Cisco Adaptive Security Appliance and Firepower Threat Defense Software Layer 2 Filtering Bypass Vulnerability (Cisco Cisco Adaptive Security Appliance (ASA) Software)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.71 % · percentile 54 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Modified
Description
A vulnerability in the detection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to send data directly to the kernel of an affected device. The vulnerability exists because the software improperly filters Ethernet frames sent to an affected device. An attacker could exploit this vulnerability by sending crafted packets to the management interface of an affected device. A successful exploit could allow the attacker to bypass the Layer 2 (L2) filters and send data directly to the kernel of the affected device. A malicious frame successfully delivered would make the target device generate a specific syslog entry.
Weaknesses (CWE)
- CWE-284 — Improper Access Control
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | MEDIUM 4.3 | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | cisco |
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 3.0 | MEDIUM 4.3 | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | NVD · psirt@cisco.com (Secondary) |
| CVSS 2.0 | MEDIUM 6.1 | AV:A/AC:L/Au:N/C:N/I:C/A:N | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2019-10252
- GCVE · GCVE-0-2019-1695
Affected configurations (NVD CPE)
cpe:2.3:a:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*< 9.8.4cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*≥ 6.2.1 < 6.2.3.12cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*≥ 6.3.0 < 6.3.0.3cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*≥ 9.9 < 9.9.2.50cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*≥ 9.10 < 9.10.1.17
Affected products
| Product | Versions |
|---|---|
| Cisco · Cisco Adaptive Security Appliance (ASA) Software | affected unspecified < 9.8.4 ; affected unspecified < 9.9.2.50 ; affected unspecified < 9.10.1.17 |
| Cisco · Cisco Firepower Threat Defense (FTD) Software | affected unspecified < 6.2.3.12 ; affected unspecified < 6.3.0.3 |
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 |