Multiple Cisco Products Snort Application Detection Engine Policy Bypass Vulnerability (Cisco Cisco Firepower Threat Defense Software)
At a glance
- Source
- NVD
- EPSS
- EPSS 2.19 % · percentile 82 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Modified
Description
Multiple Cisco products are affected by a vulnerability in the Snort application detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. The vulnerability is due to a flaw in the detection algorithm. An attacker could exploit this vulnerability by sending crafted packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured policies and deliver a malicious payload to the protected network.
Weaknesses (CWE)
- CWE-670 — Always-Incorrect Control Flow Implementation
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | MEDIUM 4.0 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N | cisco |
| 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 3.0 | MEDIUM 4.0 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N | NVD · psirt@cisco.com (Secondary) |
| 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-2021-6703
- GCVE · GCVE-0-2021-1236
Affected configurations (NVD CPE)
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*< 17.4.1cpe:2.3:a:cisco:secure_firewall_management_center:2.9.14.0:*:*:*:*:*:*:*cpe:2.3:a:cisco:secure_firewall_management_center:2.9.14.14:*:*:*:*:*:*:*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_threat_defense:*:*:*:*:*:*:*:*< 6.5.0.5cpe:2.3:a:snort:snort:*:*:*:*:*:*:*:*< 2.9.14
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 |