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CVE-2019-17211

Estado: ModificadaCrítica (9.8)—

Se descubrió un desbordamiento de enteros en la biblioteca CoAP en Arm Mbed OS versión 5.14.0. La función sn_coap_builder_calc_needed_packet_data_size_2() es usada para calcular la memoria requerida para el mensaje de CoAP de la estructura de datos de sn_coap_hdr_s. Tanto return_byte_count como src_coap_msg_ptr-)payload_len son del tipo uint16_t. Cuando son agregados juntos, el resultado return_byte_count puede ajustarse al valor máximo de uint16_t. Como un resultado, el espacio de búfer insuficiente es asignado para el mensaje de CoAP correspondiente.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Mbed — Mbed

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2019-17211",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 10,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2019-11-05T16:15:10.570",
  "references": [
    {
      "url": "https://github.com/ARMmbed/mbed-os/blob/d0686fd30b4d3d02efdc7e4d0fbf0dfe173543b6/features/frameworks/mbed-coap/source/sn_coap_builder.c#L1090",
      "tags": [
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    },
    {
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      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/ARMmbed/mbed-os/blob/d0686fd30b4d3d02efdc7e4d0fbf0dfe173543b6/features/frameworks/mbed-coap/source/sn_coap_builder.c#L524",
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/ARMmbed/mbed-os/issues/11804",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An integer overflow was discovered in the CoAP library in Arm Mbed OS 5.14.0. The function sn_coap_builder_calc_needed_packet_data_size_2() is used to calculate the required memory for the CoAP message from the sn_coap_hdr_s data structure. Both returned_byte_count and src_coap_msg_ptr->payload_len are of type uint16_t. When added together, the result returned_byte_count can wrap around the maximum uint16_t value. As a result, insufficient buffer space is allocated for the corresponding CoAP message."
    },
    {
      "lang": "es",
      "value": "Se descubrió un desbordamiento de enteros en la biblioteca CoAP en Arm Mbed OS versión 5.14.0. La función sn_coap_builder_calc_needed_packet_data_size_2() es usada para calcular la memoria requerida para el mensaje de CoAP de la estructura de datos de sn_coap_hdr_s. Tanto return_byte_count como src_coap_msg_ptr-)payload_len son del tipo uint16_t. Cuando son agregados juntos, el resultado return_byte_count puede ajustarse al valor máximo de uint16_t. Como un resultado, el espacio de búfer insuficiente es asignado para el mensaje de CoAP correspondiente."
    }
  ],
  "lastModified": "2026-06-17T02:23:28.677",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:mbed:mbed:5.13.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "06B7390D-99AA-4F05-AFE7-965AFBD5B8BF"
            },
            {
              "criteria": "cpe:2.3:o:mbed:mbed:5.14.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "900BC83E-3EE9-4DE7-9187-34530D0AFEC4"
            }
          ],
          "operator": "OR"
        }
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  ],
  "sourceIdentifier": "cve@mitre.org"
}