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CVE-2018-9951

Estado: ModificadaAlta (8.8)—💥 PoC

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of CPDF_Object objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code under the context of the current process. Was ZDI-CAN-5414.

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.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (2)

Foxitsoftware — Foxit ReaderFoxitsoftware — Phantompdf

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-9951",
  "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": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "zdi-disclosures@trendmicro.com",
      "affectedData": [
        {
          "vendor": "Foxit",
          "product": "Foxit Reader",
          "versions": [
            {
              "status": "affected",
              "version": "9.0.0.29935"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-05-17T15:29:02.630",
  "references": [
    {
      "url": "https://www.foxitsoftware.com/support/security-bulletins.php",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "zdi-disclosures@trendmicro.com"
    },
    {
      "url": "https://zerodayinitiative.com/advisories/ZDI-18-335",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "zdi-disclosures@trendmicro.com"
    },
    {
      "url": "https://www.foxitsoftware.com/support/security-bulletins.php",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://zerodayinitiative.com/advisories/ZDI-18-335",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "zdi-disclosures@trendmicro.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of CPDF_Object objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code under the context of the current process. Was ZDI-CAN-5414."
    },
    {
      "lang": "es",
      "value": "Esta vulnerabilidad permite que los atacantes remotos ejecuten código arbitrario en instalaciones vulnerables de Foxit Reader 9.0.0.29935. Se requiere de interacción del usuario para explotar esta vulnerabilidad en la que el objetivo debe visitar una página maliciosa o abrir un archivo malicioso. Este error en concreto existe en el análisis de objetos CPDF_Object. El problema deriva de la falta de validación de la existencia de un objeto previa a la realización de operaciones sobre el objeto. Un atacante podría aprovecharse de esta vulnerabilidad para ejecutar código en el contexto del actual proceso. Anteriormente era ZDI-CAN-5414."
    }
  ],
  "lastModified": "2026-06-17T02:07:22.657",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:foxitsoftware:foxit_reader:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E7A58B63-E44D-4EDE-BE3D-D2F1502224C2",
              "versionEndIncluding": "9.0.1.1049"
            },
            {
              "criteria": "cpe:2.3:a:foxitsoftware:phantompdf:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "38BDD119-28A6-4DBE-83D8-05F7254AF603",
              "versionEndIncluding": "9.0.1.1049"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "zdi-disclosures@trendmicro.com"
}