CVE-2019-13377

Name: CVE-2019-13377
Creator: NVD / NIST
Published: 2019-08-15T17:15:13.41+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 2.19%

Last modified Jun 17, 2026

CVE-2019-13377 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. The implementations of SAE and EAP-pwd in hostapd and wpa_supplicant 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.. EPSS estimates a 2.19% chance of exploitation in the next 30 days.

Description

The implementations of SAE and EAP-pwd in hostapd and wpa_supplicant 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.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

2.19%

80.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
W1.Fi	Hostapd	>= 2.0, <= 2.8
Fedoraproject	Fedora	30
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.04
Debian	Debian Linux	10.0

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IELLEPIXWQOJFW4SZMU3WQHO63JFAHA4/
https://seclists.org/bugtraq/2019/Sep/56Mailing List, Third Party Advisory
https://usn.ubuntu.com/4098-1/Third Party Advisory
https://w1.fi/cgit/hostap/commit/?id=147bf7b88a9c231322b5b574263071ca6dbb0503Mailing List, Patch, Vendor Advisory
https://w1.fi/cgit/hostap/commit/?id=cd803299ca485eb857e37c88f973fccfbb8600e5Mailing List, Patch, Vendor Advisory
https://www.debian.org/security/2019/dsa-4538Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IELLEPIXWQOJFW4SZMU3WQHO63JFAHA4/
https://seclists.org/bugtraq/2019/Sep/56Mailing List, Third Party Advisory
https://usn.ubuntu.com/4098-1/Third Party Advisory
https://w1.fi/cgit/hostap/commit/?id=147bf7b88a9c231322b5b574263071ca6dbb0503Mailing List, Patch, Vendor Advisory
https://w1.fi/cgit/hostap/commit/?id=cd803299ca485eb857e37c88f973fccfbb8600e5Mailing List, Patch, Vendor Advisory
https://www.debian.org/security/2019/dsa-4538Third Party Advisory

Timeline

Published: Aug 15, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-13377?

How severe is CVE-2019-13377?

CVE-2019-13377 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 2.19% probability of exploitation in the next 30 days.

How do I fix CVE-2019-13377?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-13377?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST