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CVE-2018-11407

Estado: ModificadaCrítica (9.8)—

An issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a "null" password and valid username, which triggers an unauthenticated bind. NOTE: this issue exists because of an incomplete fix for CVE-2016-2403.

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)

Sensiolabs — Symfony

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-11407",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
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  "affected": [
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      "source": "cve@mitre.org",
      "affectedData": [
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          "product": "n/a",
          "versions": [
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              "version": "n/a"
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  "published": "2018-06-13T16:29:01.047",
  "references": [
    {
      "url": "https://symfony.com/blog/cve-2018-11407-unauthorized-access-on-a-misconfigured-ldap-server-when-using-an-empty-password",
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  "vulnStatus": "Modified",
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      "description": [
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          "value": "CWE-287"
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    }
  ],
  "descriptions": [
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      "lang": "en",
      "value": "An issue was discovered in the Ldap component in Symfony 2.8.x before 2.8.37, 3.3.x before 3.3.17, 3.4.x before 3.4.7, and 4.0.x before 4.0.7. It allows remote attackers to bypass authentication by logging in with a \"null\" password and valid username, which triggers an unauthenticated bind.  NOTE: this issue exists because of an incomplete fix for CVE-2016-2403."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto un problema en el componente Ldap en Symfony en versiones 2.8.x anteriores a la 2.8.37, versiones 3.3.x anteriores a la 3.3.17, versiones 3.4.x anteriores a la 3.4.7, y versiones 4.0.x anteriores a la 4.0.7. Permite que atacantes remotos omitan la autenticación mediante el inicio de sesión con una contraseña \"null\" y un nombre de usuario válido, lo que desencadena un enlace no autenticado. NOTA: este problema existe debido a una solución incompleta para CVE-2016-2403."
    }
  ],
  "lastModified": "2026-06-17T01:35:52.347",
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