CVE-2020-3429

Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family WPA Denial of Service Vulnerability

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the WPA2 and WPA3 security implementation of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family could allow an unauthenticated, adjacent attacker to cause denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect packet processing during the WPA2 and WPA3 authentication handshake when configured for dot1x or pre-shared key (PSK) authentication key management (AKM) with 802.11r BSS Fast Transition (FT) enabled. An attacker could exploit this vulnerability by sending a crafted authentication packet to an affected device. A successful exploit could cause an affected device to reload, resulting in a DoS condition.

Una vulnerabilidad en la implementación de seguridad WPA2 y WPA3 de Cisco IOS XE Wireless Controller Software para Cisco Catalyst 9000 Family, podría permitir a un atacante adyacente no autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado. La vulnerabilidad es debido al procesamiento incorrecto de paquetes durante el protocolo de enlace de autenticación WPA2 y WPA3 cuando se configura para la administración de claves de autenticación (AKM) dot1x o de clave precompartida (PSK) con 802.11r BSS Fast Transition (FT) habilitado. Un atacante podría explotar esta vulnerabilidad mediante el envío de un paquete de autenticación diseñado hacia un dispositivo afectado. Una explotación con éxito podría hacer que un dispositivo afectado se recargue, resultando en una condición DoS.

*Credits: N/A

CVSS Scores

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-12 CVE Reserved
2020-09-24 CVE Published
2023-06-10 EPSS Updated
2024-09-16 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-wpa-dos-cXshjerc	2021-08-06

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	16.12.1s Search vendor "Cisco" for product "Ios Xe" and version "16.12.1s"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9300 Search vendor "Cisco" for product "Catalyst 9300"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	16.12.1s Search vendor "Cisco" for product "Ios Xe" and version "16.12.1s"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9400 Search vendor "Cisco" for product "Catalyst 9400"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	16.12.1s Search vendor "Cisco" for product "Ios Xe" and version "16.12.1s"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9500 Search vendor "Cisco" for product "Catalyst 9500"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	16.12.1s Search vendor "Cisco" for product "Ios Xe" and version "16.12.1s"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-40 Search vendor "Cisco" for product "Catalyst 9800-40"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	16.12.1s Search vendor "Cisco" for product "Ios Xe" and version "16.12.1s"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-80 Search vendor "Cisco" for product "Catalyst 9800-80"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	16.12.1s Search vendor "Cisco" for product "Ios Xe" and version "16.12.1s"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-cl Search vendor "Cisco" for product "Catalyst 9800-cl"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	16.12.1s Search vendor "Cisco" for product "Ios Xe" and version "16.12.1s"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-l Search vendor "Cisco" for product "Catalyst 9800-l"	-	-	Safe