Description
The TLS session cache in FreeRADIUS 2.1.1 through 2.1.7, 3.0.x before 3.0.14, 3.1.x before 2017-02-04, and 4.0.x before 2017-02-04 fails to reliably prevent resumption of an unauthenticated session, which allows remote attackers (such as malicious 802.1X supplicants) to bypass authentication via PEAP or TTLS.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | freeradius | 3.0.12+dfsg-5 | — |
| Debian 13 | freeradius | 3.0.12+dfsg-5 | — |
| Debian 12 | freeradius | 3.0.12+dfsg-5 | — |
| Debian 7 | freeradius | 2.1.12+dfsg-1.2+deb7u1 | DLA-977-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | freeradius +11 | 3.0.4-8.el7_3 | RHSA-2017:1581 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | freeradius-server | 3.0.3-17.4.1 | SUSE-SU-2017:1705-1 |
| SLES 11 SP4 | freeradius-server | 2.1.1-7.24.1 | SUSE-SU-2017:1777-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | freeradius-server | 3.0.3-17.4.1 | SUSE-SU-2017:1705-1 |
| SLES for SAP 11 SP4 | freeradius-server | 2.1.1-7.24.1 | SUSE-SU-2017:1777-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | freeradius-server | 3.0.23-1.5 | openSUSE-SU-2024:10767-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | freeradius +11 | 3.0.4-8.el7_3 | ELSA-2017-1581 |
Advisories 6
- RHSA-2017:1581 Red Hat Security Advisory: freeradius security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DLA-977-1 freeradius - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10767-1 freeradius-server-3.0.23-1.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1777-1 Security update for freeradius-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1705-1 Security update for freeradius-server SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2017-1581 Important: freeradius security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 28, 2017
References
- http://freeradius.org/security.html
- http://seclists.org/oss-sec/2017/q2/422
- RHSA-2017:1581 vendor-advisory
- 1038576 vdb-entry
- 98734 vdb-entry
- GLSA-201706-27 vendor-advisory