CVE-2019-1826 Explained : Impact and Mitigation

Cisco Aironet Series Access Points Quality of Service Denial of Service Vulnerability

Understanding CVE-2019-1826

This CVE involves a vulnerability in Cisco Aironet Access Point Software that could allow an attacker to trigger a denial of service (DoS) attack on the targeted device.

What is CVE-2019-1826?

The vulnerability arises from inadequate validation of Quality of Service (QoS) fields within Wi-Fi frames, enabling an authenticated attacker in close proximity to exploit this weakness.

The Impact of CVE-2019-1826

The vulnerability could lead to a DoS scenario by causing a crash on the targeted device, affecting the availability of the Cisco Aironet Series Access Point.

Technical Details of CVE-2019-1826

Vulnerability Description

An authenticated attacker near a Cisco Aironet Series Access Point could exploit a QoS weakness, potentially causing a DoS by sending malformed Wi-Fi frames.

Affected Systems and Versions

Product: Cisco Aironet Access Point Software
Vendor: Cisco
Affected Version: 8.5

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Adjacent Network
Privileges Required: Low
Impact: High availability impact
CVSS Base Score: 6.8 (Medium Severity)

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-provided patches promptly
Implement network segmentation to limit attacker proximity
Monitor network traffic for anomalies

Long-Term Security Practices

Regularly update and patch all network devices
Conduct security training for staff on identifying and reporting suspicious activities

Patching and Updates

Refer to the Cisco Security Advisory for specific patch details and instructions