Auth bypass in W1.fi Hostapd
CVE-2019-9496
An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps when processing the SAE confirm message when in hostapd/AP mode. All version of hostapd with SAE support are vulnerable. An attacker may force the hostapd process to terminate, performing a denial of service attack. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.047 (91.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.045 · newest: 0.047 · change: +0.001
Affected products
- W1.fi Hostapd
- W1.fi Wpa Supplicant
- Wi-Fi Alliance Hostapd With Sae Support — versions 2.7
- Wi-Fi Alliance Wpa Supplicant With Sae Support — versions 2.7
- Fedoraproject Fedora — versions 28, 29, 30
Weakness classification (CWE)
References
- w1.fi/security/2019-3/ (Patch, Vendor Advisory)
- www.synology.com/security/advisory/Synology_SA_19_16
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc (vendor-advisory)
- seclists.org/bugtraq/2019/May/40 (mailing-list)
- packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03…
- lists.opensuse.org/opensuse-security-announce/2020-02/msg00021.html (vendor-advisory)
Frequently asked questions
- What is CVE-2019-9496?
- CVE-2019-9496 is a high-severity vulnerability in W1.fi Hostapd, classified under CWE-642. CVSS score: 7.5/10. Published 2019-04-17.
- How severe is CVE-2019-9496?
- High severity. CVSS v3 base score is 7.5 out of 10.