CVE-2020-3231

Cisco IOS Software for Catalyst 2960-L Series Switches and Catalyst CDB-8P Switches 802.1X Authentication Bypass 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 802.1X feature of Cisco Catalyst 2960-L Series Switches and Cisco Catalyst CDB-8P Switches could allow an unauthenticated, adjacent attacker to forward broadcast traffic before being authenticated on the port. The vulnerability exists because broadcast traffic that is received on the 802.1X-enabled port is mishandled. An attacker could exploit this vulnerability by sending broadcast traffic on the port before being authenticated. A successful exploit could allow the attacker to send and receive broadcast traffic on the 802.1X-enabled port before authentication.

Una vulnerabilidad en la funcionalidad 802.1X de Cisco Catalyst 2960-L Series Switches y Cisco Catalyst CDB-8P Switches, podría permitir a un atacante adyacente no autenticado reenviar el tráfico de difusión antes de ser autenticado en el puerto. La vulnerabilidad se presenta porque el tráfico de difusión que se recibe en el puerto habilitado para 802.1X se maneja inapropiadamente. Un atacante podría explotar esta vulnerabilidad mediante el envío de tráfico de difusión en el puerto antes de ser autenticado. Una explotación con éxito podría permitir al atacante enviar y recibir tráfico de difusión en el puerto habilitado para 802.1X antes de la autenticación.

*Credits: N/A

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Adjacent

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* 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-284: Improper Access Control
CWE-863: Incorrect Authorization

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c2960L-DpWA9Re4	2020-06-08

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 Search vendor "Cisco" for product "Ios"				15.2\(5\)e2 Search vendor "Cisco" for product "Ios" and version "15.2\(5\)e2"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(5\)ex Search vendor "Cisco" for product "Ios" and version "15.2\(5\)ex"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(5a\)e Search vendor "Cisco" for product "Ios" and version "15.2\(5a\)e"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(5b\)e Search vendor "Cisco" for product "Ios" and version "15.2\(5b\)e"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(5c\)e Search vendor "Cisco" for product "Ios" and version "15.2\(5c\)e"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(6\)e Search vendor "Cisco" for product "Ios" and version "15.2\(6\)e"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(6\)e0c Search vendor "Cisco" for product "Ios" and version "15.2\(6\)e0c"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(6\)e1 Search vendor "Cisco" for product "Ios" and version "15.2\(6\)e1"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(6\)e1a Search vendor "Cisco" for product "Ios" and version "15.2\(6\)e1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(6\)e1s Search vendor "Cisco" for product "Ios" and version "15.2\(6\)e1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(6\)e2 Search vendor "Cisco" for product "Ios" and version "15.2\(6\)e2"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(6\)e2b Search vendor "Cisco" for product "Ios" and version "15.2\(6\)e2b"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(6\)e3 Search vendor "Cisco" for product "Ios" and version "15.2\(6\)e3"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(6\)e4 Search vendor "Cisco" for product "Ios" and version "15.2\(6\)e4"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(7\)e Search vendor "Cisco" for product "Ios" and version "15.2\(7\)e"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(7\)e0a Search vendor "Cisco" for product "Ios" and version "15.2\(7\)e0a"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(7\)e0b Search vendor "Cisco" for product "Ios" and version "15.2\(7\)e0b"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(7\)e0s Search vendor "Cisco" for product "Ios" and version "15.2\(7\)e0s"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(7a\)e0b Search vendor "Cisco" for product "Ios" and version "15.2\(7a\)e0b"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.2\(7b\)e0b Search vendor "Cisco" for product "Ios" and version "15.2\(7b\)e0b"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.3\(3\)jaa1 Search vendor "Cisco" for product "Ios" and version "15.3\(3\)jaa1"		-		Affected
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				15.3\(3\)jpj Search vendor "Cisco" for product "Ios" and version "15.3\(3\)jpj"		-		Affected