CVE-2019-13377

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-08-15 · updated 2026-06-17
Weakness: CWE-203

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.

Affected products

Canonical Ubuntu Linux: 18.04, 19.04
Debian Linux: 10.0
Fedoraproject Fedora: 30
w1.fi hostapd: from 2.0 through 2.8

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IELLEPIXWQOJFW4SZMU3WQHO63JFAHA4/
https://seclists.org/bugtraq/2019/Sep/56
https://usn.ubuntu.com/4098-1/
https://w1.fi/cgit/hostap/commit/?id=147bf7b88a9c231322b5b574263071ca6dbb0503
https://w1.fi/cgit/hostap/commit/?id=cd803299ca485eb857e37c88f973fccfbb8600e5
https://www.debian.org/security/2019/dsa-4538
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IELLEPIXWQOJFW4SZMU3WQHO63JFAHA4/
https://seclists.org/bugtraq/2019/Sep/56
https://usn.ubuntu.com/4098-1/
https://w1.fi/cgit/hostap/commit/?id=147bf7b88a9c231322b5b574263071ca6dbb0503
https://w1.fi/cgit/hostap/commit/?id=cd803299ca485eb857e37c88f973fccfbb8600e5
https://www.debian.org/security/2019/dsa-4538

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