CVE-2018-0247 : Vulnerability Insights and Analysis

A security weakness in Web Authentication (WebAuth) clients for Cisco Wireless LAN Controller (WLC) and Aironet Access Points running Cisco IOS Software allows adjacent, unauthenticated attackers to bypass authentication and pass network traffic.

Understanding CVE-2018-0247

This CVE involves a vulnerability in the authentication process for WebAuth clients in a specific configuration.

What is CVE-2018-0247?

The vulnerability allows attackers to bypass authentication by sending traffic to local network resources without undergoing the authentication process.

The Impact of CVE-2018-0247

Successful exploitation enables attackers to bypass authentication and pass traffic.
Affects Cisco Aironet Access Points running Cisco IOS Software and Cisco Wireless LAN Controller (WLC) versions older than 8.5.110.0.

Technical Details of CVE-2018-0247

This section provides detailed technical information about the CVE.

Vulnerability Description

Incorrect implementation of the authentication process for WebAuth clients in a specific configuration.

Affected Systems and Versions

Cisco Aironet Access Points running Cisco IOS Software and Cisco Wireless LAN Controller (WLC) versions older than 8.5.110.0.

Exploitation Mechanism

Attacker sends traffic to local network resources without going through authentication.

Mitigation and Prevention

Steps to address and prevent the CVE.

Immediate Steps to Take

Update affected systems to Cisco Wireless LAN Controller (WLC) versions 8.5.110.0 or newer.
Implement proper network segmentation and access control.

Long-Term Security Practices

Regularly monitor and audit network traffic for anomalies.
Train employees on recognizing and reporting suspicious network activity.

Patching and Updates

Apply patches and updates provided by Cisco to address the vulnerability.