Bug 1852362 (CVE-2020-4067) - CVE-2020-4067 coturn: STUN response buffer not initialized properly
Summary: CVE-2020-4067 coturn: STUN response buffer not initialized properly
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-4067
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-06-30 09:15 UTC by Robert Scheck
Modified: 2020-10-14 19:28 UTC (History)
2 users (show)

Fixed In Version: coturn-4.5.1.3
Clone Of:
Environment:
Last Closed: 2020-06-30 09:20:33 UTC
Embargoed:

Attachments (Terms of Use)

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
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