{"affected":[{"affectedData":[{"product":"Samsung","vendor":"Samsung","versions":[{"status":"affected","version":"Samsung SmartThings Hub STH-ETH-250 - Firmware version 0.20.17"}]}],"source":"talos-cna@cisco.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:samsung:sth-eth-250_firmware:0.20.17:*:*:*:*:*:*:*","matchCriteriaId":"69ED63CA-72C3-4337-B1ED-1696DB316B0F","vulnerable":true}],"negate":false,"operator":"OR"},{"cpeMatch":[{"criteria":"cpe:2.3:h:samsung:sth-eth-250:-:*:*:*:*:*:*:*","matchCriteriaId":"4B42493E-7140-4A19-B94A-2F6262D0BCDA","vulnerable":false}],"negate":false,"operator":"OR"}],"operator":"AND"}],"cveTags":[],"descriptions":[{"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."}],"id":"CVE-2018-3866","lastModified":"2026-06-17T01:57:55.697","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"HIGH","cvssData":{"accessComplexity":"LOW","accessVector":"NETWORK","authentication":"SINGLE","availabilityImpact":"COMPLETE","baseScore":9.0,"confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","vectorString":"AV:N/AC:L/Au:S/C:C/I:C/A:C","version":"2.0"},"exploitabilityScore":8.0,"impactScore":10.0,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV30":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.9,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.0"},"exploitabilityScore":3.1,"impactScore":6.0,"source":"talos-cna@cisco.com","type":"Secondary"}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.9,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"exploitabilityScore":3.1,"impactScore":6.0,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2018-08-23T22:29:00.370","references":[{"source":"talos-cna@cisco.com","tags":["Exploit","Third Party Advisory"],"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2018-0548"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Third Party Advisory"],"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2018-0548"}],"sourceIdentifier":"talos-cna@cisco.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-787"}],"source":"nvd@nist.gov","type":"Primary"}]}