CVE-2021-1586

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This vulnerability exists because TCP traffic sent to a specific port on an affected device is not properly sanitized. An attacker could exploit this vulnerability by sending crafted TCP data to a specific port that is listening on a public-facing IP address for the Multi-Pod or Multi-Site configuration. A successful exploit could allow the attacker to cause the device to restart unexpectedly, resulting in a DoS condition."}, {"lang": "es", "value": "Una vulnerabilidad en las configuraciones de red Multi-Pod o Multi-Site para Cisco Nexus 9000 Series Fabric Switches en el modo Application Centric Infrastructure (ACI) podr\u00eda permitir a un atacante remoto no autenticado reiniciar inesperadamente el dispositivo, resultando en una condici\u00f3n de denegaci\u00f3n de servicio (DoS). Esta vulnerabilidad se presenta porque el tr\u00e1fico TCP enviado a un puerto espec\u00edfico en un dispositivo afectado no se sanea apropiadamente. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de datos TCP dise\u00f1ados a un puerto espec\u00edfico que est\u00e1 escuchando en una direcci\u00f3n IP p\u00fablica para la configuraci\u00f3n de Multi-Pod o Multi-Site. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante causar que el dispositivo se reinicie inesperadamente, resultando en una condici\u00f3n de DoS."}], "id": "CVE-2021-1586", "lastModified": "2026-06-17T03:32:06.740", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "psirt@cisco.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-1586", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-11-07T21:54:28.309256Z", "version": "2.0.3"}}]}, "published": "2021-08-25T20:15:11.237", "references": [{"source": "psirt@cisco.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9kaci-tcp-dos-YXukt6gM"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9kaci-tcp-dos-YXukt6gM"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-345"}], "source": "psirt@cisco.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-345"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

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