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CVE-2020-27484

Estado: ModificadaCrítica (9.9)—

Garmin Forerunner 235 before 8.20 is affected by: Integer Overflow. The component is: ConnectIQ TVM. The attack vector is: To exploit the vulnerability, the attacker must upload a malicious ConnectIQ application to the ConnectIQ store. The ConnectIQ program interpreter fails to check for overflow when allocating the array for the NEWA instruction. This a constrained read/write primitive across the entire MAX32630 address space. A successful exploit would allow a ConnectIQ app store application to escape and perform activities outside the restricted application execution environment.

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)

Garmin — Forerunner 235 Firmware

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2020-27484",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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          "baseScore": 6.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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          "confidentialityImpact": "HIGH"
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        "impactScore": 6,
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  "affected": [
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      "affectedData": [
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  "published": "2020-11-16T21:15:13.377",
  "references": [
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      "url": "https://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0004.md",
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        "Third Party Advisory"
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  "vulnStatus": "Modified",
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      "description": [
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          "value": "CWE-190"
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      "value": "Garmin Forerunner 235 before 8.20 is affected by: Integer Overflow. The component is: ConnectIQ TVM. The attack vector is: To exploit the vulnerability, the attacker must upload a malicious ConnectIQ application to the ConnectIQ store. The ConnectIQ program interpreter fails to check for overflow when allocating the array for the NEWA instruction. This a constrained read/write primitive across the entire MAX32630 address space. A successful exploit would allow a ConnectIQ app store application to escape and perform activities outside the restricted application execution environment."
    },
    {
      "lang": "es",
      "value": "Garmin Forerunner 235 versiones anteriores a 8.20, está afectado por: un Desbordamiento de Enteros. El componente es: ConnectIQ TVM. El vector de ataque es: Para explotar la vulnerabilidad, el atacante debe cargar una aplicación de ConnectIQ maliciosa en la tienda ConnectIQ. El intérprete del programa ConnectIQ presenta un fallo al comprobar el desbordamiento al asignar la matriz para la instrucción NEWA. Esta es una primitiva de lectura y escritura restringida en todo el espacio de direcciones MAX32630. Una explotación con éxito permitiría a una aplicación de la tienda de aplicaciones ConnectIQ escapar y llevar a cabo actividades fuera del entorno de ejecución de aplicaciones restringido"
    }
  ],
  "lastModified": "2026-06-17T03:09:15.183",
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