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CVE-2021-20608

Estado: ModificadaAlta (7.5)—

Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric GX Works2 versions 1.606G and prior allows a remote unauthenticated attacker to cause a DoS condition in GX Works2 by getting GX Works2 to read a tampered program file from a Mitsubishi Electric PLC by sending malicious crafted packets to tamper with the program file.

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)

Mitsubishielectric — GX Works2

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-20608",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "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"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "GX Works2",
          "versions": [
            {
              "status": "affected",
              "version": "versions 1.606G and prior"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-12-17T17:15:11.937",
  "references": [
    {
      "url": "https://jvn.jp/vu/JVNVU93019896/index.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp"
    },
    {
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-350-04",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp"
    },
    {
      "url": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-020_en.pdf",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp"
    },
    {
      "url": "https://jvn.jp/vu/JVNVU93019896/index.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-350-04",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-020_en.pdf",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric GX Works2 versions 1.606G and prior allows a remote unauthenticated attacker to cause a DoS condition in GX Works2 by getting GX Works2 to read a tampered program file from a Mitsubishi Electric PLC by sending malicious crafted packets to tamper with the program file."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de Manejo Inapropiado de la Inconsistencia de los Parámetros de Longitud en Mitsubishi Electric GX Works2 versiones 1.606G y anteriores, permite a un atacante remoto no autenticado causar una condición de DoS en GX Works2 al conseguir que GX Works2 lea un archivo de programa manipulado de un PLC de Mitsubishi Electric mediante el envío de paquetes maliciosos diseñados para manipular el archivo de programa"
    }
  ],
  "lastModified": "2026-06-17T03:34:06.447",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mitsubishielectric:gx_works2:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "32F0E13C-4862-4A58-8F16-4E0D925FEA33",
              "versionEndIncluding": "1.606g"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp"
}