CVE-2021-1523

{"id": "CVE-2021-1523", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "ykramarz@cisco.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 3.9}]}, "published": "2021-08-25T19:15:07.217", "references": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9kaci-queue-wedge-cLDDEfKF", "tags": ["Vendor Advisory"], "source": "ykramarz@cisco.com"}, {"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9kaci-queue-wedge-cLDDEfKF", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "ykramarz@cisco.com", "description": [{"lang": "en", "value": "CWE-772"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-772"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) Mode could allow an unauthenticated, remote attacker to cause a queue wedge on a leaf switch, which could result in critical control plane traffic to the device being dropped. This could result in one or more leaf switches being removed from the fabric. This vulnerability is due to mishandling of ingress TCP traffic to a specific port. An attacker could exploit this vulnerability by sending a stream of TCP packets to a specific port on a Switched Virtual Interface (SVI) configured on the device. A successful exploit could allow the attacker to cause a specific packet queue to queue network buffers but never process them, leading to an eventual queue wedge. This could cause control plane traffic to be dropped, resulting in a denial of service (DoS) condition where the leaf switches are unavailable. Note: This vulnerability requires a manual intervention to power-cycle the device to recover."}, {"lang": "es", "value": "Una vulnerabilidad en Cisco Nexus 9000 Series Fabric Switches en el Modo Application Centric Infrastructure (ACI), podr\u00eda permitir a un atacante remoto no autenticado causar un acu\u00f1amiento de queues en un switch de hoja, que podr\u00eda resultar en una ca\u00edda del tr\u00e1fico cr\u00edtico del plano de control en el dispositivo. Esto podr\u00eda dar lugar a que uno o m\u00e1s switches de hoja sean eliminados de la estructura. Esta vulnerabilidad es debido a un manejo inapropiado del tr\u00e1fico TCP de entrada a un puerto espec\u00edfico. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de un flujo de paquetes TCP a un puerto espec\u00edfico en una Switched Virtual Interface configurada en el dispositivo. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante causar que una queue de paquetes espec\u00edfica ponga en queue los b\u00faferes de red pero nunca los procese, conllevando a un eventual acu\u00f1amiento de queues. Esto podr\u00eda causar que el tr\u00e1fico del plano de control se caiga, resultando en una condici\u00f3n de denegaci\u00f3n de servicio (DoS) donde los switches de la hoja no est\u00e1n disponibles. Nota: Esta vulnerabilidad requiere una intervenci\u00f3n manual para apagar el dispositivo y recuperarlo."}], "lastModified": "2024-11-21T05:44:32.577", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:cisco:nx-os:13.2\\(3n\\):*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CEBC0A74-551B-4BD1-A59A-80C119362D60"}, {"criteria": "cpe:2.3:o:cisco:nx-os:14.2\\(4i\\):*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9563DBDC-D2C0-4C7C-A246-EC95DC4581CA"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:cisco:nexus_93120tx:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "07DE6F63-2C7D-415B-8C34-01EC05C062F3"}, {"criteria": "cpe:2.3:h:cisco:nexus_93128tx:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "F423E45D-A6DD-4305-9C6A-EAB26293E53A"}, {"criteria": "cpe:2.3:h:cisco:nexus_9332pq:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "113772B6-E9D2-4094-9468-3F4E1A87D07D"}, {"criteria": "cpe:2.3:h:cisco:nexus_9372px:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "4364ADB9-8162-451D-806A-B98924E6B2CF"}, {"criteria": "cpe:2.3:h:cisco:nexus_9372px-e:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "B53BCB42-ED61-4FCF-8068-CB467631C63C"}, {"criteria": "cpe:2.3:h:cisco:nexus_9372tx:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "49E0371B-FDE2-473C-AA59-47E1269D050F"}, {"criteria": "cpe:2.3:h:cisco:nexus_9372tx-e:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "489D11EC-5A18-4F32-BC7C-AC1FCEC27222"}, {"criteria": "cpe:2.3:h:cisco:nexus_9396px:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "1BC5293E-F2B4-46DC-85DA-167EA323FCFD"}, {"criteria": "cpe:2.3:h:cisco:nexus_9396tx:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "EA022E77-6557-4A33-9A3A-D028E2DB669A"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "ykramarz@cisco.com"}