CVE-2020-3170

Cisco NX-OS Software NX-API Denial of Service Vulnerability

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause an NX-API system process to unexpectedly restart. The vulnerability is due to incorrect validation of the HTTP header of a request that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API on an affected device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition in the NX-API service; however, the Cisco NX-OS device itself would still be available and passing network traffic. Note: The NX-API feature is disabled by default.

Una vulnerabilidad en la funcionalidad NX-API de Cisco NX-OS Software, podría permitir a un atacante remoto no autenticado causar que un proceso del sistema NX-API se reinicie inesperadamente. La vulnerabilidad es debido a una comprobación incorrecta del encabezado HTTP de una petición que es enviada hacia la NX-API. Un atacante podría explotar esta vulnerabilidad mediante el envío de una petición HTTP diseñada hacia la NX-API sobre un dispositivo afectado. Una explotación con éxito podría permitir al atacante causar una condición de denegación de servicio (DoS) en el servicio NX-API; sin embargo, el dispositivo Cisco NX-OS por sí mismo estaría aún disponible y pasando tráfico de red. Nota: La funcionalidad NX-API está deshabilitada por defecto.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2019-12-12 CVE Reserved
2020-02-26 CVE Published
2023-05-30 EPSS Updated
2024-11-15 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-nxos-api-dos	2020-03-03

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"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9132t Search vendor "Cisco" for product "Mds 9132t"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9148s Search vendor "Cisco" for product "Mds 9148s"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9148t Search vendor "Cisco" for product "Mds 9148t"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9216 Search vendor "Cisco" for product "Mds 9216"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9216a Search vendor "Cisco" for product "Mds 9216a"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9216i Search vendor "Cisco" for product "Mds 9216i"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9222i Search vendor "Cisco" for product "Mds 9222i"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9506 Search vendor "Cisco" for product "Mds 9506"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9509 Search vendor "Cisco" for product "Mds 9509"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9513 Search vendor "Cisco" for product "Mds 9513"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9706 Search vendor "Cisco" for product "Mds 9706"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9710 Search vendor "Cisco" for product "Mds 9710"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.4\(1\) Search vendor "Cisco" for product "Nx-os" and version " < 8.4\(1\)"	-	Affected	in	Cisco Search vendor "Cisco"	Mds 9718 Search vendor "Cisco" for product "Mds 9718"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.2\(5\) Search vendor "Cisco" for product "Nx-os" and version " < 8.2\(5\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 7000 Search vendor "Cisco" for product "Nexus 7000"	-	-	Safe
Cisco Search vendor "Cisco"	Nx-os Search vendor "Cisco" for product "Nx-os"	< 8.2\(5\) Search vendor "Cisco" for product "Nx-os" and version " < 8.2\(5\)"	-	Affected	in	Cisco Search vendor "Cisco"	Nexus 7700 Search vendor "Cisco" for product "Nexus 7700"	-	-	Safe