FKIE_CVE-2020-27222

Vulnerability from fkie_nvd - Published: 2021-02-03 16:15 - Updated: 2026-06-17 03:08
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In Eclipse Californium version 2.3.0 to 2.6.0, the certificate based (x509 and RPK) DTLS handshakes accidentally fails, because the DTLS server side sticks to a wrong internal state. That wrong internal state is set by a previous certificate based DTLS handshake failure with TLS parameter mismatch. The DTLS server side must be restarted to recover this. This allow clients to force a DoS.
References
emo@eclipse.orghttps://bugs.eclipse.org/bugs/show_bug.cgi?id=570844Permissions Required, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugs.eclipse.org/bugs/show_bug.cgi?id=570844Permissions Required, Vendor Advisory
Impacted products
Vendor Product Version
eclipse californium *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Eclipse Californium",
          "vendor": "The Eclipse Foundation",
          "versions": [
            {
              "status": "affected",
              "version": "[2.3.0, 2.6.0]"
            }
          ]
        }
      ],
      "source": "emo@eclipse.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:eclipse:californium:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "56884583-F1FF-412F-B5E6-0AD0F904F260",
              "versionEndIncluding": "2.6.0",
              "versionStartIncluding": "2.3.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Eclipse Californium version 2.3.0 to 2.6.0, the certificate based (x509 and RPK) DTLS handshakes accidentally fails, because the DTLS server side sticks to a wrong internal state. That wrong internal state is set by a previous certificate based DTLS handshake failure with TLS parameter mismatch. The DTLS server side must be restarted to recover this. This allow clients to force a DoS."
    },
    {
      "lang": "es",
      "value": "En Eclipse Californium versiones 2.3.0 hasta 2.6.0, los protocolos de enlace DTLS basados ??en certificados (x509 y RPK) cometen un fallo accidentalmente, porque el lado del servidor DTLS se adhiere a un estado interno equivocado.\u0026#xa0;Ese estado interno equivocado es ajustado por medio de un fallo de protocolo de enlace DTLS basada en un certificado anterior con una falta de coincidencia de los par\u00e1metros TLS.\u0026#xa0;El lado del servidor DTLS debe reiniciarse para recuperar esto.\u0026#xa0;Esto permite a clientes forzar una DoS"
    }
  ],
  "id": "CVE-2020-27222",
  "lastModified": "2026-06-17T03:08:59.540",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-02-03T16:15:13.117",
  "references": [
    {
      "source": "emo@eclipse.org",
      "tags": [
        "Permissions Required",
        "Vendor Advisory"
      ],
      "url": "https://bugs.eclipse.org/bugs/show_bug.cgi?id=570844"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Permissions Required",
        "Vendor Advisory"
      ],
      "url": "https://bugs.eclipse.org/bugs/show_bug.cgi?id=570844"
    }
  ],
  "sourceIdentifier": "emo@eclipse.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-372"
        }
      ],
      "source": "emo@eclipse.org",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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