{"id": "CVE-2021-31251", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "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}]}, "published": "2021-06-04T21:15:07.517", "references": [{"url": "https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31251", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLqK1KhKguU", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.chiyu-tech.com/msg/message-Firmware-update-87.html", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://gitbook.seguranca-informatica.pt/cve-and-exploits/cves/chiyu-iot-devices#cve-2021-31251", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://seguranca-informatica.pt/dancing-in-the-iot-chiyu-devices-vulnerable-to-remote-attacks/#.YLqK1KhKguU", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.chiyu-tech.com/msg/message-Firmware-update-87.html", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-287"}]}], "descriptions": [{"lang": "en", "value": "An authentication bypass in telnet server in BF-430 and BF431 232/422 TCP/IP Converter, BF-450M and SEMAC from CHIYU Technology Inc allows obtaining a privileged connection with the target device by supplying a specially malformed request and an attacker may force the remote telnet server to believe that the user has already authenticated."}, {"lang": "es", "value": "Una omisi\u00f3n de autenticaci\u00f3n en el servidor telnet de los convertidores TCP/IP BF-430 y BF431 232/422, BF-450M y SEMAC de CHIYU Technology Inc,. permite obtener una conexi\u00f3n privilegiada con el dispositivo de destino al suministrar una petici\u00f3n especialmente malformada y un atacante puede forzar al servidor telnet remoto a creer que el usuario ya se ha autenticado"}], "lastModified": "2024-11-21T06:05:22.107", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:chiyu-tech:bf-430_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA0C36F7-25D5-4A51-B312-C924362A8A29"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:chiyu-tech:bf-430:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "E4E3D910-0317-4B0B-BB33-15B86AB3E4EB"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:chiyu-tech:bf-431_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C137757C-105F-400D-93F3-4620975011B2"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:chiyu-tech:bf-431:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "23BF3F3D-7752-492B-87E9-949AFA19F85A"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:chiyu-tech:bf-450m_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B5039F6C-F563-4944-A977-0D79BC6E2B17"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:chiyu-tech:bf-450m:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "CD504C8D-7E80-48EF-B3F6-93FC6AEE031E"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:chiyu-tech:semac_s2_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E605EBAB-D5F9-43A8-8096-DA62A4295A92"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:chiyu-tech:semac_s2:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "BDAC8B2A-8AB4-4EAB-84D5-526F89C8D9B6"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:chiyu-tech:semac_d1_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A4B14981-FCEA-45FC-896F-7677BEB7A8FB"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:chiyu-tech:semac_d1:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "59C613EE-4884-4CD6-B4BA-AF41FD26DB35"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:chiyu-tech:semac_d2_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "10BBB47A-E6EF-4EE5-A74C-F7766004880B"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:chiyu-tech:semac_d2:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "7123F403-1044-4ECC-A6F8-AB8E0173432B"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:chiyu-tech:semac_d4_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D6A0946C-6A4F-4A9E-9D7C-702A74236C89"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:chiyu-tech:semac_d4:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "0F4E3539-D33A-48E1-8B09-4D010BEAC9C1"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:chiyu-tech:semac_s3v3_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DF097E2D-8F46-4EE0-9C0E-449EDC5FE373"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:chiyu-tech:semac_s3v3:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "231A210D-7A72-4E54-BF7D-2594F2735D68"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:chiyu-tech:semac_d2_n300_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "52481D14-6CDD-4D28-ACEB-83EC3FAC7F4D"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:chiyu-tech:semac_d2_n300:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "24D35D62-9633-410F-9D2D-FD61CD5A820B"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:chiyu-tech:semac_s1_osdp_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B982FDE3-0F08-46F8-8A50-BB5650AA5076"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:chiyu-tech:semac_s1_osdp:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "965D6B8E-A7E7-40B3-A4C3-4942E61491A5"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "cve@mitre.org"}
