CVE-2021-20156

{"id": "CVE-2021-20156", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 4.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "published": "2021-12-30T22:15:08.893", "references": [{"url": "https://www.tenable.com/security/research/tra-2021-54", "tags": ["Third Party Advisory"], "source": "vulnreport@tenable.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-347"}]}], "descriptions": [{"lang": "en", "value": "Trendnet AC2600 TEW-827DRU version 2.08B01 contains an improper access control configuration that could allow for a malicious firmware update. It is possible to manually install firmware that may be malicious in nature as there does not appear to be any signature validation done to determine if it is from a known and trusted source. This includes firmware updates that are done via the automated \"check for updates\" in the admin interface. If an attacker is able to masquerade as the update server, the device will not verify that the firmware updates downloaded are legitimate."}, {"lang": "es", "value": "Trendnet AC2600 TEW-827DRU versi\u00f3n 2.08B01, contiene una configuraci\u00f3n de control de acceso inapropiada que podr\u00eda permitir una actualizaci\u00f3n de firmware maliciosa. Es posible instalar manualmente firmware que puede ser de naturaleza maliciosa, ya que no parece haber ninguna comprobaci\u00f3n de firma realizada para determinar si es de una fuente conocida y confiable. Esto incluye las actualizaciones de firmware que se realizan por medio de la \"check for updates\" automatizada en la interfaz de administraci\u00f3n. Si un atacante es capaz de hacerse pasar por el servidor de actualizaciones, el dispositivo no verificar\u00e1 que las actualizaciones de firmware descargadas son leg\u00edtimas.\n"}], "lastModified": "2022-01-07T17:33:54.700", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:trendnet:tew-827dru_firmware:2.08b01:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9C008C1E-18D3-4A0C-97A1-89009310C55B"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:trendnet:tew-827dru:2.0:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "FA6A79A7-46A7-446F-B512-4C75B5C214CE"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "vulnreport@tenable.com"}