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CVE-2018-12243

Estado: ModificadaAlta (8.8)—

The Symantec Messaging Gateway product prior to 10.6.6 may be susceptible to a XML external entity (XXE) exploit, which is a type of issue where XML input containing a reference to an external entity is processed by a weakly configured XML parser. The attack uses file URI schemes or relative paths in the system identifier to access files that should not normally be accessible.

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)

Symantec — Messaging Gateway

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-12243",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.8,
          "accessVector": "ADJACENT_NETWORK",
          "vectorString": "AV:A/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": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.5,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 8.8,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:A/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"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "secure@symantec.com",
      "affectedData": [
        {
          "vendor": "Symantec Corporation",
          "product": "Symantec Messaging Gateway",
          "versions": [
            {
              "status": "affected",
              "version": "Prior to 10.6.6"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-09-19T15:29:19.217",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/105330",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@symantec.com"
    },
    {
      "url": "https://support.symantec.com/en_US/article.SYMSA1461.html",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "secure@symantec.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/105330",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://support.symantec.com/en_US/article.SYMSA1461.html",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-611"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Symantec Messaging Gateway product prior to 10.6.6 may be susceptible to a XML external entity (XXE) exploit, which is a type of issue where XML input containing a reference to an external entity is processed by a weakly configured XML parser. The attack uses file URI schemes or relative paths in the system identifier to access files that should not normally be accessible."
    },
    {
      "lang": "es",
      "value": "El producto Symantec Messaging Gateway en versiones anteriores a la 10.6.6 puede ser susceptible a una explotación XXE (XML External Entity), que es un tipo de vulnerabilidad en el que los XML entrantes que contengan una referencia a una entidad externa son procesados por un analizador XML con una configuración débil. El ataque utiliza esquemas URI de archivos o rutas relativas en el identificador del sistema para acceder a archivos que no deberían normalmente ser accesibles."
    }
  ],
  "lastModified": "2026-06-17T01:37:24.900",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:symantec:messaging_gateway:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D25EDB76-F75D-4C5E-9122-EB4F520D569D",
              "versionEndExcluding": "10.6.6"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@symantec.com"
}