CVE-2024-20509

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An attacker could exploit this vulnerability by correctly guessing an authentication handler and then sending crafted HTTPS requests to an affected device. A successful exploit could allow the attacker to take over the AnyConnect VPN session from a target user or prevent the target user from establishing an AnyConnect VPN session with the affected device."}, {"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 secuestre una sesi\u00f3n VPN de AnyConnect o provoque una condici\u00f3n de denegaci\u00f3n de servicio (DoS) para usuarios individuales del servicio VPN de AnyConnect en un dispositivo afectado. Esta vulnerabilidad se debe a una entrop\u00eda d\u00e9bil para los controladores que se utilizan durante el proceso de autenticaci\u00f3n de VPN, as\u00ed como a una condici\u00f3n de ejecuci\u00f3n que existe en el mismo proceso. Un atacante podr\u00eda aprovechar esta vulnerabilidad adivinando correctamente un controlador de autenticaci\u00f3n y luego enviando solicitudes HTTPS manipuladas a un dispositivo afectado. Una explotaci\u00f3n exitosa podr\u00eda permitir al atacante tomar el control de la sesi\u00f3n VPN de AnyConnect de un usuario objetivo o evitar que el usuario objetivo establezca una sesi\u00f3n VPN de AnyConnect con el dispositivo afectado."}], "id": "CVE-2024-20509", "lastModified": "2026-06-17T07:07:27.780", "metrics": {"cvssMetricV31": [{"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": "psirt@cisco.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-20509", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-02T19:50:56.321761Z", "version": "2.0.3"}}]}, "published": "2024-10-02T19:15:14.997", "references": [{"source": "psirt@cisco.com", "tags": ["Vendor Advisory"], "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-meraki-mx-vpn-dos-by-QWUkqV7X"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "psirt@cisco.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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