#VU98032 Race condition in Cisco Systems, Inc products - CVE-2024-20509

Vulnerability identifier: #VU98032

Vulnerability risk: Medium

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2024-20509

CWE-ID: CWE-362

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Meraki MX
Cisco Meraki MX67W
Cisco Meraki MX68CW
Cisco Meraki MX68W
Cisco Meraki Z3C
Cisco Meraki MX64
Cisco Meraki MX64W
Cisco Meraki MX65
Cisco Meraki MX65W
Cisco Meraki MX67
Cisco Meraki MX67C
Cisco Meraki MX68
Cisco Meraki MX75
Cisco Meraki MX84
Cisco Meraki MX85
Cisco Meraki MX95
Cisco Meraki MX100
Cisco Meraki MX105
Cisco Meraki MX250
Cisco Meraki MX400
Cisco Meraki MX450
Cisco Meraki MX600
Cisco Meraki vMX
Cisco Meraki Z3
Cisco Meraki Z4
Cisco Meraki Z4C

Software vendor:
Cisco Systems, Inc

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition during the VPN authentication process. A remote attacker can correctly guess an authentication handler and then send specially crafted HTTPS requests to cause a denial of service condition on the target system.

Install updates from vendor's website.

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-meraki-mx-vpn-dos-by-QWUkqV7X