CVE-2024-20501

High

Description

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.

SeverityHigh

CVSS8.6

Exploit probability43. percentile0.5%

Product

Cisco Meraki Mx65 Firmware

PublishedOct 2, 2024

First seenOct 2, 2024

Weakness typeCWE-787Out-of-bounds write

How to fix

Update

cisco meraki_mx65_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
cisco meraki_mx100_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	—
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

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.