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Fencer Intel
critical 9.8

CVE-2017-9148 json

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…

published 2017-05-29 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-18086

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.9%
EPSS 3.9% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

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.

Patch / fix

  • freeradius Debian 14, Debian 13, Debian 12 3.0.12+dfsg-5

debian advisories DEBIAN-CVE-2017-9148

  • freeradius RHEL 7 3.0.4-8.el7_3
  • freeradius-krb5 RHEL 7 3.0.4-8.el7_3
  • freeradius-ldap RHEL 7 3.0.4-8.el7_3
  • freeradius-perl RHEL 7 3.0.4-8.el7_3
  • freeradius-mysql RHEL 7 3.0.4-8.el7_3
  • freeradius-utils RHEL 7 3.0.4-8.el7_3
  • freeradius-python RHEL 7 3.0.4-8.el7_3
  • freeradius-sqlite RHEL 7 3.0.4-8.el7_3

red hat advisories RHSA-2017:1581

  • freeradius-server SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 2.1.1-7.24.1
  • freeradius-server SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 3.0.3-17.4.1

suse advisories SUSE-SU-2017:1777-1SUSE-SU-2017:1705-1

  • freeradius-server openSUSE Tumbleweed 3.0.23-1.5

opensuse advisories openSUSE-SU-2024:10767-1

  • freeradius Arch Linux 3.0.14-3

arch linux advisories AVG-281

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-2017-9148 updated cvss 7.4

freeradius: TLS resumption authentication bypass

  • Red Hat Enterprise Linux Server (v. 7) freeradius 3.0.4-8.el7_3 Red Hat Enterprise Linux Server Optional (v. 7) freeradius-krb5 3.0.4-8.el7_3, freeradius-ldap 3.0.4-8.el7_3, freeradius-perl 3.0.4-8.el7_3, freeradius-mysql 3.0.4-8.el7_3, freeradius-utils 3.0.4-8.el7_3, freeradius-python 3.0.4-8.el7_3, +3 more Red Hat Enterprise Linux Workstation (v. 7) freeradius 3.0.4-8.el7_3 Red Hat Enterprise Linux Workstation Optional (v. 7) freeradius-krb5 3.0.4-8.el7_3, freeradius-ldap 3.0.4-8.el7_3, freeradius-perl 3.0.4-8.el7_3, freeradius-mysql 3.0.4-8.el7_3, freeradius-utils 3.0.4-8.el7_3, freeradius-python 3.0.4-8.el7_3, +3 more
    fixed: vendor fix “Disable TLS session caching in FreeRADIUS by setting "enable = no" in the cache subsection of EAP module settings, which are in /etc/raddb/mods-available/eap file.” RHSA-2017:1581
  • 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

3.91% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

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.