CVE-2019-13377: Medium severity w1.fi hostapd vulnerability
Last updated 25 August 2025
Other sources
The implementations of SAE and EAP-pwd in hostapd and wpasupplicant 2.x through 2.8 are vulnerable to side-channel attacks as a result of observable timing differences and cache access patterns when Brainpool curves are used. An attacker may be able to gain leaked information from a side-channel attack that can be used for full password recovery.
— Launchpad
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2019-13377?
CVE-2019-13377 is a vulnerability in the implementations of SAE and EAP-pwd in hostapd and wpa_supplicant 2.x through 2.8.
How severe is CVE-2019-13377?
CVE-2019-13377 has a severity rating of 5.9 (medium).
What is the affected software?
The affected software includes hostapd and wpa_supplicant 2.x through 2.8, W1.fi Hostapd, Fedora 30, Canonical Ubuntu Linux 18.04, Canonical Ubuntu Linux 19.04, and Debian Debian Linux 10.0.
How can I fix CVE-2019-13377?
To fix CVE-2019-13377, update the affected software to the recommended versions: wpa 2:2.9-1 or 2:2.7+git20190128+0c1e29f-6+deb10u1 for Debian, wpa 2:2.6-15ubuntu2.4 for Ubuntu Bionic, wpa 2:2.6-21ubuntu3.2 for Ubuntu Disco.
Where can I find more information about CVE-2019-13377?
You can find more information about CVE-2019-13377 on the Debian Security Tracker, MITRE CVE database, and the official W1.fi security advisory.