Bug 1852362 (CVE-2020-4067)

Summary: CVE-2020-4067 coturn: STUN response buffer not initialized properly
Product: [Other] Security Response Reporter: Robert Scheck <redhat-bugzilla>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: cglombek, redhat-bugzilla
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: coturn-4.5.1.3 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-06-30 09:20:33 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Robert Scheck 2020-06-30 09:15:45 UTC 
In coturn before version 4.5.1.3, there is an issue whereby STUN/TURN response buffer is not initialized properly. There is a leak of information between different client connections. One client (an attacker) could use their connection to intelligently query coturn to get interesting bytes in the padding bytes from the connection of another client. This has been fixed in 4.5.1.3.

See also:

 - https://github.com/coturn/coturn/issues/583
 - https://nvd.nist.gov/vuln/detail/CVE-2020-4067
Comment 1 Robert Scheck 2020-06-30 09:20:33 UTC 
Addressed on all active branches of Fedora and EPEL via:

 - https://bodhi.fedoraproject.org/updates/FEDORA-2020-21dbf4f78b
 - https://bodhi.fedoraproject.org/updates/FEDORA-2020-d946f64eea
 - https://bodhi.fedoraproject.org/updates/FEDORA-2020-9eadf517de
 - https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-8e909a0e81
 - https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-afd5c42fd6