CVE-2024-20434

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A successful exploit could allow the attacker to render the control plane of the affected device unresponsive. The device would not be accessible through the console or CLI, and it would not respond to ping requests, SNMP requests, or requests from other control plane protocols. Traffic that is traversing the device through the data plane is not affected. A reload of the device is required to restore control plane services."}], "affected": [{"vendor": "Cisco", "product": "Cisco IOS XE Software", "versions": [{"version": "16.6.1", "status": "affected"}, {"version": "16.6.2", "status": "affected"}, {"version": "16.6.3", "status": "affected"}, {"version": "16.6.4", "status": "affected"}, {"version": "16.6.5", "status": "affected"}, {"version": "16.6.4a", "status": "affected"}, {"version": "16.6.6", "status": "affected"}, {"version": "16.6.7", "status": "affected"}, {"version": "16.6.8", "status": "affected"}, {"version": "16.6.9", "status": "affected"}, {"version": "16.6.10", "status": "affected"}, {"version": "16.7.1", "status": "affected"}, {"version": "16.8.1", "status": "affected"}, {"version": "16.8.1a", "status": "affected"}, {"version": "16.8.1s", "status": "affected"}, {"version": "16.9.1", "status": "affected"}, {"version": "16.9.2", "status": "affected"}, {"version": "16.9.1s", "status": "affected"}, {"version": "16.9.3", 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An attacker could exploit this vulnerability by sending crafted frames to an affected device. A successful exploit could allow the attacker to render the control plane of the affected device unresponsive. The device would not be accessible through the console or CLI, and it would not respond to ping requests, SNMP requests, or requests from other control plane protocols. Traffic that is traversing the device through the data plane is not affected. 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An attacker could exploit this vulnerability by sending crafted frames to an affected device. A successful exploit could allow the attacker to render the control plane of the affected device unresponsive. The device would not be accessible through the console or CLI, and it would not respond to ping requests, SNMP requests, or requests from other control plane protocols. Traffic that is traversing the device through the data plane is not affected. A reload of the device is required to restore control plane services."}, {"lang": "es", "value": "Una vulnerabilidad en el software Cisco IOS XE podr\u00eda permitir que un atacante adyacente no autenticado provoque una condici\u00f3n de denegaci\u00f3n de servicio (DoS) en el plano de control de un dispositivo afectado. Esta vulnerabilidad se debe a un manejo inadecuado de tramas con informaci\u00f3n de etiqueta VLAN. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando tramas manipuladas a un dispositivo afectado. Una explotaci\u00f3n exitosa podr\u00eda permitir al atacante dejar inoperante el plano de control del dispositivo afectado. El dispositivo no ser\u00eda accesible a trav\u00e9s de la consola o la CLI, y no responder\u00eda a las solicitudes de ping, solicitudes SNMP o solicitudes de otros protocolos del plano de control. El tr\u00e1fico que atraviesa el dispositivo a trav\u00e9s del plano de datos no se ve afectado. Se requiere una recarga del dispositivo para restaurar los servicios del plano de control."}], "id": "CVE-2024-20434", "lastModified": "2026-06-17T07:07:05.213", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "psirt@cisco.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-20434", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-25T17:58:41.111852Z", "version": "2.0.3"}}]}, "published": "2024-09-25T17:15:16.090", "references": [{"source": "psirt@cisco.com", "tags": ["Vendor Advisory"], "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vlan-dos-27Pur5RT"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "psirt@cisco.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-190"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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