fkie_cve-2018-19417
Vulnerability from fkie_nvd
Published
2018-11-21 20:29
Modified
2024-11-21 03:57
Severity ?
10.0 (Critical) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Summary
An issue was discovered in the MQTT server in Contiki-NG before 4.2. The function parse_publish_vhdr() that parses MQTT PUBLISH messages with a variable length header uses memcpy to input data into a fixed size buffer. The allocated buffer can fit only MQTT_MAX_TOPIC_LENGTH (default 64) bytes, and a length check is missing. This could lead to Remote Code Execution via a stack-smashing attack (overwriting the function return address). Contiki-NG does not separate the MQTT server from other servers and the OS modules, so access to all memory regions is possible.
References
cve@mitre.orghttps://github.com/contiki-ng/contiki-ng/issues/600Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/contiki-ng/contiki-ng/issues/600Exploit, Third Party Advisory
Impacted products
Vendor Product Version
contiki-ng contiki-ng *


To clipboard 

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    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:contiki-ng:contiki-ng:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "19FF5310-545E-48F8-880F-E20E885BEF85",
              "versionEndExcluding": "4.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in the MQTT server in Contiki-NG before 4.2. The function parse_publish_vhdr() that parses MQTT PUBLISH messages with a variable length header uses memcpy to input data into a fixed size buffer. The allocated buffer can fit only MQTT_MAX_TOPIC_LENGTH (default 64) bytes, and a length check is missing. This could lead to Remote Code Execution via a stack-smashing attack (overwriting the function return address). Contiki-NG does not separate the MQTT server from other servers and the OS modules, so access to all memory regions is possible."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto un problema en el servidor MQTT en Contiki-NG, en versiones anteriores a la 4.2. La funci\u00f3n parse_publish_vhdr() que analiza los mensajes MQTT PUBLISH con una cabecera length variable emplea memcpy para introducir datos en un tama\u00f1o de b\u00fafer fijo. El b\u00fafer asignado solo puede ajustarse a MQTT_MAX_TOPIC_LENGTH (64 bytes por defecto) y carece de una comprobaci\u00f3n de longitud. Esto podr\u00eda conducir a la ejecuci\u00f3n remota de c\u00f3digo mediante un ataque de \"stack-smashing\" (que sobrescribe la direcci\u00f3n de retorno de la funci\u00f3n). Contiki-NG no separa el servidor MQTT de otros servidores y los m\u00f3dulos del sistema operativo, por lo que se puede acceder a todas las regiones de memoria."
    }
  ],
  "id": "CVE-2018-19417",
  "lastModified": "2024-11-21T03:57:53.160",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 10.0,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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    "cvssMetricV30": [
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          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 10.0,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.0"
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        "exploitabilityScore": 3.9,
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        "source": "nvd@nist.gov",
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  },
  "published": "2018-11-21T20:29:00.307",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/contiki-ng/contiki-ng/issues/600"
    },
    {
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      "tags": [
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    }
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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