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CVE-2020-9295

Estado: AnalizadaAlta (7.5)—

FortiOS 6.2 running AV engine version 6.00142 and below, FortiOS 6.4 running AV engine version 6.00144 and below and FortiClient 6.2 running AV engine version 6.00137 and below may not immediately detect certain types of malformed or non-standard RAR archives, potentially containing malicious files. Based on the samples provided, FortiClient will detect the malicious files upon trying extraction by real-time scanning and FortiGate will detect the malicious archive if Virus Outbreak Prevention is enabled.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Acceso remoto sin autenticación (AV:N/PR:N) a motor AV expuesto; falla en detectar RAR malformado causa DoS por consumo de recursos.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Fortinet — Antivirus Engine

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2020-9295",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2020-9295",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-03-17T14:23:16.479716Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "psirt@fortinet.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 4.7,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
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      {
        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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          "versions": [
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              "version": "6.2.0",
              "versionType": "semver",
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              "version": "6.0.0",
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  "published": "2025-03-17T14:15:16.903",
  "references": [
    {
      "url": "https://fortiguard.com/psirt/FG-IR-20-037",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@fortinet.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@fortinet.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-358"
        }
      ]
    }
  ],
  "descriptions": [
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      "lang": "en",
      "value": "FortiOS 6.2 running AV engine version 6.00142 and below, FortiOS 6.4 running AV engine version 6.00144 and below and FortiClient 6.2 running AV engine version 6.00137 and below may not immediately detect certain types of malformed or non-standard RAR archives, potentially containing malicious files. Based on the samples provided, FortiClient will detect the malicious files upon trying extraction by real-time scanning and FortiGate will detect the malicious archive if Virus Outbreak Prevention is enabled."
    },
    {
      "lang": "es",
      "value": "Es posible que FortiOS 6.2 con motor antivirus versión 6.00142 o inferior, FortiOS 6.4 con motor antivirus versión 6.00144 o inferior y FortiClient 6.2 con motor antivirus versión 6.00137 o inferior no detecten inmediatamente ciertos tipos de archivos RAR malformados o no estándar que podrían contener archivos maliciosos. Con base en las muestras proporcionadas, FortiClient detectará los archivos maliciosos al intentar extraerlos mediante análisis en tiempo real y FortiGate detectará el archivo malicioso si la Prevención de Brotes de Virus está activada."
    }
  ],
  "lastModified": "2026-06-17T03:27:43.167",
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