CVE-2019-17185
freeradius: eap-pwd: DoS issues due to multithreaded BN_CTX access
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In FreeRADIUS 3.0.x before 3.0.20, the EAP-pwd module used a global OpenSSL BN_CTX instance to handle all handshakes. This mean multiple threads use the same BN_CTX instance concurrently, resulting in crashes when concurrent EAP-pwd handshakes are initiated. This can be abused by an adversary as a Denial-of-Service (DoS) attack.
En FreeRADIUS versiones 3.0.x anteriores a 3.0.20, el módulo EAP-pwd utilizó una instancia OpenSSL BN_CTX global para manejar todos los protocolos de enlace. Esto significa que varios subprocesos utilizan la misma instancia de BN_CTX simultáneamente, resultando en bloqueos cuando los protocolos de enlace EAP-pwd son iniciados. Esto puede ser abusado por un adversario como un ataque de Denegación de Servicio (DoS).
It was discovered that FreeRADIUS incorrectly handled multiple EAP-pwd handshakes. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS. Shane Guan discovered that FreeRADIUS incorrectly handled memory when checking unknown SIM option sent by EAP-SIM supplicant. An attacker could possibly use this issue to cause a denial of service on the server. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2019-10-04 CVE Reserved
- 2020-03-21 CVE Published
- 2024-08-05 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-567: Unsynchronized Access to Shared Data in a Multithreaded Context
- CWE-662: Improper Synchronization
CAPEC
References (5)
| URL | Tag | Source |
|---|---|---|
| https://github.com/FreeRADIUS/freeradius-server/releases/tag/release_3_0_20 | Release Notes |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.html | 2022-04-22 | |
| https://freeradius.org/security | 2022-04-22 | |
| https://access.redhat.com/security/cve/CVE-2019-17185 | 2020-11-04 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1816680 | 2020-11-04 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Freeradius Search vendor "Freeradius" | Freeradius Search vendor "Freeradius" for product "Freeradius" | >= 3.0.0 < 3.0.20 Search vendor "Freeradius" for product "Freeradius" and version " >= 3.0.0 < 3.0.20" | - |
Affected
| ||||||
| Opensuse Search vendor "Opensuse" | Leap Search vendor "Opensuse" for product "Leap" | 15.1 Search vendor "Opensuse" for product "Leap" and version "15.1" | - |
Affected
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