Cisco Adaptive Security Appliance Software Kerberos Authentication Bypass Vulnerability (Cisco Cisco Adaptive Security Appliance (ASA) Software)
At a glance
- Source
- NVD
- EPSS
- EPSS 2.42 % · percentile 84 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Modified
Description
A vulnerability in the Kerberos authentication feature of Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to impersonate the Kerberos key distribution center (KDC) and bypass authentication on an affected device that is configured to perform Kerberos authentication for VPN or local device access. The vulnerability is due to insufficient identity verification of the KDC when a successful authentication response is received. An attacker could exploit this vulnerability by spoofing the KDC server response to the ASA device. This malicious response would not have been authenticated by the KDC. A successful attack could allow an attacker to bypass Kerberos authentication.
Weaknesses (CWE)
- CWE-287 — Improper Authentication
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | HIGH 8.1 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | cisco |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.0 | HIGH 8.1 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · psirt@cisco.com (Secondary) |
| CVSS 2.0 | MEDIUM 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2020-24396
- GCVE · GCVE-0-2020-3125
CERT-FR advisories
- CERTFR-2020-AVI-274 — Multiples vulnérabilités dans les produits Cisco · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:cisco:asa_5505_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:asa_5510_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:asa_5512-x_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:asa_5515-x_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:asa_5520_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:asa_5525-x_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:asa_5540_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:asa_5545-x_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:asa_5550_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:asa_5555-x_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:asa_5580_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:asa_5585-x_firmware:9.10\(1.220\):*:*:*:*:*:*:*cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*≥ 9.8 < 9.8.4.15cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*≥ 9.9 < 9.9.2.66cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*≥ 9.10 < 9.10.1.37cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*≥ 9.12 < 9.12.3.2cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*≥ 9.13 < 9.13.1.7
Affected products
| Product | Versions |
|---|---|
| Cisco · Cisco Adaptive Security Appliance (ASA) 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 |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| 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 |