CVE-2017-9148
freeradius: TLS resumption authentication bypass
Severity
ImportantRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · May 8, 2017
Updated · May 13, 2026
Description
An authentication bypass flaw was found in the way the EAP module in FreeRADIUS handled TLS session resumption. A remote unauthenticated attacker could potentially use this flaw to bypass the inner authentication check in FreeRADIUS by resuming an older unauthenticated TLS session.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
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.
CVSS / CWE
CVSS 3.0 · 7.4CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-287 · Improper Authentication