CVE-2018-0247

Severity Score

4.7

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in Web Authentication (WebAuth) clients for the Cisco Wireless LAN Controller (WLC) and Aironet Access Points running Cisco IOS Software could allow an unauthenticated, adjacent attacker to bypass authentication and pass traffic. The vulnerability is due to incorrect implementation of authentication for WebAuth clients in a specific configuration. An attacker could exploit this vulnerability by sending traffic to local network resources without having gone through authentication. A successful exploit could allow the attacker to bypass authentication and pass traffic. This affects Cisco Aironet Access Points running Cisco IOS Software and Cisco Wireless LAN Controller (WLC) releases prior to 8.5.110.0 for the following specific WLC configuration only: (1) The Access Point (AP) is configured in FlexConnect Mode with NAT. (2) The WLAN is configured for central switching, meaning the client is being assigned a unique IP address. (3) The AP is configured with a Split Tunnel access control list (ACL) for access to local network resources, meaning the AP is doing the NAT on the connection. (4) The client is using WebAuth. This vulnerability does not apply to .1x clients in the same configuration. Cisco Bug IDs: CSCvc79502, CSCvf71789.

Una vulnerabilidad en los clientes Web Authentication (WebAuth) para Cisco Wireless LAN Controller (WLC) y Aironet Access Points que ejecutan el software Cisco IOS podría permitir que un atacante adyacente sin autenticar omita la autenticación y pase tráfico. La vulnerabilidad se debe a la implementación incorrecta de la autenticación para los clientes WebAuth en una configuración específica. Un atacante podría explotar esta vulnerabilidad enviando tráfico a recursos en la red local sin tener que pasar por la autenticación. Su explotación con éxito podría permitir que el atacante omita la autenticación y pase tráfico. Esto afecta a Cisco Aironet Access Points que ejecutan el software Cisco IOS y Cisco Wireless LAN Controller (WLC) en lanzamientos anteriores a la versión 8.5.110.0 solo para la siguiente configuración específica de WLC: (1) El punto de acceso (AP) está configurado en modo FlexConnect con NAT. (2) El WLAN está configurado para switching central, lo que significa que al cliente se le asigna una dirección IP única. (3) El AP está configurado con una lista de control de acceso (ACL) de Split Tunnel para acceder a recursos de la red local, lo que significa que el AP está realizando NAT en la conexión. (4) El cliente está usando WebAuth. La vulnerabilidad no aplica a clientes .1x en la misma configuración. Cisco Bug IDs: CSCvc79502, CSCvf71789.

*Credits: N/A

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

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

2017-11-27 CVE Reserved
2018-05-02 CVE Published
2024-02-15 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication

CAPEC

References (4)

URL	Tag	Source
http://www.securityfocus.com/bid/104087	Third Party Advisory
http://www.securitytracker.com/id/1040814	Third Party Advisory
http://www.securitytracker.com/id/1040815	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-aironet-auth	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"		Wireless Lan Controller Software Search vendor "Cisco" for product "Wireless Lan Controller Software"				8.3\(104.105\) Search vendor "Cisco" for product "Wireless Lan Controller Software" and version "8.3\(104.105\)"		-		Affected
Cisco Search vendor "Cisco"		Aironet Access Point Software Search vendor "Cisco" for product "Aironet Access Point Software"				8.3\(104.105\) Search vendor "Cisco" for product "Aironet Access Point Software" and version "8.3\(104.105\)"		-		Affected
Cisco Search vendor "Cisco"		Aironet Access Point Software Search vendor "Cisco" for product "Aironet Access Point Software"				8.5\(107.52\) Search vendor "Cisco" for product "Aironet Access Point Software" and version "8.5\(107.52\)"		-		Affected