CVE-2024-20509

Medium

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.

SeverityMedium

CVSS5.8

Exploit probability—

Product

Cisco Meraki Mx65 Firmware

PublishedOct 2, 2024

First seenOct 2, 2024

Weakness typeCWE-362Race condition

How to fix

Update

cisco meraki_mx65_firmware18.211.2 or later
cisco meraki_mx64_firmware18.211.2 or later
cisco meraki_z4c_firmware18.211.2 or later
cisco meraki_z4_firmware18.211.2 or later
cisco meraki_z3c_firmware18.211.2 or later
cisco meraki_z3_firmware18.211.2 or later
cisco meraki_vmx_firmware18.211.2 or later
cisco meraki_mx600_firmware18.211.2 or later
cisco meraki_mx450_firmware18.211.2 or later
cisco meraki_mx400_firmware18.211.2 or later
cisco meraki_mx250_firmware18.211.2 or later
cisco meraki_mx105_firmware18.211.2 or later

Affected products

Product	Affected versions	Fixed in
cisco meraki_mx65_firmware	17.6.0 ≤ v < 18.211.2	18.211.2
cisco meraki_mx64_firmware	17.6.0 ≤ v < 18.211.2	18.211.2
cisco meraki_z4c_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_z4_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_z3c_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_z3_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_vmx_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx600_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx450_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx400_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx250_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx105_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx100_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx95_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx85_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx84_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx75_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx68w_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx68cw_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx68_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx67w_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx67c_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx67_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx65w_firmware	16.2 ≤ v < 18.211.2	18.211.2
cisco meraki_mx64w_firmware	16.2 ≤ v < 18.211.2	18.211.2

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