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This can lead to a build-up of VSH processes that overtime can deplete system memory. When there is no system memory available, this can cause unexpected system behaviors and crashes. The vulnerability is due to the VSH process not being properly deleted when a remote management connection to the device is disconnected. An attacker could exploit this vulnerability by repeatedly performing a remote management connection to the device and terminating the connection in an unexpected manner. A successful exploit could allow the attacker to cause the VSH processes to fail to delete, which can lead to a system-wide denial of service (DoS) condition. The attacker must have valid user credentials to log in to the device using the remote management connection."}, {"lang": "es", "value": "Una vulnerabilidad en la administraci\u00f3n de sesi\u00f3n de Virtual Shell (VSH) para el software Cisco NX-OS podr\u00eda permitir que un atacante remoto autenticado haga que un proceso VSH no se elimine al finalizar. Esto puede conducir a una acumulaci\u00f3n de procesos VSH que las horas extras pueden agotar la memoria del sistema. Cuando no hay memoria del sistema disponible, esto puede causar comportamientos inesperados del sistema y fallos. La vulnerabilidad se debe a que el proceso VSH no se elimina correctamente cuando se desconecta una conexi\u00f3n de administraci\u00f3n remota al dispositivo. Un atacante podr\u00eda aprovechar esta vulnerabilidad al realizar repetidamente una conexi\u00f3n de administraci\u00f3n remota al dispositivo y terminar la conexi\u00f3n de manera inesperada. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante hacer que los procesos VSH no se eliminen, lo que puede conducir a una condici\u00f3n de denegaci\u00f3n de servicio (DoS) en todo el sistema. El atacante debe tener credenciales de usuario v\u00e1lidas para iniciar sesi\u00f3n en el dispositivo utilizando la conexi\u00f3n de administraci\u00f3n remota."}], "id": "CVE-2019-1965", "lastModified": "2024-11-21T04:37:47.067", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 3.1, "impactScore": 4.0, "source": "ykramarz@cisco.com", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 4.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-08-28T19:15:11.053", "references": [{"source": "ykramarz@cisco.com", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-memleak-dos"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-memleak-dos"}], "sourceIdentifier": "ykramarz@cisco.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "ykramarz@cisco.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-772"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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