Vulnerability-Lookup

FKIE_CVE-2020-24336

Vulnerability from fkie_nvd - Published: 2020-12-11 23:15 - Updated: 2026-06-17 03:05

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5. The code for parsing Type A domain name answers in ip64-dns64.c doesn't verify whether the address in the answer's length is sane. Therefore, when copying an address of an arbitrary length, a buffer overflow can occur. This bug can be exploited whenever NAT64 is enabled.

References

URL	Tags
cve@mitre.org	https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01	Third Party Advisory, US Government Resource
cve@mitre.org	https://www.kb.cert.org/vuls/id/815128	Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108	https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01	Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108	https://www.kb.cert.org/vuls/id/815128	Third Party Advisory, US Government Resource

Impacted products

	Vendor	Product	Version
	contiki-ng	contiki-ng	*
	contiki-os	contiki	*

JSON

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:contiki-ng:contiki-ng:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "797897DD-5B41-4E84-98BE-1766F09114C2",
              "versionEndIncluding": "4.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:contiki-os:contiki:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EBD2BE71-F851-4136-816D-EF61154FD2C4",
              "versionEndIncluding": "3.0",
              "vulnerable": true
            }
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          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5. The code for parsing Type A domain name answers in ip64-dns64.c doesn\u0027t verify whether the address in the answer\u0027s length is sane. Therefore, when copying an address of an arbitrary length, a buffer overflow can occur. This bug can be exploited whenever NAT64 is enabled."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un problema en Contiki versiones hasta 3.0 y Contiki-NG versiones hasta 4.5.\u0026#xa0;El c\u00f3digo para analizar las respuestas de nombre de dominio Tipo A en el archivo ip64-dns64.c no verifica si la direcci\u00f3n en la longitud de la respuesta es sana.\u0026#xa0;Por lo tanto, cuando se copia una direcci\u00f3n de una longitud arbitraria, puede producirse un desbordamiento de b\u00fafer.\u0026#xa0;Este error puede ser explotado siempre que NAT64 est\u00e9 habilitado"
    }
  ],
  "id": "CVE-2020-24336",
  "lastModified": "2026-06-17T03:05:23.510",
  "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": "2020-12-11T23:15:13.870",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://www.kb.cert.org/vuls/id/815128"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "url": "https://www.kb.cert.org/vuls/id/815128"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2020-24336 (GCVE-0-2020-24336)

Vulnerability from cvelistv5 – Published: 2020-12-11 22:43 – Updated: 2024-08-04 15:12

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
https://www.kb.cert.org/vuls/id/815128	x_refsource_MISC
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01	x_refsource_MISC

Date Public

2020-12-08 00:00

Show details on NVD website

JSON

To clipboard

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          "url": "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01"
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      "x_legacyV4Record": {
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.