{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-42143", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2024-08-04T03:30:37.578Z", "dateReserved": "2021-10-11T00:00:00", "datePublished": "2024-01-24T00:00:00"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2024-01-24T17:53:40.614549"}, "descriptions": [{"lang": "en", "value": "An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. An infinite loop bug exists during the handling of a ClientHello handshake message. This bug allows remote attackers to cause a denial of service by sending a malformed ClientHello handshake message with an odd length of cipher suites, which triggers an infinite loop (consuming all resources) and a buffer over-read that can disclose sensitive information."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://seclists.org/fulldisclosure/2024/Jan/16"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://seclists.org/fulldisclosure/2024/Jan/16"}, {"url": "https://seclists.org/fulldisclosure/2024/Jan/16", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T03:30:37.578Z"}}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:contiki-ng:tinydtls:*:*:*:*:*:*:*:*", "matchCriteriaId": "E938DF84-2663-4516-87E3-B7E46789F6A1", "versionEndIncluding": "2018-08-30", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. An infinite loop bug exists during the handling of a ClientHello handshake message. This bug allows remote attackers to cause a denial of service by sending a malformed ClientHello handshake message with an odd length of cipher suites, which triggers an infinite loop (consuming all resources) and a buffer over-read that can disclose sensitive information."}, {"lang": "es", "value": "Se descubri\u00f3 un problema en Contiki-NG tinyDTLS a trav\u00e9s de la rama maestra 53a0d97. Existe un error de bucle infinito durante el manejo de un mensaje de protocolo de enlace ClientHello. Este error permite a atacantes remotos provocar una denegaci\u00f3n de servicio enviando un mensaje de protocolo de enlace ClientHello mal formado con una longitud impar de conjuntos de cifrado, lo que desencadena un bucle infinito (consumiendo todos los recursos) y una sobrelectura del b\u00fafer que puede revelar informaci\u00f3n confidencial."}], "id": "CVE-2021-42143", "lastModified": "2024-11-21T06:27:21.117", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-01-24T18:15:08.080", "references": [{"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://seclists.org/fulldisclosure/2024/Jan/16"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://seclists.org/fulldisclosure/2024/Jan/16"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://seclists.org/fulldisclosure/2024/Jan/16"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-835"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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