CVE-2019-10064

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-02-28 · updated 2026-06-17
Weakness: CWE-331

Description

hostapd before 2.6, in EAP mode, makes calls to the rand() and random() standard library functions without any preceding srand() or srandom() call, which results in inappropriate use of deterministic values. This was fixed in conjunction with CVE-2016-10743.

Affected products

Debian Linux: 8.0, 9.0
w1.fi hostapd: before 2.6 — fixed in 2.6

How to fix

Upgrade to a fixed version: w1.fi hostapd 2.6. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/156573/Hostapd-Insufficient-Entropy.html
http://seclists.org/fulldisclosure/2020/Feb/26
http://www.openwall.com/lists/oss-security/2020/02/27/1
http://www.openwall.com/lists/oss-security/2020/02/27/1
http://www.openwall.com/lists/oss-security/2020/02/27/1
http://www.openwall.com/lists/oss-security/2020/02/27/1
http://www.openwall.com/lists/oss-security/2020/02/27/2
https://lists.debian.org/debian-lts-announce/2020/03/msg00010.html
https://lists.debian.org/debian-lts-announce/2020/08/msg00013.html
https://w1.fi/cgit/hostap/commit/?id=98a516eae8260e6fd5c48ddecf8d006285da7389
http://packetstormsecurity.com/files/156573/Hostapd-Insufficient-Entropy.html
http://seclists.org/fulldisclosure/2020/Feb/26

Get alerted when CVE-2019-10064 or the next vulnerability affects your stack