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Fencer Vulns
high 7.5

CVE-2019-17185 json

In FreeRADIUS 3.0.x before 3.0.20, the EAP-pwd module used a global OpenSSL BN_CTX instance to handle all handshakes.

published 2020-03-21 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-7617

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

In FreeRADIUS 3.0.x before 3.0.20, the EAP-pwd module used a global OpenSSL BN_CTX instance to handle all handshakes. This mean multiple threads use the same BN_CTX instance concurrently, resulting in crashes when concurrent EAP-pwd handshakes are initiated. This can be abused by an adversary as a Denial-of-Service (DoS) attack.

Patch / fix

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

debian advisories DEBIAN-CVE-2019-17185

  • freeradius Ubuntu 18.04 LTS 3.0.16+dfsg-1ubuntu3.2

ubuntu advisories UBUNTU-CVE-2019-17185

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • freeradius RHEL 8 3.0.20-3.module+el8.3.0+7597+67902674
  • freeradius-krb5 RHEL 8 3.0.20-3.module+el8.3.0+7597+67902674
  • freeradius-ldap RHEL 8 3.0.20-3.module+el8.3.0+7597+67902674
  • freeradius-perl RHEL 8 3.0.20-3.module+el8.3.0+7597+67902674
  • freeradius-rest RHEL 8 3.0.20-3.module+el8.3.0+7597+67902674
  • freeradius-mysql RHEL 8 3.0.20-3.module+el8.3.0+7597+67902674
  • freeradius-utils RHEL 8 3.0.20-3.module+el8.3.0+7597+67902674
  • freeradius-sqlite RHEL 8 3.0.20-3.module+el8.3.0+7597+67902674

red hat advisories RHSA-2020:4799RHSA-2020:3984

  • 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

  • freeradius Rocky Linux 8 3.0.20-3.module+el8.4.0+576+2d493411

rocky linux advisories RLSA-2020:4799

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-2019-17185 updated cvss 7.5

freeradius: eap-pwd: DoS issues due to multithreaded BN_CTX access

  • Red Hat Enterprise Linux AppStream (v. 8) freeradius 3.0.20-3.module+el8.3.0+7597+67902674, freeradius-krb5 3.0.20-3.module+el8.3.0+7597+67902674, freeradius-ldap 3.0.20-3.module+el8.3.0+7597+67902674, freeradius-perl 3.0.20-3.module+el8.3.0+7597+67902674, freeradius-rest 3.0.20-3.module+el8.3.0+7597+67902674, freeradius-mysql 3.0.20-3.module+el8.3.0+7597+67902674, +5 more
    fixed: vendor fix RHSA-2020:4799
  • 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

2.22% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns 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.