CVE-2021-1451
Cisco IOS XE Software Easy Virtual Switching System Arbitrary Code Execution Vulnerability
At a glance
- Source
- NVD
- EPSS
- EPSS 3.32 % · percentile 89 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Modified
Description
A vulnerability in the Easy Virtual Switching System (VSS) feature of Cisco IOS XE Software for Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches could allow an unauthenticated, remote attacker to execute arbitrary code on the underlying Linux operating system of an affected device. The vulnerability is due to incorrect boundary checks of certain values in Easy VSS protocol packets that are destined for an affected device. An attacker could exploit this vulnerability by sending crafted Easy VSS protocol packets to UDP port 5500 while the affected device is in a specific state. When the crafted packet is processed, a buffer overflow condition may occur. A successful exploit could allow the attacker to trigger a denial of service (DoS) condition or execute arbitrary code with root privileges on the underlying Linux operating system of the affected device.
Weaknesses (CWE)
- CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | cisco |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · psirt@cisco.com (Secondary) |
| 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 2.0 | HIGH 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-6918
- GCVE · GCVE-0-2021-1451
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:3.6.0be:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.0e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.1e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.2e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.3e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.4e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.5ae:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.5be:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.5e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.6e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.7e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.8e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.9e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.6.10e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.7.0e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.7.1e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.7.2e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.7.3e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.7.4e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.7.5e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.0e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.1e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.2e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.3e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.4e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.5ae:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.5e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.6e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.7e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.8e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.9e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.8.10e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.9.0e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.9.1e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.9.2be:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.9.2e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.10.0ce:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.10.0e:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.10.1ae:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xe:3.10.1e:*:*:*:*:*:*:*- +14 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 |