CVE-2020-3206

Cisco IOS XE Software Catalyst 9800 Series Wireless Controllers Denial of Service Vulnerability

Severity Score

4.7

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

A vulnerability in the handling of IEEE 802.11w Protected Management Frames (PMFs) of Cisco Catalyst 9800 Series Wireless Controllers that are running Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to terminate a valid user connection to an affected device. The vulnerability exists because the affected software does not properly validate 802.11w disassociation and deauthentication PMFs that it receives. An attacker could exploit this vulnerability by sending a spoofed 802.11w PMF from a valid, authenticated client on a network adjacent to an affected device. A successful exploit could allow the attacker to terminate a single valid user connection to the affected device.

Una vulnerabilidad en el manejo de IEEE 802.11w Protected Management Frames (PMFs) de Cisco Catalyst 9800 Series Wireless Controllers que son ejecutados en el Cisco IOS XE Software, podría permitir a un atacante adyacente no autenticado finalizar una conexión de usuario válida en un dispositivo afectado. La vulnerabilidad se presenta porque el software afectado no comprueba apropiadamente los PMF de disociación y desautenticación de 802.11w que los recibe. Un atacante podría explotar esta vulnerabilidad mediante el envío de un PMF 802.11w falsificado desde un cliente autenticado válido en una red adyacente hacia un dispositivo afectado. Una explotación con éxito podría permitir al atacante terminar una conexión de usuario válida única en el dispositivo afectado.

*Credits: N/A

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2019-12-12 CVE Reserved
2020-06-03 CVE Published
2023-03-08 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
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-dos-AnvKvMxR	2021-09-17

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"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1 Search vendor "Cisco" for product "Ios Xe" and version "16.10.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1e Search vendor "Cisco" for product "Ios Xe" and version "16.10.1e"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1s Search vendor "Cisco" for product "Ios Xe" and version "16.10.1s"		-		Affected