Auth bypass in W1.fi Hostapd
CVE-2019-9497
The implementations of EAP-PWD in hostapd EAP Server and wpa_supplicant EAP Peer do not validate the scalar and element values in EAP-pwd-Commit. This vulnerability may allow an attacker to complete EAP-PWD authentication without knowing the password. However, unless the crypto library does not implement additional checks for the EC point, the attacker will not be able to derive the session key or complete the key exchange. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.4 are affected. Both hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7 are affected.
EPSS: 0.050 (91.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- W1.fi Hostapd
- W1.fi Wpa_supplicant
- Wi-fi Alliance Hostapd With Eap-pwd Support — versions 2.7
- Wi-fi Alliance Hostapd With Sae Support — versions 2.4
- Wi-fi Alliance Wpa_supplicant With Eap-pwd Support — versions 2.7
- Wi-fi Alliance Wpa_supplicant With Sae Support — versions 2.4
- Fedoraproject Fedora — versions 28, 29, 30
Weakness classification (CWE)
References
- cret@cert.org (x_refsource_CONFIRM, Patch, Vendor Advisory)
- cret@cert.org (x_refsource_CONFIRM)
- cret@cert.org (x_refsource_FEDORA, vendor-advisory)
- cret@cert.org (x_refsource_FEDORA, vendor-advisory)
- cret@cert.org (x_refsource_FEDORA, vendor-advisory)
- cret@cert.org (x_refsource_FREEBSD, vendor-advisory)
- cret@cert.org (mailing-list, x_refsource_BUGTRAQ)
- cret@cert.org (x_refsource_MISC)
- cret@cert.org (mailing-list, x_refsource_MLIST)
- cret@cert.org (vendor-advisory, x_refsource_SUSE)
Frequently asked questions
- What is CVE-2019-9497?
- CVE-2019-9497 is a high-severity vulnerability in W1.fi Hostapd, classified under Reflection Attack in an Authentication Protocol. CVSS score: 8.1/10. Published 2019-04-17.
- How severe is CVE-2019-9497?
- High severity. CVSS v3 base score is 8.1 out of 10.