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This vulnerability is due to improper error handling when an IPv6-configured interface receives a specific type of ICMPv6 packet. An attacker could exploit this vulnerability by sending a sustained rate of crafted ICMPv6 packets to a local IPv6 address on a targeted device. A successful exploit could allow the attacker to cause a system memory leak in the ICMPv6 process on the device. As a result, the ICMPv6 process could run out of system memory and stop processing traffic. The device could then drop all ICMPv6 packets, causing traffic instability on the device. Restoring device functionality would require a device reboot."}, {"lang": "es", "value": "Una vulnerabilidad en el procesamiento de ICMP versi\u00f3n 6 (ICMPv6) en el software Cisco NX-OS podr\u00eda permitir a un atacante remoto no autenticado causar una p\u00e9rdida lenta de memoria del sistema, que con el tiempo podr\u00eda conllevar a una condici\u00f3n de denegaci\u00f3n de servicio (DoS). Esta vulnerabilidad es debido a un manejo inapropiado de errores cuando una interfaz configurada con IPv6 recibe un tipo espec\u00edfico de paquete ICMPv6. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de una tasa sostenida de paquetes ICMPv6 dise\u00f1ados a una direcci\u00f3n IPv6 local en un dispositivo de destino. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante causar una p\u00e9rdida de memoria del sistema en el proceso ICMPv6 del dispositivo. Como resultado, el proceso ICMPv6 podr\u00eda quedarse sin memoria del sistema y dejar de procesar el tr\u00e1fico. El dispositivo podr\u00eda eliminar todos los paquetes ICMPv6, lo que provocar\u00eda inestabilidad del tr\u00e1fico en el dispositivo. Restaurar la funcionalidad del dispositivo requerir\u00eda un reinicio del dispositivo"}], "id": "CVE-2021-1229", "lastModified": "2023-11-07T03:27:45.160", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.8, "baseSeverity": "MEDIUM", "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:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "ykramarz@cisco.com", "type": "Secondary"}]}, "published": "2021-02-24T20:15:12.707", "references": [{"source": "ykramarz@cisco.com", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fxos-nxos-icmpv6-dos-YD55jVCq"}], "sourceIdentifier": "ykramarz@cisco.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "ykramarz@cisco.com", "type": "Primary"}]}

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