CVE-2019-9498 : Security Advisory and Response
Learn about CVE-2019-9498, a vulnerability in hostapd EAP Server allowing unauthorized network access. Find out affected systems, exploitation details, and mitigation steps.
A vulnerability in the implementation of EAP-PWD in hostapd EAP Server allows attackers to bypass authentication and gain unauthorized network access.
Understanding CVE-2019-9498
This CVE involves a flaw in the validation process of scalar and element values in EAP-PWD-Commit, potentially leading to unauthorized access.
What is CVE-2019-9498?
The vulnerability in hostapd EAP Server's EAP-PWD implementation allows attackers to exploit invalid scalar/element values to authenticate without the password, granting unauthorized network access.
The Impact of CVE-2019-9498
The vulnerability enables attackers to gain access to the session key and network without needing or knowing the password, posing a significant security risk.
Technical Details of CVE-2019-9498
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The flaw in hostapd EAP Server's EAP-PWD implementation allows attackers to bypass authentication by using invalid scalar/element values.
Affected Systems and Versions
- Products: hostapd with EAP-pwd support, wpa_supplicant with EAP-pwd support, hostapd with SAE support, wpa_supplicant with SAE support
- Versions: Up to and including 2.7 for EAP-pwd support, up to and including 2.4 for SAE support
Exploitation Mechanism
Attackers exploit the lack of validation on scalar and element values in EAP-PWD-Commit to authenticate without the required password.
Mitigation and Prevention
Protecting systems from CVE-2019-9498 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update hostapd and wpa_supplicant to versions beyond 2.7 for EAP-pwd support and 2.4 for SAE support
- Monitor network activity for any unauthorized access
Long-Term Security Practices
- Regularly update software and firmware to patch known vulnerabilities
- Implement network segmentation and access controls to limit unauthorized access
Patching and Updates
- Apply security patches provided by the vendors to address the vulnerability