CVE-2021-1591
Cisco Nexus 9500 Series Switches Access Control List Bypass Vulnerability
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
A vulnerability in the EtherChannel port subscription logic of Cisco Nexus 9500 Series Switches could allow an unauthenticated, remote attacker to bypass access control list (ACL) rules that are configured on an affected device. This vulnerability is due to oversubscription of resources that occurs when applying ACLs to port channel interfaces. An attacker could exploit this vulnerability by attempting to access network resources that are protected by the ACL. A successful exploit could allow the attacker to access network resources that would be protected by the ACL that was applied on the port channel interface.
Una vulnerabilidad en la lógica de suscripción de puertos EtherChannel de Cisco Nexus 9500 Series Switches podría permitir a un atacante remoto no autenticado omitir las reglas de la lista de control de acceso (ACL) configuradas en un dispositivo afectado. Esta vulnerabilidad es debido a la sobresuscripción de recursos que ocurre cuando se aplican las ACL a las interfaces del canal de puertos. Un atacante podría explotar esta vulnerabilidad al intentar acceder a los recursos de red que están protegidos por la ACL. Una explotación con éxito podría permitir al atacante acceder a los recursos de red que estarían protegidos por la ACL que se aplicó en la interfaz del canal de puertos.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2020-11-13 CVE Reserved
- 2021-08-25 CVE Published
- 2024-05-10 EPSS Updated
- 2024-09-16 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-284: Improper Access Control
CAPEC
References (1)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nexus-acl-vrvQYPVe | 2023-11-07 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Cisco Search vendor "Cisco" | Nx-os Search vendor "Cisco" for product "Nx-os" | 9.3\(4\) Search vendor "Cisco" for product "Nx-os" and version "9.3\(4\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Nexus 9500 16-slot Search vendor "Cisco" for product "Nexus 9500 16-slot" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Nx-os Search vendor "Cisco" for product "Nx-os" | 9.3\(4\) Search vendor "Cisco" for product "Nx-os" and version "9.3\(4\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Nexus 9500 4-slot Search vendor "Cisco" for product "Nexus 9500 4-slot" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Nx-os Search vendor "Cisco" for product "Nx-os" | 9.3\(4\) Search vendor "Cisco" for product "Nx-os" and version "9.3\(4\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Nexus 9500 8-slot Search vendor "Cisco" for product "Nexus 9500 8-slot" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Nx-os Search vendor "Cisco" for product "Nx-os" | 9.3\(4\) Search vendor "Cisco" for product "Nx-os" and version "9.3\(4\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Nexus 9504 Search vendor "Cisco" for product "Nexus 9504" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Nx-os Search vendor "Cisco" for product "Nx-os" | 9.3\(4\) Search vendor "Cisco" for product "Nx-os" and version "9.3\(4\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Nexus 9508 Search vendor "Cisco" for product "Nexus 9508" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Nx-os Search vendor "Cisco" for product "Nx-os" | 9.3\(4\) Search vendor "Cisco" for product "Nx-os" and version "9.3\(4\)" | - |
Affected
| in | Cisco Search vendor "Cisco" | Nexus 9516 Search vendor "Cisco" for product "Nexus 9516" | - | - |
Safe
|