CVE-2021-1224

Multiple Cisco products are affected by a vulnerability with TCP Fast Open (TFO) when used in conjunction with the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect detection of the HTTP payload if it is contained at least partially within the TFO connection handshake. An attacker could exploit this vulnerability by sending crafted TFO packets with an HTTP payload through an affected device. A successful exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious payload.

• cisco secure firewall management center 2.9.14.0 • cisco secure firewall management center 2.9.15 • cisco secure firewall management center 2.9.16 • cisco secure firewall management center 2.9.17 • cisco secure firewall management center 2.9.18 • cisco secure firewall management center 3.0.1 • cisco secure firewall threat defense (< 6.7.0) • cisco ios xe (< 17.4.1) • snort snort (< 2.9.17) • cisco meraki mx64 firmware • cisco meraki mx64w firmware • cisco meraki mx67 firmware • cisco meraki mx67c firmware • cisco meraki mx67w firmware • cisco meraki mx68 firmware • cisco meraki mx68cw firmware • cisco meraki mx68w firmware • cisco meraki mx100 firmware • cisco meraki mx84 firmware • cisco meraki mx250 firmware • cisco meraki mx450 firmware