Bug 1816680 (CVE-2019-17185)

Summary: CVE-2019-17185 freeradius: eap-pwd: DoS issues due to multithreaded BN_CTX access
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: ascheel, dpal, fdvorak, lemenkov, nikolai.kondrashov, nkinder, pkis, rharwood
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: freeradius-server 3.0.20 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-09-29 22:00:18 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1816681, 1818808, 1818809, 1818810    
Bug Blocks: 1816682    

Description Guilherme de Almeida Suckevicz 2020-03-24 14:20:41 UTC 
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.

Reference:
https://github.com/FreeRADIUS/freeradius-server/releases/tag/release_3_0_20
Comment 1 Guilherme de Almeida Suckevicz 2020-03-24 14:21:18 UTC 
Created freeradius tracking bugs for this issue:

Affects: fedora-all [bug 1816681]
Comment 2 Cedric Buissart 2020-03-30 08:32:18 UTC 
Upstream fix :
https://github.com/FreeRADIUS/freeradius-server/commit/6b522f8780813726799e6b8cf0f1f8e0ce2c8ebf
Comment 3 Cedric Buissart 2020-03-30 12:42:38 UTC 
Freeradius versions 2.x and older are not vulnerable, because they do not support the eap-pwd module.
Comment 5 errata-xmlrpc 2020-09-29 20:20:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:3984 https://access.redhat.com/errata/RHSA-2020:3984
Comment 6 Product Security DevOps Team 2020-09-29 22:00:18 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-17185
Comment 7 errata-xmlrpc 2020-11-04 03:58:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4799 https://access.redhat.com/errata/RHSA-2020:4799