CVE-2019-9499 : Exploit Details and Defense Strategies

A vulnerability in the implementations of EAP-PWD in wpa_supplicant EAP Peer allows attackers to bypass authentication and gain control over the data connection with a client.

Understanding CVE-2019-9499

This CVE involves the lack of validation for scalar and element values in EAP-pwd-Commit, affecting specific versions of hostapd and wpa_supplicant with EAP-pwd and SAE support.

What is CVE-2019-9499?

The vulnerability arises from the failure to validate scalar and element values in EAP-pwd-Commit, enabling unauthorized access and control over the data connection.

The Impact of CVE-2019-9499

The vulnerability allows attackers to authenticate, obtain session keys, and manipulate data connections with affected clients, compromising network security.

Technical Details of CVE-2019-9499

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The issue lies in the lack of proper validation for scalar and element values in EAP-pwd-Commit, enabling unauthorized access and control over data connections.

Affected Systems and Versions

hostapd with EAP-pwd support version 2.7 and earlier
wpa_supplicant with EAP-pwd support version 2.7 and earlier
hostapd with SAE support version 2.4 and earlier
wpa_supplicant with SAE support version 2.4 and earlier

Exploitation Mechanism

Attackers can exploit this vulnerability to successfully authenticate, obtain session keys, and manipulate data connections with clients.

Mitigation and Prevention

Protecting systems from CVE-2019-9499 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update hostapd and wpa_supplicant to versions beyond 2.7 and 2.4, respectively
Implement network segmentation to limit the impact of potential attacks
Monitor network traffic for any suspicious activities

Long-Term Security Practices

Regularly update and patch all network devices and software
Conduct security audits and penetration testing to identify vulnerabilities

Patching and Updates

Apply patches provided by the vendors to address the vulnerability
Stay informed about security advisories and updates from relevant sources