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This vulnerability is due to insufficient validation of client-supplied parameters while establishing an SSL VPN session. An attacker could exploit this vulnerability by crafting a malicious request and sending it to the affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to crash and restart, resulting in the failure of the established SSL VPN connections and forcing remote users to initiate a new VPN connection and re-authenticate. A sustained attack could prevent new SSL VPN connections from being established. Note: When the attack traffic stops, the Cisco AnyConnect VPN server recovers gracefully without requiring manual intervention. Cisco Meraki has released software updates that address this vulnerability."}, {"lang": "es", "value": "Una vulnerabilidad en el servidor VPN Cisco AnyConnect de los dispositivos Cisco Meraki MX y Cisco Meraki Z3 Teleworker Gateway podr\u00eda permitir a un atacante remoto no autenticado causar una condici\u00f3n de denegaci\u00f3n de servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad es debido a que no se comprueban suficientemente los par\u00e1metros proporcionados por el cliente mientras es establecida una sesi\u00f3n VPN SSL. Un atacante podr\u00eda explotar esta vulnerabilidad al dise\u00f1ar una petici\u00f3n maliciosa y envi\u00e1ndola al dispositivo afectado. Un ataque con \u00e9xito podr\u00eda permitir al atacante causar a el servidor VPN Cisco AnyConnect bloquearse y reiniciarse, resultando en el fracaso de las conexiones VPN SSL establecidas y obligar\u00eda a usuarios remotos a iniciar una nueva conexi\u00f3n VPN y volver a autenticarse. Un ataque sostenido podr\u00eda impedir que sean establecidas nuevas conexiones VPN SSL. Nota: Cuando el tr\u00e1fico de ataque es detenido, el servidor VPN Cisco AnyConnect es recuperado con elegancia sin necesidad de intervenci\u00f3n manual. Cisco Meraki ha publicado actualizaciones de software que abordan esta vulnerabilidad"}], "id": "CVE-2022-20933", "lastModified": "2024-11-21T06:43:51.123", "metrics": {"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": "ykramarz@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"}]}, "published": "2022-10-26T15:15:14.713", "references": [{"source": "ykramarz@cisco.com", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-meraki-mx-vpn-dos-vnESbgBf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-meraki-mx-vpn-dos-vnESbgBf"}], "sourceIdentifier": "ykramarz@cisco.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-234"}], "source": "ykramarz@cisco.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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