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 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.

• cisco meraki mx65 firmware (>= 17.6.0 < 18.211.2) • cisco meraki mx64 firmware (>= 17.6.0 < 18.211.2) • cisco meraki z4c firmware (>= 16.2 < 18.211.2) • cisco meraki z4 firmware (>= 16.2 < 18.211.2) • cisco meraki z3c firmware (>= 16.2 < 18.211.2) • cisco meraki z3 firmware (>= 16.2 < 18.211.2) • cisco meraki vmx firmware (>= 16.2 < 18.211.2) • cisco meraki mx600 firmware (>= 16.2 < 18.211.2) • cisco meraki mx450 firmware (>= 16.2 < 18.211.2) • cisco meraki mx400 firmware (>= 16.2 < 18.211.2) • cisco meraki mx250 firmware (>= 16.2 < 18.211.2) • cisco meraki mx105 firmware (>= 16.2 < 18.211.2) • cisco meraki mx100 firmware (>= 16.2 < 18.211.2) • cisco meraki mx95 firmware (>= 16.2 < 18.211.2) • cisco meraki mx85 firmware (>= 16.2 < 18.211.2) • cisco meraki mx84 firmware (>= 16.2 < 18.211.2) • cisco meraki mx75 firmware (>= 16.2 < 18.211.2) • cisco meraki mx68w firmware (>= 16.2 < 18.211.2) • cisco meraki mx68cw firmware (>= 16.2 < 18.211.2) • cisco meraki mx68 firmware (>= 16.2 < 18.211.2) • cisco meraki mx67w firmware (>= 16.2 < 18.211.2) • cisco meraki mx67c firmware (>= 16.2 < 18.211.2) • cisco meraki mx67 firmware (>= 16.2 < 18.211.2) • cisco meraki mx65w firmware (>= 16.2 < 18.211.2) • cisco meraki mx64w firmware (>= 16.2 < 18.211.2)