A coturn security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: coturn-4.5.2-1.fc33

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Fedora Update Notification
FEDORA-2021-dee141fc61
2021-01-20 01:31:19.232083
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Name : coturn
Product : Fedora 33
Version : 4.5.2
Release : 1.fc33
URL :   https://github.com/coturn/coturn/
Summary : TURN/STUN & ICE Server
Description :
The Coturn TURN Server is a VoIP media traffic NAT traversal server and gateway.
It can be used as a general-purpose network traffic TURN server/gateway, too.

This implementation also includes some extra features. Supported RFCs:

TURN specs:
- RFC 5766 - base TURN specs
- RFC 6062 - TCP relaying TURN extension
- RFC 6156 - IPv6 extension for TURN
- Experimental DTLS support as client protocol.

STUN specs:
- RFC 3489 - "classic" STUN
- RFC 5389 - base "new" STUN specs
- RFC 5769 - test vectors for STUN protocol testing
- RFC 5780 - NAT behavior discovery support

The implementation fully supports the following client-to-TURN-server protocols:
- UDP (per RFC 5766)
- TCP (per RFC 5766 and RFC 6062)
- TLS (per RFC 5766 and RFC 6062); TLS1.0/TLS1.1/TLS1.2
- DTLS (experimental non-standard feature)

Supported relay protocols:
- UDP (per RFC 5766)
- TCP (per RFC 6062)

Supported user databases (for user repository, with passwords or keys, if
authentication is required):
- SQLite
- MySQL
- PostgreSQL
- Redis

Redis can also be used for status and statistics storage and notification.

Supported TURN authentication mechanisms:
- long-term
- TURN REST API (a modification of the long-term mechanism, for time-limited
secret-based authentication, for WebRTC applications)

The load balancing can be implemented with the following tools (either one or a
combination of them):
- network load-balancer server
- DNS-based load balancing
- built-in ALTERNATE-SERVER mechanism.

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Update Information:

Coturn 4.5.2 ============ - Fix null pointer dereference in case of out of
memory - Add prometheus metrics - Delete trailing whitespace in example
configuration files - Add architecture ppc64le to travis build - Fix
misleading option in doc (prometheus) - Allow RFC6062 TCP relay data to look
like TLS - Add support for proxy protocol V1 - Print full date and time in
logs - Add new options: "new-log-timestamp" and "new-log-timestamp-format" -
Do not use FIPS and remove hardcode `OPENSSL_VERSION_NUMBER` with LibreSSL -
Add ACME redirect url - Support of `--acme-redirect ` - Fix acme
security, redundancy, consistency - Disable binding request logging to avoid
DoS attacks (Breaking change!) - Add new `--log-binding` option to enable
binding request logging - Fix stale-nonce documentation - Version number is
changed to semver 2.0 - pkg-config, and various cleanups in configure file -
Add systemd notification for better systemd integration - Fix: Null pointer
dereference on tcp_client_input_handler_rfc6062data function - Fix: use-after-
free vulnerability on write_to_peerchannel function - Fix: use-after-free
vulnerability on write_client_connection function - Little refactoring
prometheus - Fix c++ support - Simplify - Remove session
id/allocation labels - Remove per session metrics - Fix CVE-2020-26262
- Fix ipv6 ::1 loopback check - Not allow allocate peer address 0.0.0.0/8
and ::/128 - For more details see the github security advisory:
  https://github.com/coturn/coturn/security/advisories/GHSA-6g6j-r9rf-cm7p
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ChangeLog:

* Mon Jan 11 2021 Robert Scheck - 4.5.2-1
- Upgrade to 4.5.2 (#1914861)
* Sun Sep 27 2020 Christian Glombek - 4.5.1.3-3
- Rebuilt for libevent 2.1.12 soname bump
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References:

[ 1 ] Bug #1915045 - CVE-2020-26262 coturn: Loopback access control bypass
  https://bugzilla.redhat.com/show_bug.cgi?id=1915045
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-dee141fc61' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys