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An attacker could exploit this vulnerability by sending a series of crafted TLS/SSL messages to the VPN server of an affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to stop accepting new connections, preventing new SSL VPN connections from being established. Existing SSL VPN sessions are not impacted.\r\nNote: When the attack traffic stops, the Cisco AnyConnect VPN server recovers gracefully without requiring manual intervention."}, {"lang": "es", "value": "Una vulnerabilidad en el servidor VPN de Cisco AnyConnect de los dispositivos Cisco Meraki MX y Cisco Meraki Z Series Teleworker Gateway podr\u00eda permitir que un atacante remoto no autenticado provoque una condici\u00f3n de denegaci\u00f3n de servicio (DoS) en el servicio AnyConnect de un dispositivo afectado. Esta vulnerabilidad se debe a una gesti\u00f3n insuficiente de los recursos al establecer sesiones TLS/SSL. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando una serie de mensajes TLS/SSL manipulados al servidor VPN de un dispositivo afectado. Una explotaci\u00f3n exitosa podr\u00eda permitir al atacante hacer que el servidor VPN de Cisco AnyConnect deje de aceptar nuevas conexiones, lo que impedir\u00eda que se establecieran nuevas conexiones VPN SSL. Las sesiones VPN SSL existentes no se ven afectadas. Nota: Cuando el tr\u00e1fico del ataque se detiene, el servidor VPN de Cisco AnyConnect se recupera sin problemas sin necesidad de intervenci\u00f3n manual."}], "id": "CVE-2024-20500", "lastModified": "2024-10-08T18:27:19.347", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "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:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "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": "2024-10-02T19:15:14.350", "references": [{"source": "ykramarz@cisco.com", "tags": ["Vendor Advisory"], "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-meraki-mx-vpn-dos-QTRHzG2"}], "sourceIdentifier": "ykramarz@cisco.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-400"}], "source": "ykramarz@cisco.com", "type": "Secondary"}]}

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