CVE-2021-1453
Cisco IOS XE Software for the Catalyst 9000 Family Arbitrary Code Execution Vulnerability
At a glance
- Source
- NVD
- EPSS
- EPSS 0.23 % · percentile 14 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Modified
Description
A vulnerability in the software image verification functionality of Cisco IOS XE Software for the Cisco Catalyst 9000 Family of switches could allow an unauthenticated, physical attacker to execute unsigned code at system boot time. The vulnerability is due to an improper check in the code function that manages the verification of the digital signatures of system image files during the initial boot process. An attacker could exploit this vulnerability by loading unsigned software on an affected device. A successful exploit could allow the attacker to boot a malicious software image or execute unsigned code and bypass the image verification check part of the secure boot process of an affected device. To exploit this vulnerability, the attacker would need to have unauthenticated physical access to the device or obtain privileged access to the root shell on the device.
Weaknesses (CWE)
- CWE-347 — Improper Verification of Cryptographic Signature
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | cisco |
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · psirt@cisco.com (Secondary) |
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | HIGH 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-6920
- GCVE · GCVE-0-2021-1453
CERT-FR advisories
- CERTFR-2021-AVI-219 — Multiples vulnérabilités dans les produits Cisco · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.6.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.6.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.6.3:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.6.4:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.6.4a:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.6.4s:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.6.5:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.6.6:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.6.7:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.6.8:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.7.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.8.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.8.1a:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.8.1s:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.9.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.9.1s:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.9.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.9.2s:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.9.3:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.9.3s:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.9.4:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.9.5:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.9.6:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.10.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.10.1e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.10.1s:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.11.1s:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.11.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.12.1c:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.12.2s:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.12.2t:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:16.12.3:*:*:*:*:*:*:*- +15 more
Affected products
| Product | Versions |
|---|---|
| Cisco · Cisco IOS XE 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 |