CVE-2024-20509

published 2024-10-02

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…

Priority P4 31 medium 5.9 CVSS 3.1

AV N AC H PR N UI N S U C N I N A H

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.

Affected

37 ranges · showing 25

Vendor	Product	Version range	Fixed in
cisco	cisco_meraki_mx_firmware	—	—
cisco	cisco_meraki_mx_firmware	—	—
cisco	cisco_meraki_mx_firmware	—	—
cisco	cisco_meraki_mx_firmware	—	—
cisco	cisco_meraki_mx_firmware	—	—
cisco	cisco_meraki_mx_firmware	—	—
cisco	cisco_meraki_mx_firmware	—	—
cisco	cisco_meraki_mx_firmware	—	—
cisco	cisco_meraki_mx_firmware	—	—
cisco	cisco_meraki_mx_firmware	—	—
cisco	cisco_meraki_mx_firmware	—	—
cisco	meraki_mx100_firmware	>= 16.2 < 18.211.2	18.211.2
cisco	meraki_mx105_firmware	>= 16.2 < 18.211.2	18.211.2
cisco	meraki_mx250_firmware	>= 16.2 < 18.211.2	18.211.2
cisco	meraki_mx400_firmware	>= 16.2 < 18.211.2	18.211.2
cisco	meraki_mx450_firmware	>= 16.2 < 18.211.2	18.211.2
cisco	meraki_mx600_firmware	>= 16.2 < 18.211.2	18.211.2
cisco	meraki_mx64_firmware	>= 17.6.0 < 18.211.2	18.211.2
cisco	meraki_mx64w_firmware	>= 16.2 < 18.211.2	18.211.2
cisco	meraki_mx65_firmware	>= 17.6.0 < 18.211.2	18.211.2
cisco	meraki_mx65w_firmware	>= 16.2 < 18.211.2	18.211.2
cisco	meraki_mx67_firmware	>= 16.2 < 18.211.2	18.211.2
cisco	meraki_mx67c_firmware	>= 16.2 < 18.211.2	18.211.2
cisco	meraki_mx67w_firmware	>= 16.2 < 18.211.2	18.211.2
cisco	meraki_mx68_firmware	>= 16.2 < 18.211.2	18.211.2

CVSS provenance

nvd v3.1 5.9 MEDIUM CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

vendor_cisco 5.8 MEDIUM

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CWE-362