluir secuencias de salto de directorio para especificar un nombre de ruta arbitrario y porque el salto ../ est\u00e1 bloqueado, pero el salto ..\\ no lo est\u00e1. Por ejemplo, un atacante puede realizar una petici\u00f3n HTTP inv\u00e1lida que contiene c\u00f3digo PHP y, a continuaci\u00f3n, realizar una petici\u00f3n index.php?routestring= con las suficientes instancias de \"..\" para alcanzar un archivo de registro de Apache HTTP Server."
    }
  ],
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        "type": "Primary",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL"
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        "exploitabilityScore": 3.9,
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          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5
        },
        "baseSeverity": "HIGH",
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
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  "references": [
    {
      "url": "https://blogs.securiteam.com/index.php/archives/3569",
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
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}