CVE-2022-20682

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

Severity Score

8.6

*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 Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of 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 inadequate input validation of incoming CAPWAP packets encapsulating multicast DNS (mDNS) queries. An attacker could exploit this vulnerability by connecting to a wireless network and sending a crafted mDNS query, which would flow through and be processed by the wireless controller. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition.

Una vulnerabilidad en el procesamiento del protocolo de control y aprovisionamiento de puntos de acceso inalámbricos (CAPWAP) de Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family 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 una comprobación inapropiada de la entrada de paquetes CAPWAP entrantes que encapsulan consultas de DNS multidifusión (mDNS). Un atacante podría aprovechar esta vulnerabilidad al conectarse a una red inalámbrica y mediante el envío de una consulta mDNS diseñada, que fluiría y sería procesada por el controlador inalámbrico. Una explotación con éxito podría permitir al atacante causar a el dispositivo afectado bloquearse y se recargarse, resultando en una condición de DoS

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* 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
2022-04-15 CVE Published
2024-11-06 CVE Updated
2024-11-19 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference
CWE-690: Unchecked Return Value to NULL Pointer Dereference

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-capwap-mdns-6PSn7gKU	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"				3.15.1xbs Search vendor "Cisco" for product "Ios Xe" and version "3.15.1xbs"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				3.15.2xbs Search vendor "Cisco" for product "Ios Xe" and version "3.15.2xbs"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1 Search vendor "Cisco" for product "Ios Xe" and version "16.11.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1a Search vendor "Cisco" for product "Ios Xe" and version "16.11.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1b Search vendor "Cisco" for product "Ios Xe" and version "16.11.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1c Search vendor "Cisco" for product "Ios Xe" and version "16.11.1c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1s Search vendor "Cisco" for product "Ios Xe" and version "16.11.1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.2 Search vendor "Cisco" for product "Ios Xe" and version "16.11.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1 Search vendor "Cisco" for product "Ios Xe" and version "16.12.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1a Search vendor "Cisco" for product "Ios Xe" and version "16.12.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1c Search vendor "Cisco" for product "Ios Xe" and version "16.12.1c"		-		Affected
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
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1t Search vendor "Cisco" for product "Ios Xe" and version "16.12.1t"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1w Search vendor "Cisco" for product "Ios Xe" and version "16.12.1w"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1x Search vendor "Cisco" for product "Ios Xe" and version "16.12.1x"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1y Search vendor "Cisco" for product "Ios Xe" and version "16.12.1y"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1z Search vendor "Cisco" for product "Ios Xe" and version "16.12.1z"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1z1 Search vendor "Cisco" for product "Ios Xe" and version "16.12.1z1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1z2 Search vendor "Cisco" for product "Ios Xe" and version "16.12.1z2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.2 Search vendor "Cisco" for product "Ios Xe" and version "16.12.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.2a Search vendor "Cisco" for product "Ios Xe" and version "16.12.2a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.2s Search vendor "Cisco" for product "Ios Xe" and version "16.12.2s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.2t Search vendor "Cisco" for product "Ios Xe" and version "16.12.2t"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.3 Search vendor "Cisco" for product "Ios Xe" and version "16.12.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.3a Search vendor "Cisco" for product "Ios Xe" and version "16.12.3a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.3s Search vendor "Cisco" for product "Ios Xe" and version "16.12.3s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.4 Search vendor "Cisco" for product "Ios Xe" and version "16.12.4"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.4a Search vendor "Cisco" for product "Ios Xe" and version "16.12.4a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.5 Search vendor "Cisco" for product "Ios Xe" and version "16.12.5"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.5a Search vendor "Cisco" for product "Ios Xe" and version "16.12.5a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.5b Search vendor "Cisco" for product "Ios Xe" and version "16.12.5b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.6 Search vendor "Cisco" for product "Ios Xe" and version "16.12.6"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.6a Search vendor "Cisco" for product "Ios Xe" and version "16.12.6a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.1.1 Search vendor "Cisco" for product "Ios Xe" and version "17.1.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.1.1a Search vendor "Cisco" for product "Ios Xe" and version "17.1.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.1.1s Search vendor "Cisco" for product "Ios Xe" and version "17.1.1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.1.1t Search vendor "Cisco" for product "Ios Xe" and version "17.1.1t"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.1.2 Search vendor "Cisco" for product "Ios Xe" and version "17.1.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.1.3 Search vendor "Cisco" for product "Ios Xe" and version "17.1.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1 Search vendor "Cisco" for product "Ios Xe" and version "17.2.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1a Search vendor "Cisco" for product "Ios Xe" and version "17.2.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1r Search vendor "Cisco" for product "Ios Xe" and version "17.2.1r"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1v Search vendor "Cisco" for product "Ios Xe" and version "17.2.1v"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.2 Search vendor "Cisco" for product "Ios Xe" and version "17.2.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.3 Search vendor "Cisco" for product "Ios Xe" and version "17.2.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1 Search vendor "Cisco" for product "Ios Xe" and version "17.3.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1a Search vendor "Cisco" for product "Ios Xe" and version "17.3.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1w Search vendor "Cisco" for product "Ios Xe" and version "17.3.1w"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1x Search vendor "Cisco" for product "Ios Xe" and version "17.3.1x"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1z Search vendor "Cisco" for product "Ios Xe" and version "17.3.1z"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.2 Search vendor "Cisco" for product "Ios Xe" and version "17.3.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.2a Search vendor "Cisco" for product "Ios Xe" and version "17.3.2a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.3 Search vendor "Cisco" for product "Ios Xe" and version "17.3.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.3a Search vendor "Cisco" for product "Ios Xe" and version "17.3.3a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.1 Search vendor "Cisco" for product "Ios Xe" and version "17.4.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.1a Search vendor "Cisco" for product "Ios Xe" and version "17.4.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.1b Search vendor "Cisco" for product "Ios Xe" and version "17.4.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.1c Search vendor "Cisco" for product "Ios Xe" and version "17.4.1c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.2 Search vendor "Cisco" for product "Ios Xe" and version "17.4.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.4.2a Search vendor "Cisco" for product "Ios Xe" and version "17.4.2a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.5.1 Search vendor "Cisco" for product "Ios Xe" and version "17.5.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.5.1a Search vendor "Cisco" for product "Ios Xe" and version "17.5.1a"		-		Affected