CVE-2022-20756

Cisco Identity Services Engine RADIUS Service 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 RADIUS feature of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause the affected system to stop processing RADIUS packets. This vulnerability is due to improper handling of certain RADIUS requests. An attacker could exploit this vulnerability by attempting to authenticate to a network or a service where the access server is using Cisco ISE as the RADIUS server. A successful exploit could allow the attacker to cause Cisco ISE to stop processing RADIUS requests, causing authentication/authorization timeouts, which would then result in legitimate requests being denied access. Note: To recover the ability to process RADIUS packets, a manual restart of the affected Policy Service Node (PSN) is required. See the Details section for more information.

Una vulnerabilidad en la función RADIUS de Cisco Identity Services Engine (ISE) podría permitir a un atacante remoto no autenticado causar que el sistema afectado deje de procesar paquetes RADIUS. Esta vulnerabilidad es debido al manejo inapropiado de determinadas peticiones RADIUS. Un atacante podría explotar esta vulnerabilidad intentando autenticarse en una red o un servicio en el que el servidor de acceso esté utilizando Cisco ISE como servidor RADIUS. Una explotación con éxito podría permitir al atacante hacer que Cisco ISE dejara de procesar las peticiones RADIUS, causando tiempos de espera de autenticación/autorización, lo que resulta en que sea denegado el acceso a peticiones legítimas. Nota: Para recuperar la capacidad de procesar paquetes RADIUS, es necesario reiniciar manualmente el Policy Service Node (PSN) afectado. Consulte la sección Detalles para más información

*Credits: N/A

CVSS Scores

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

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* 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
2022-04-06 CVE Published
2024-11-06 CVE Updated
2024-11-10 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-399: Resource Management Errors

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-ise-dos-JLh9TxBp	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"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.2.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.2.0"		patch17		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.4.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.4.0"		patch12		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.4.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.4.0"		patch13		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.4.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.4.0"		patch14		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch10		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch5		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch6		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch7		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch8		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.6.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.6.0"		patch9		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.7.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.7.0"		patch2		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.7.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.7.0"		patch3		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.7.0 Search vendor "Cisco" for product "Identity Services Engine" and version "2.7.0"		patch4		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				2.7.0.356 Search vendor "Cisco" for product "Identity Services Engine" and version "2.7.0.356"		patch1		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				3.0.0 Search vendor "Cisco" for product "Identity Services Engine" and version "3.0.0"		-		Affected
Cisco Search vendor "Cisco"		Identity Services Engine Search vendor "Cisco" for product "Identity Services Engine"				3.1 Search vendor "Cisco" for product "Identity Services Engine" and version "3.1"		-		Affected