Skip to content
Fencer Intel
medium 6.5

CVE-2019-13456 json

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 1…

published 6y ago modified 4mo ago also EUVD-2019-4929

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

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.

Patch / fix

  • freeradius Debian 14, Debian 13, Debian 12 3.0.20+dfsg-1

debian advisories DEBIAN-CVE-2019-13456

  • freeradius RHEL 7 3.0.13-15.el7
  • freeradius-krb5 RHEL 7 3.0.13-15.el7
  • freeradius-ldap RHEL 7 3.0.13-15.el7
  • freeradius-perl RHEL 7 3.0.13-15.el7
  • freeradius-mysql RHEL 7 3.0.13-15.el7
  • freeradius-utils RHEL 7 3.0.13-15.el7
  • freeradius-python RHEL 7 3.0.13-15.el7
  • freeradius-sqlite RHEL 7 3.0.13-15.el7

red hat advisories RHSA-2020:3984RHSA-2020:1672

  • freeradius-server SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +1 more 3.0.3-17.15.2
  • freeradius-server SLES for SAP 15, SLES 15-LTSS, SLE Module for Server Applications 15 SP1 +2 more 3.0.16-3.6.1
  • freeradius-server SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 3.0.19-3.3.1
  • freeradius-server SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES 12 SP4 +7 more 3.0.15-2.14.1

suse advisories SUSE-SU-2020:2391-1SUSE-SU-2020:1023-1SUSE-SU-2020:1020-1SUSE-SU-2020:1018-1

  • freeradius-server openSUSE Tumbleweed 3.0.23-1.5
  • freeradius-server openSUSE Leap 15.1 3.0.16-lp151.4.4.1

opensuse advisories openSUSE-SU-2024:10767-1openSUSE-SU-2020:0553-1

Is CVE-2019-13456 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-13456 updated cvss 5.3

freeradius: eap-pwd: Information leak due to aborting when needing more than 10 iterations

  • Red Hat Enterprise Linux AppStream (v. 8) freeradius 3.0.17-7.module+el8.2.0+4847+336970e8, freeradius-krb5 3.0.17-7.module+el8.2.0+4847+336970e8, freeradius-ldap 3.0.17-7.module+el8.2.0+4847+336970e8, freeradius-perl 3.0.17-7.module+el8.2.0+4847+336970e8, freeradius-rest 3.0.17-7.module+el8.2.0+4847+336970e8, freeradius-mysql 3.0.17-7.module+el8.2.0+4847+336970e8, +4 more
    fixed: vendor fix RHSA-2020:1672
  • Red Hat Enterprise Linux Server (v. 7) freeradius 3.0.13-15.el7 Red Hat Enterprise Linux Server Optional (v. 7) freeradius-krb5 3.0.13-15.el7, freeradius-ldap 3.0.13-15.el7, freeradius-perl 3.0.13-15.el7, freeradius-mysql 3.0.13-15.el7, freeradius-utils 3.0.13-15.el7, freeradius-python 3.0.13-15.el7, +3 more Red Hat Enterprise Linux Workstation (v. 7) freeradius 3.0.13-15.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) freeradius-krb5 3.0.13-15.el7, freeradius-ldap 3.0.13-15.el7, freeradius-perl 3.0.13-15.el7, freeradius-mysql 3.0.13-15.el7, freeradius-utils 3.0.13-15.el7, freeradius-python 3.0.13-15.el7, +3 more
    fixed: vendor fix RHSA-2020:3984
  • Red Hat Enterprise Linux 5 freeradius, freeradius2 Red Hat Enterprise Linux 6 freeradius, freeradius-krb5, freeradius-ldap, freeradius-perl, freeradius-mysql, freeradius-utils, +3 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.80% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1737663 referenced PoC, tagged "exploit" by a source, unverified
  • wpa3.mathyvanhoef.com https://wpa3.mathyvanhoef.com referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 2.9 AV:A/AC:M/Au:N/C:P/I:N/A:N

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.