Multiple Cisco Products Snort TCP Fast Open File Policy Bypass Vulnerability (Cisco Cisco Firepower Threat Defense Software)
At a glance
- Source
- NVD
- EPSS
- EPSS 2.05 % · percentile 81 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-693 — Protection Mechanism Failure
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N | cisco |
| CVSS 3.1 | MEDIUM 5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N | NVD · psirt@cisco.com (Secondary) |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-6691
- GCVE · GCVE-0-2021-1224
Affected configurations (NVD CPE)
cpe:2.3:a:cisco:secure_firewall_management_center:2.9.14.0:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_management_center:2.9.15:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_management_center:2.9.16:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_management_center:2.9.17:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_management_center:2.9.18:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_management_center:3.0.1:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*< 6.7.0cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*< 17.4.1cpe:2.3:a:snort:snort:*:*:*:*:*:*:*:*< 2.9.17cpe:2.3:o:cisco:meraki_mx64_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:cisco:meraki_mx64w_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:cisco:meraki_mx67_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:cisco:meraki_mx67c_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:cisco:meraki_mx67w_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:cisco:meraki_mx68_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:cisco:meraki_mx68cw_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:cisco:meraki_mx68w_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:cisco:meraki_mx100_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:cisco:meraki_mx84_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:cisco:meraki_mx250_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:cisco:meraki_mx450_firmware:-:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Cisco · Cisco Firepower Threat Defense Software | affected n/a |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |