What’s Vulnerable › Vulnerabilities

CVE-2019-11235

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-04-22 · updated 2026-06-17
• Weakness: CWE-345

Description

FreeRADIUS before 3.0.19 mishandles the "each participant verifies that the received scalar is within a range, and that the received group element is a valid point on the curve being used" protection mechanism, aka a "Dragonblood" issue, a similar issue to CVE-2019-9498 and CVE-2019-9499.

Affected products

• Canonical Ubuntu Linux: 18.04, 18.10, 19.04
• Fedoraproject Fedora: all versions
• freeradius: before 3.0.19 — fixed in 3.0.19
• openSUSE Leap: 15.0
• Red Hat Enterprise Linux: 7.0
• RedHat Enterprise Linux Eus: 7.6
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Server Aus: 7.6
• RedHat Enterprise Linux Server Tus: 7.6
• RedHat Enterprise Linux Workstation: 7.0

How to fix

Upgrade to a fixed version: freeradius 3.0.19. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00014.html
• http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00032.html
• http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00033.html
• https://access.redhat.com/errata/RHSA-2019:1131
• https://access.redhat.com/errata/RHSA-2019:1142
• https://bugzilla.redhat.com/show_bug.cgi?id=1695748
• https://freeradius.org/release_notes/?br=3.0.x&re=3.0.19
• https://freeradius.org/security/
• https://papers.mathyvanhoef.com/dragonblood.pdf
• https://usn.ubuntu.com/3954-1/
• https://www.kb.cert.org/vuls/id/871675/
• http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00014.html

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