Description
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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None
Affected products
- cisco / Cisco Firepower Threat Defense Softwaren/a – n/a
- cisco / ios_xe17.4.1
- cisco / meraki_mx100_firmware
- cisco / meraki_mx250_firmware
- cisco / meraki_mx450_firmware
- cisco / meraki_mx64_firmware
- cisco / meraki_mx64w_firmware
- cisco / meraki_mx67c_firmware
- cisco / meraki_mx67_firmware
- cisco / meraki_mx67w_firmware
- cisco / meraki_mx68cw_firmware
- cisco / meraki_mx68_firmware
- cisco / meraki_mx68w_firmware
- cisco / meraki_mx84_firmware
- cisco / secure_firewall_management_center2.9.14.0 – 2.9.14.0
- cisco / secure_firewall_management_center3.0.1 – 3.0.1
- cisco / secure_firewall_management_center2.9.17 – 2.9.17
- cisco / secure_firewall_management_center2.9.15 – 2.9.15
- cisco / secure_firewall_management_center2.9.18 – 2.9.18
- cisco / secure_firewall_management_center2.9.16 – 2.9.16
- cisco / secure_firewall_threat_defense6.7.0
- snort / snort2.9.17
Updated 18m ago · 8 sources