CVE-2017-12213

Severity Score

4.3

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the dynamic access control list (ACL) feature of Cisco IOS XE Software running on Cisco Catalyst 4000 Series Switches could allow an unauthenticated, adjacent attacker to cause dynamic ACL assignment to fail and the port to fail open. This could allow the attacker to pass traffic to the default VLAN of the affected port. The vulnerability is due to an uncaught error condition that may occur during the reassignment of the auth-default-ACL dynamic ACL to a switch port after 802.1x authentication fails. A successful exploit of this issue could allow a physically adjacent attacker to bypass 802.1x authentication and cause the affected port to fail open, allowing the attacker to pass traffic to the default VLAN of the affected switch port. Cisco Bug IDs: CSCvc72751.

Una vulnerabilidad en la característica de lista de control de acceso (ACL) dinámica de Cisco IOS XE Software que se ejecuta en Cisco Catalyst 4000 Series Switches podría permitir que un atacante adyacente no autenticado provoque un fallo en la asignación de listas de control de acceso dinámicas y que el puerto falle y quede abierto. Esto podría permitir a un atacante pasar tráfico al VLAN por defecto del puerto afectado. Esta vulnerabilidad se debe a una condición de error no capturado que podría ocurrir durante la reasignación de lista de control de acceso dinámicas auth-default-ACL a un puerto switch después de que la autenticación 802.1 falle. Una explotación con éxito de esta vulnerabilidad podría permitir a un atacante físicamente adyacente omitir la autenticación 802.1x y provocar que el puerto afectado quede abierto por error, permitiendo que el atacante pase tráfico al VLAN por defecto del puerto switch afectado. Cisco Bug IDs: CSCvc72751.

*Credits: N/A

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-08-03 CVE Reserved
2017-09-07 CVE Published
2023-03-10 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication

CAPEC

References (3)

URL	Tag	Source
http://www.securityfocus.com/bid/100663	Third Party Advisory
http://www.securitytracker.com/id/1039284	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-cat	2019-10-09

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"	-	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 4000 Search vendor "Cisco" for product "Catalyst 4000"	-	-	Safe