CVE-2018-0247

Description

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.

Category

4.7
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.46%
Vendor Advisory cisco.com
Affected: n/a Cisco Wireless LAN Controller and Aironet Access Points
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/104087 vdb entry third party advisory
http://www.securitytracker.com/id/1040815 vdb entry third party advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-aironet-auth vendor advisory
http://www.securitytracker.com/id/1040814 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2018-0247?
CVE-2018-0247 has been scored as a medium severity vulnerability.
How to fix CVE-2018-0247?
To fix CVE-2018-0247, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-0247 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-0247 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-0247?
CVE-2018-0247 affects n/a Cisco Wireless LAN Controller and Aironet Access Points.
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