Vulnerability-Lookup

FKIE_CVE-2020-10071

Vulnerability from fkie_nvd - Published: 2020-06-05 18:15 - Updated: 2026-06-17 02:47

Severity

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

Summary

The Zephyr MQTT parsing code performs insufficient checking of the length field on publish messages, allowing a buffer overflow and potentially remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.

References

URL	Tags
vulnerabilities@zephyrproject.org	https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10071	Vendor Advisory
vulnerabilities@zephyrproject.org	https://github.com/zephyrproject-rtos/zephyr/pull/23821/commits/989c4713ba429aa5105fe476b4d629718f3e6082	Patch, Third Party Advisory
vulnerabilities@zephyrproject.org	https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment	Third Party Advisory
vulnerabilities@zephyrproject.org	https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-86	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10071	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/zephyrproject-rtos/zephyr/pull/23821/commits/989c4713ba429aa5105fe476b4d629718f3e6082	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-86	Third Party Advisory

Impacted products

	Vendor	Product	Version
	zephyrproject	zephyr	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "zephyr",
          "vendor": "zephyrproject-rtos",
          "versions": [
            {
              "lessThan": "unspecified",
              "status": "affected",
              "version": "2.2.0",
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            }
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    }
  ],
  "configurations": [
    {
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              "versionEndIncluding": "2.2.0",
              "vulnerable": true
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    },
    {
      "lang": "es",
      "value": "El c\u00f3digo de an\u00e1lisis de Zephyr MQTT realiza una comprobaci\u00f3n insuficiente del campo de longitud en los mensajes de publicaci\u00f3n, lo que permite un desbordamiento del b\u00fafer y potencialmente una ejecuci\u00f3n de c\u00f3digo remota. NCC-ZEP-031 Este problema afecta a: zephyrproject-rtos zephyr versi\u00f3n 2.2.0 y versiones posteriores"
    }
  ],
  "id": "CVE-2020-10071",
  "lastModified": "2026-06-17T02:47:17.957",
  "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": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.0,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 6.0,
        "source": "vulnerabilities@zephyrproject.org",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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        "impactScore": 5.9,
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    },
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      ],
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    },
    {
      "source": "vulnerabilities@zephyrproject.org",
      "tags": [
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      "url": "https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment"
    },
    {
      "source": "vulnerabilities@zephyrproject.org",
      "tags": [
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    },
    {
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    },
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      "tags": [
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    }
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  "sourceIdentifier": "vulnerabilities@zephyrproject.org",
  "vulnStatus": "Modified",
  "weaknesses": [
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        {
          "lang": "en",
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      "type": "Secondary"
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      "description": [
        {
          "lang": "en",
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2020-10071 (GCVE-0-2020-10071)

Vulnerability from cvelistv5 – Published: 2020-06-05 17:37 – Updated: 2024-09-17 04:19

Title

Insufficient publish message length validation in MQTT

Summary

Severity

9 (Critical)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE

CWE-120 - Buffer Overflow
CWE-129 - Improper Validation of Array Index

Assigner

zephyr mitre root

References

4 references

URL	Tags
https://research.nccgroup.com/2020/05/26/research…	x_refsource_MISC
https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-86	x_refsource_MISC
https://docs.zephyrproject.org/latest/security/vu…	x_refsource_MISC
https://github.com/zephyrproject-rtos/zephyr/pull…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
zephyrproject-rtos	zephyr	Affected: 2.2.0 , < unspecified (custom)

Date Public

2020-05-25 00:00

Credits

NCC Group for report

Show details on NVD website

JSON

To clipboard

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        ],
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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.