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MEDIUM · 5.8

CVE-2024-20509

A vulnerability 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 hijack an AnyConnect VPN s...

Vulnerability Description

A vulnerability 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 hijack an AnyConnect VPN session or cause a denial of service (DoS) condition for individual users of the AnyConnect VPN service on an affected device. This vulnerability is due to weak entropy for handlers that are used during the VPN authentication process as well as a race condition that exists in the same process. 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.

CVSS Score

5.8

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW

Affected Products

VendorProductVersions
CiscoMeraki Mx65 Firmware>= 17.6.0, < 18.211.2
CiscoMeraki Mx65-
CiscoMeraki Mx64 Firmware>= 17.6.0, < 18.211.2
CiscoMeraki Mx64-
CiscoMeraki Z4C Firmware>= 16.2, < 18.211.2
CiscoMeraki Z4C-
CiscoMeraki Z4 Firmware>= 16.2, < 18.211.2
CiscoMeraki Z4-
CiscoMeraki Z3C Firmware>= 16.2, < 18.211.2
CiscoMeraki Z3C-
CiscoMeraki Z3 Firmware>= 16.2, < 18.211.2
CiscoMeraki Z3-
CiscoMeraki Vmx Firmware>= 16.2, < 18.211.2
CiscoMeraki Vmx-
CiscoMeraki Mx600 Firmware>= 16.2, < 18.211.2
CiscoMeraki Mx600-
CiscoMeraki Mx450 Firmware>= 16.2, < 18.211.2
CiscoMeraki Mx450-
CiscoMeraki Mx400 Firmware>= 16.2, < 18.211.2
CiscoMeraki Mx400-

Related Weaknesses (CWE)

CWE-362

References

FAQ

What is CVE-2024-20509?

CVE-2024-20509 is a vulnerability with a CVSS score of 5.8 (MEDIUM). A vulnerability 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 hijack an AnyConnect VPN s...

How severe is CVE-2024-20509?

CVE-2024-20509 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2024-20509?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Meraki Mx65 Firmware, Cisco Meraki Mx65, Cisco Meraki Mx64 Firmware, Cisco Meraki Mx64, Cisco Meraki Z4C Firmware.