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CVE-2021-25437

Estado: ModificadaCrítica (9.8)—

Improper access control vulnerability in Tizen FOTA service prior to Firmware update JUL-2021 Release allows attackers to arbitrary code execution by replacing FOTA update file.

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)

Linux — Tizen

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-25437",
  "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": "mobile.security@samsung.com",
      "affectedData": [
        {
          "vendor": "Samsung Mobile",
          "product": "Tizen wearable devices",
          "versions": [
            {
              "status": "affected",
              "version": "Tizen 5.5",
              "lessThan": "Firmware update JUL-2021 Release",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-07-08T14:15:08.857",
  "references": [
    {
      "url": "https://security.samsungmobile.com/serviceWeb.smsb?year=2021&month=7",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "mobile.security@samsung.com"
    },
    {
      "url": "https://security.samsungmobile.com/serviceWeb.smsb?year=2021&month=7",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "mobile.security@samsung.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper access control vulnerability in Tizen FOTA service prior to Firmware update JUL-2021 Release allows attackers to arbitrary code execution by replacing FOTA update file."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de control de acceso inapropiado en el servicio FOTA de Tizen anterior a la actualización de firmware JUL-2021 Release, permite a atacantes una ejecución de código arbitrario al reemplazar del archivo de actualización FOTA"
    }
  ],
  "lastModified": "2026-06-17T03:42:04.993",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:tizen:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B8A186D7-A9F7-4D4B-9D4F-F3C239695EE9",
              "versionEndExcluding": "5.5"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "mobile.security@samsung.com"
}