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CVE-2018-3866

Estado: ModificadaCrítica (9.9)—

An exploitable buffer overflow vulnerability exists in the samsungWifiScan handler of video-core's HTTP server of Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17. The video-core process incorrectly extracts fields from a user-controlled JSON payload, leading to a buffer overflow on the stack. The strcpy at [8] overflows the destination buffer, which has a size of 40 bytes. An attacker can send an arbitrarily long 'callbackUrl' value in order to exploit this vulnerability.

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)

Samsung — Sth-eth-250 Firmware

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-3866",
  "cveTags": [],
  "metrics": {
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          "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
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  "published": "2018-08-23T22:29:00.370",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-787"
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      "lang": "en",
      "value": "An exploitable buffer overflow vulnerability exists in the samsungWifiScan handler of video-core's HTTP server of Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17. The video-core process incorrectly extracts fields from a user-controlled JSON payload, leading to a buffer overflow on the stack. The strcpy at [8] overflows the destination buffer, which has a size of 40 bytes. An attacker can send an arbitrarily long 'callbackUrl' value in order to exploit this vulnerability."
    },
    {
      "lang": "es",
      "value": "Existe un desbordamiento de búfer explotable en el manipulador samsungWifiScan del servidor HTTP de video-core de Samsung SmartThings Hub STH-ETH-250 en su versión de firmware 0.20.17. El proceso video-core extrae incorrectamente campos de una carga útil JSON controlada por el usuario, conduciendo a un desbordamiento de búfer en la pila. El strcpy de [8] desborda el búfer de destino, el cual tiene un tamaño de 40 bytes. Un atacante puede enviar un valor \"callbackUrl\" arbitrariamente largo para explotar esta vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T01:57:55.697",
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