CVE-2024-20501: Cisco Meraki MX and Z3 Teleworker Gateway AnyConnect VPN Denial of Service Vulnerability
Multiple vulnerabilities in the Cisco AnyConnect VPN server of Cisco Meraki MX and Cisco Meraki Z Series Teleworker Gateway devices could allow an unauthenticated, remote attacker to cause a DoS condition in the AnyConnect service on an affected device.
These vulnerabilities are due to insufficient validation of client-supplied parameters while establishing an SSL VPN session. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to the VPN server of an affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to restart, resulting in the failure of the established SSL VPN connections and forcing remote users to initiate a new VPN connection and reauthenticate. 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2024-20501?
CVE-2024-20501 has been rated as a high severity vulnerability due to its potential to cause a denial of service (DoS) condition.
How do I fix CVE-2024-20501?
To mitigate CVE-2024-20501, it is recommended to update the Cisco Meraki MX and Z Series Teleworker Gateway devices to the latest firmware version available.
Which Cisco products are affected by CVE-2024-20501?
CVE-2024-20501 affects Cisco Meraki MX and Z Series Teleworker Gateway devices running specific firmware versions from 16.2 to 18.211.2.
What type of attack can CVE-2024-20501 enable?
CVE-2024-20501 allows an unauthenticated, remote attacker to exploit vulnerabilities to trigger a denial of service condition on the AnyConnect service.
Is CVE-2024-20501 exploitable remotely?
Yes, CVE-2024-20501 can be exploited remotely by attackers without authentication.