CVE-2017-9148
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.
Find out more about CVE-2017-9148 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS v3 metrics
| CVSS3 Base Score | 7.4 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | None |
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 7 (freeradius) | RHSA-2017:1581 | 2017-06-28 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 6 | freeradius | Not affected |
| Red Hat Enterprise Linux 5 | freeradius2 | Not affected |
| Red Hat Enterprise Linux 5 | freeradius | Not affected |
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.