CVE-2017-12226 Explained : Impact and Mitigation

Cisco IOS XE Software Vulnerability

Understanding CVE-2017-12226

What is CVE-2017-12226?

A security flaw in the web-based Wireless Controller GUI of Cisco IOS XE Software for various Cisco products could allow a remote attacker to escalate privileges on the affected device.

The Impact of CVE-2017-12226

The vulnerability could enable an attacker to gain full control of the device by exploiting inadequate validation of HTTP requests in the GUI.

Technical Details of CVE-2017-12226

Vulnerability Description

The flaw arises from insufficient validation of HTTP requests in the GUI, allowing an attacker to modify the GUI connection state or protocol and escalate privileges.

Affected Systems and Versions

Cisco 5760 Wireless LAN Controllers
Cisco Catalyst 4500E Supervisor Engine 8-E (Wireless) Switches
Cisco New Generation Wireless Controllers (NGWC) 3850 running Cisco IOS XE Software Release 3.7.0E to 3.7.5E

Exploitation Mechanism

Attacker authenticates as a Lobby Administrator user
Modifies GUI connection state or protocol
Elevates privileges to administrator level

Mitigation and Prevention

Immediate Steps to Take

Apply the necessary security patches provided by Cisco
Restrict network access to the GUI interface
Monitor GUI access for any suspicious activities

Long-Term Security Practices

Regularly update and patch all software and firmware
Implement strong authentication mechanisms
Conduct security training for users to recognize and report suspicious activities

Patching and Updates

Ensure all affected devices are updated with the latest patches from Cisco to mitigate the vulnerability.