CVE-2022-20856

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

Severity Score

7.5

*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 processing of Control and Provisioning of Wireless Access Points (CAPWAP) Mobility messages in Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to a logic error and improper management of resources related to the handling of CAPWAP Mobility messages. An attacker could exploit this vulnerability by sending crafted CAPWAP Mobility packets to an affected device. A successful exploit could allow the attacker to exhaust resources on the affected device. This would cause the device to reload, resulting in a DoS condition.

Una vulnerabilidad en el procesamiento de los mensajes de Movilidad de Control y Aprovisionamiento de Puntos de Acceso Inalámbricos (CAPWAP) en el Software Controlador Inalámbrico Cisco IOS XE para la Familia Catalyst 9000 podría permitir a un atacante remoto no autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad es debido a un error lógico y a una administración inapropiada de los recursos relacionados con el manejo de los mensajes de movilidad CAPWAP. Un atacante podría explotar esta vulnerabilidad mediante el envío de paquetes CAPWAP Mobility diseñados a un dispositivo afectado. Una explotación con éxito podría permitir al atacante agotar los recursos del dispositivo afectado. Esto causaría una recarga del dispositivo, resultando en una condición de DoS

*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

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2021-11-02 CVE Reserved
2022-09-30 CVE Published
2024-04-20 EPSS Updated
2024-11-01 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-664: Improper Control of a Resource Through its Lifetime

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-c9800-mob-dos-342YAc6J	2023-11-07

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"	17.3.4c Search vendor "Cisco" for product "Ios Xe" and version "17.3.4c"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800 Search vendor "Cisco" for product "Catalyst 9800"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	17.3.4c Search vendor "Cisco" for product "Ios Xe" and version "17.3.4c"	-	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"	17.3.4c Search vendor "Cisco" for product "Ios Xe" and version "17.3.4c"	-	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"	17.3.4c Search vendor "Cisco" for product "Ios Xe" and version "17.3.4c"	-	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"	17.3.4c Search vendor "Cisco" for product "Ios Xe" and version "17.3.4c"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-l Search vendor "Cisco" for product "Catalyst 9800-l"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	17.3.4c Search vendor "Cisco" for product "Ios Xe" and version "17.3.4c"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-l-c Search vendor "Cisco" for product "Catalyst 9800-l-c"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	17.3.4c Search vendor "Cisco" for product "Ios Xe" and version "17.3.4c"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 9800-l-f Search vendor "Cisco" for product "Catalyst 9800-l-f"	-	-	Safe