CVE-2019-13456

Name: CVE-2019-13456
Creator: NVD / NIST
Published: 2019-12-03T20:15:11.013+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.63%

Last modified Jun 17, 2026

CVE-2019-13456 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. In FreeRADIUS 3.0 through 3.0.19, on average 1 in every 2048 EAP-pwd handshakes fails because the password element cannot be found within 10 iterations of the hunting and pecking loop. This leaks information that an attacker can use to recover the password of any user. EPSS estimates a 1.63% chance of exploitation in the next 30 days.

Description

In FreeRADIUS 3.0 through 3.0.19, on average 1 in every 2048 EAP-pwd handshakes fails because the password element cannot be found within 10 iterations of the hunting and pecking loop. This leaks information that an attacker can use to recover the password of any user. This information leakage is similar to the "Dragonblood" attack and CVE-2019-9494.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.63%

73.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
Freeradius	Freeradius	>= 3.0.0, <= 3.0.19
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0
Opensuse	Leap	15.1

References

http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1737663Exploit, Issue Tracking, Patch, Third Party Advisory
https://freeradius.org/security/Vendor Advisory
https://github.com/FreeRADIUS/freeradius-server/commit/3ea2a5a026e73d81cd9a3e9bbd4300c433004bfaPatch, Third Party Advisory
https://wpa3.mathyvanhoef.comExploit, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1737663Exploit, Issue Tracking, Patch, Third Party Advisory
https://freeradius.org/security/Vendor Advisory
https://github.com/FreeRADIUS/freeradius-server/commit/3ea2a5a026e73d81cd9a3e9bbd4300c433004bfaPatch, Third Party Advisory
https://wpa3.mathyvanhoef.comExploit, Third Party Advisory

Timeline

Published: Dec 3, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-13456?

How severe is CVE-2019-13456?

CVE-2019-13456 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.63% probability of exploitation in the next 30 days.

How do I fix CVE-2019-13456?

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-2019-13456?

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

Scan your code now

Source: NVD / NIST