CVE-2018-0090

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in management interface access control list (ACL) configuration of Cisco NX-OS System Software could allow an unauthenticated, remote attacker to bypass configured ACLs on the management interface. This could allow traffic to be forwarded to the NX-OS CPU for processing, leading to high CPU utilization and a denial of service (DoS) condition. The vulnerability is due to a bad code fix in the 7.3.2 code train that could allow traffic to the management interface to be misclassified and not match the proper configured ACLs. An attacker could exploit this vulnerability by sending crafted traffic to the management interface. An exploit could allow the attacker to bypass the configured management interface ACLs and impact the CPU of the targeted device, resulting in a DoS condition. This vulnerability affects the following Cisco products running Cisco NX-OS System Software: Multilayer Director Switches, Nexus 2000 Series Switches, Nexus 3000 Series Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in standalone NX-OS mode. Cisco Bug IDs: CSCvf31132.

Una vulnerabilidad en la configuración de la lista de control de acceso (ACL) de la interfaz de administración de Cisco NX-OS System Software podría permitir que un atacante remoto no autenticado omita las ACL configuradas en la interfaz de administración. Esto podría permitir que el tráfico se redirija a la CPU NX-OS para procesamiento, provocando un uso elevado de recursos de la CPU y una condición de denegación de servicio (DoS). La vulnerabilidad se debe a una mala solución en el tren de código 7.3.2 que podría permitir que la interfaz de administración se clasifique de manera incorrecta y no coincida con las listas de control de acceso configuradas correctamente. Un atacante podría explotar esta vulnerabilidad mediante el envío de tráfico manipulado a través de la interfaz de administración. Su explotación podría permitir que el atacante omita las listas de control de acceso de la interfaz de administración y afectar a la CPU del dispositivo afectado, resultando en una condición de denegación de servicio (DoS). Esta vulnerabilidad afecta a los siguientes productos de Cisco que ejecutan Cisco NX-OS System Software: Multilayer Director Switches, Nexus 2000 Series Switches, Nexus 3000 Series Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches en modo NX-OS standalone. Cisco Bug IDs: CSCvf31132.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-11-27 CVE Reserved
2018-01-18 CVE Published
2023-07-21 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-400: Uncontrolled Resource Consumption

CAPEC

References (3)

URL	Tag	Source
http://www.securityfocus.com/bid/102753	Third Party Advisory
http://www.securitytracker.com/id/1040247	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-nxos	2019-10-09

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"				7.3\(2\)n1\(0.6\) Search vendor "Cisco" for product "Nx-os" and version "7.3\(2\)n1\(0.6\)"		-		Affected
Cisco Search vendor "Cisco"		Nx-os Search vendor "Cisco" for product "Nx-os"				8.3\(0\)kms\(0.31\) Search vendor "Cisco" for product "Nx-os" and version "8.3\(0\)kms\(0.31\)"		-		Affected
Cisco Search vendor "Cisco"		Nx-os Search vendor "Cisco" for product "Nx-os"				8.8\(3.5\)s0 Search vendor "Cisco" for product "Nx-os" and version "8.8\(3.5\)s0"		-		Affected