FKIE_CVE-2020-27488

Vulnerability from fkie_nvd - Published: 2021-01-13 20:15 - Updated: 2026-06-17 03:09
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Loxone Miniserver devices with firmware before 11.1 (aka 11.1.9.3) are unable to use an authentication method that is based on the "signature of the update package." Therefore, these devices (or attackers who are spoofing these devices) can continue to use an unauthenticated cloud service for an indeterminate time period (possibly forever). Once an individual device's firmware is updated, and authentication occurs once, the cloud service recategorizes the device so that authentication is subsequently always required, and spoofing cannot occur.
References
cve@mitre.orghttps://iot-lab-fh-ooe.github.io/loxone_clouddns_schwachstelle/Exploit, Third Party Advisory
cve@mitre.orghttps://iot-lab-fh-ooe.github.io/loxone_clouddns_vulnerability/Exploit, Third Party Advisory
cve@mitre.orghttps://www.loxone.com/dede/sicherheit-cloud-dns/Product, Vendor Advisory
cve@mitre.orghttps://www.loxone.com/enen/security-cloud-dns/Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://iot-lab-fh-ooe.github.io/loxone_clouddns_schwachstelle/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://iot-lab-fh-ooe.github.io/loxone_clouddns_vulnerability/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.loxone.com/dede/sicherheit-cloud-dns/Product, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.loxone.com/enen/security-cloud-dns/Vendor Advisory
Impacted products
Vendor Product Version
loxone miniserver_gen_1_firmware *
loxone miniserver_gen_1 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:loxone:miniserver_gen_1_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "605835BD-3E95-4AB5-8C02-DDF3A9884F99",
              "versionEndExcluding": "11.1.9.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:loxone:miniserver_gen_1:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "AC6B26A5-91F3-41B1-B13F-8AC73B7FEA3C",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Loxone Miniserver devices with firmware before 11.1 (aka 11.1.9.3) are unable to use an authentication method that is based on the \"signature of the update package.\" Therefore, these devices (or attackers who are spoofing these devices) can continue to use an unauthenticated cloud service for an indeterminate time period (possibly forever). Once an individual device\u0027s firmware is updated, and authentication occurs once, the cloud service recategorizes the device so that authentication is subsequently always required, and spoofing cannot occur."
    },
    {
      "lang": "es",
      "value": "Los dispositivos Loxone Miniserver con versiones de firmware anteriores a 11.1 (tambi\u00e9n se conoce como versi\u00f3n 11.1.9.3) no pueden utilizar un m\u00e9todo de autenticaci\u00f3n que se base en la \"signature of the update package\".\u0026#xa0;Por lo tanto, estos dispositivos (o atacantes que falsifican estos dispositivos) pueden continuar usando un servicio en la nube no autenticado durante un per\u00edodo de tiempo indeterminado (posiblemente para siempre).\u0026#xa0;Una vez que el firmware es actualizado de un dispositivo individual y la autenticaci\u00f3n ocurre una vez, el servicio en la nube recategoriza el dispositivo para que la autenticaci\u00f3n sea posteriormente requerida siempre y no pueda ocurrir una suplantaci\u00f3n de identidad."
    }
  ],
  "id": "CVE-2020-27488",
  "lastModified": "2026-06-17T03:09:15.513",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-01-13T20:15:12.813",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://iot-lab-fh-ooe.github.io/loxone_clouddns_schwachstelle/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://iot-lab-fh-ooe.github.io/loxone_clouddns_vulnerability/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Product",
        "Vendor Advisory"
      ],
      "url": "https://www.loxone.com/dede/sicherheit-cloud-dns/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.loxone.com/enen/security-cloud-dns/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://iot-lab-fh-ooe.github.io/loxone_clouddns_schwachstelle/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://iot-lab-fh-ooe.github.io/loxone_clouddns_vulnerability/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product",
        "Vendor Advisory"
      ],
      "url": "https://www.loxone.com/dede/sicherheit-cloud-dns/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.loxone.com/enen/security-cloud-dns/"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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