CVE-2019-17185
First published: Sat Mar 21 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/freeradius-server | <3.0.20 | 3.0.20 |
| FreeRADIUS | >=3.0.0<3.0.20 | |
| SUSE Linux | =15.1 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.html
- https://freeradius.org/security/
- https://github.com/FreeRADIUS/freeradius-server/releases/tag/release_3_0_20
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1816681
- https://github.com/FreeRADIUS/freeradius-server/commit/6b522f8780813726799e6b8cf0f1f8e0ce2c8ebf
- https://access.redhat.com/errata/RHSA-2020:3984
- https://access.redhat.com/security/cve/cve-2019-17185
- https://access.redhat.com/errata/RHSA-2020:4799
- https://bugzilla.redhat.com/show_bug.cgi?id=1816680
Frequently Asked Questions
What is the severity of CVE-2019-17185?
CVE-2019-17185 is rated as high severity due to its potential for denial of service attacks.
How do I fix CVE-2019-17185?
To fix CVE-2019-17185, upgrade FreeRADIUS to version 3.0.20 or later.
What versions of FreeRADIUS are affected by CVE-2019-17185?
FreeRADIUS versions prior to 3.0.20 are affected by CVE-2019-17185.
Can CVE-2019-17185 be exploited remotely?
Yes, CVE-2019-17185 can be exploited remotely if an attacker initiates concurrent EAP-pwd handshakes.
What is the main impact of CVE-2019-17185?
The main impact of CVE-2019-17185 is that it can lead to service crashes due to concurrent handshake handling.
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