CVE-2019-11234 — FreeRADIUS before 3

FreeRADIUS before 3.0.19 does not prevent use of reflection for authentication spoofing, aka a "Dragonblood" issue, a similar issue to CVE-2019-9497.

01What is this vulnerability?

FreeRADIUS before 3.0.19 does not prevent use of reflection for authentication spoofing, aka a "Dragonblood" issue, a similar issue to CVE-2019-9497.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

08Timeline

• Published: 2019-04-21T16:36:48.000Z
• Last modified: 2024-08-04T22:48:08.954Z

09References

• freeradius.org — https://freeradius.org/release_notes/?br=3.0.x&re=3.0.19
• papers.mathyvanhoef.com — https://papers.mathyvanhoef.com/dragonblood.pdf
• www.kb.cert.org — https://www.kb.cert.org/vuls/id/871675/
• freeradius.org — https://freeradius.org/security/
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=1695783
• usn.ubuntu.com — https://usn.ubuntu.com/3954-1/
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00014.html
• access.redhat.com — https://access.redhat.com/errata/RHSA-2019:1131
• access.redhat.com — https://access.redhat.com/errata/RHSA-2019:1142
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00032.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00033.html