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CVE-2020-9399

Estado: ModificadaMedia (5.5)—

The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects versions before 12 definitions 200114-0 of Antivirus Pro, Antivirus Pro Plus, and Antivirus for Linux.

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 (3)

Avast — Antivirus FOR LinuxAvast — Antivirus PROAvast — Antivirus PRO Plus

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2020-9399",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-02-28T14:15:10.263",
  "references": [
    {
      "url": "https://blog.zoller.lu/p/tzo-23-2020-avast-generic-archive.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://seclists.org/fulldisclosure/2020/Feb/35",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://blog.zoller.lu/p/tzo-23-2020-avast-generic-archive.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://seclists.org/fulldisclosure/2020/Feb/35",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-436"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Avast AV parsing engine allows virus-detection bypass via a crafted ZIP archive. This affects versions before 12 definitions 200114-0 of Antivirus Pro, Antivirus Pro Plus, and Antivirus for Linux."
    },
    {
      "lang": "es",
      "value": "El motor de análisis de Avast AV permite la detección de virus por medio de un archivo ZIP diseñado. Esto afecta a las versiones anteriores a 12 definiciones de 200114-0 de Antivirus Pro, Antivirus Pro Plus y Antivirus para Linux."
    }
  ],
  "lastModified": "2026-06-17T03:27:52.777",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:avast:antivirus_for_linux:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2D67C721-9B5B-4753-A76D-1206D222B5C7",
              "versionEndExcluding": "12.0"
            },
            {
              "criteria": "cpe:2.3:a:avast:antivirus_pro:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C89FC3E4-F88F-4537-96E1-EF5F0C72B289",
              "versionEndExcluding": "12.0"
            },
            {
              "criteria": "cpe:2.3:a:avast:antivirus_pro_plus:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "404A3BDE-494C-4F0A-B267-777CD16D18B7",
              "versionEndExcluding": "12.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}