-------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2026-8856c5be6f 2026-08-02 00:53:39.370641+00:00 --------------------------------------------------------------------------------
Name : coturn Product : Fedora 44 Version : 4.15.0 Release : 1.fc44 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.
-------------------------------------------------------------------------------- Update Information:
Coturn 4.15.0 Security Ignore STUN attributes after MESSAGE-INTEGRITY (GHSA-5538-7cxj-5jcc). Per RFC 8489 §9 / RFC 5389 §15.4, attributes following MESSAGE-INTEGRITY (other than FINGERPRINT) must be ignored, but coturn processed the full attribute list. This also fixes an interop bug where an RFC 8489 client sending MESSAGE-INTEGRITY- SHA256 after MESSAGE-INTEGRITY was wrongly answered with error 420. Bind mobility session-resume to the original allocation owner — a MOBILITY- TICKET resume is now only accepted from the user that created the allocation. Reject ACME requests via signed 400 response instead of silently dropping them. Reset the reused UDP receive-buffer offset in the DTLS listener. Zeroed channel-data padding in stun_init_channel_message_str so uninitialized stack bytes never reach the wire. Fixed a uint16_t truncation overflow when computing STUN message length. Fixed an off-by-one write past the realm buffer in redis_list_admin_users. Fixed a size_t underflow in the telnet (CLI) _process data emit and bounded MSSP subnegotiation parsing to the buffer end. NULL-terminated the HTTP request buffer before it is logged verbatim; switched apputils.c to bounded snprintf. New features RFC 8016 graceful dual-5-tuple mobility handoff. A MOBILITY-TICKET resume no longer hard-switches the allocation at REFRESH time. The server now does a make- before-break transition: peer→client traffic stays on the old 5-tuple until the client's first packet arrives on the new one, and only then is the old socket discarded. --drain-min-allocations — a shutdown threshold for drain mode: the server exits once the live allocation count falls to the configured value instead of waiting for zero. --log-min-level (log_min_level in the config file) — a real minimum-log-level filter, since -v/--verbose had little effect on turnserver logging. Alternate-server TCP/UDP distinction — alternate servers are now tracked per transport, so TCP and UDP clients can be redirected to different alternate servers. Fail-fast allocation wrappers — all heap allocation in coturn-owned code goes through turn_malloc/turn_calloc/turn_realloc/turn_strdup, which log the call site and abort on OOM rather than risking NULL-dereference or silent degradation in a long-running server. Reliability and correctness fixes Fixed the remaining misaligned wire-buffer accesses and added alignment-safe turn_read_u16/u32/u64 / turn_write_* helpers — misaligned reads of STUN attribute values were undefined behavior and a SIGBUS on strict-alignment targets. Fixed uint32_t counter wraparound in the relay port allocator. Worker threads are now joined on shutdown, fixing an exit-time OpenSSL race; OpenSSL atexit cleanup is disabled in turnserver. Released the alternate-server list mutex when del_alt_server removes the last entry, fixing a deadlock. setgroups is no longer called unconditionally in mainrelay, fixing startup under environments where it's not permitted. Freed EVP_CIPHER_CTX on error paths in the OAuth GCM encode/decode and avoided leaks on realloc failure in TCP relay allocation. Cast to unsigned char before isspace() in config-file parsing. Log an explicit error when a configured tls-listening-port cannot start. Autotools build now detects hiredis_ssl, enabling Redis TLS in the ./configure build. Metrics Every STUN Binding response is now counted in the Prometheus metrics. Client utilities turnutils_uclient now sends the SNI host name on TLS connections. heap-allocates its STUN message buffers instead of using large stack buffers. -------------------------------------------------------------------------------- ChangeLog:
* Fri Jul 24 2026 Robert Scheck robert@fedoraproject.org - 4.15.0-1 - Upgrade to 4.15.0 (#2506022) * Wed Jul 15 2026 Fedora Release Engineering releng@fedoraproject.org - 4.14.0-3 - Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild -------------------------------------------------------------------------------- References:
[ 1 ] Bug #2506022 - coturn-4.15.0 is available https://bugzilla.redhat.com/show_bug.cgi?id=2506022 --------------------------------------------------------------------------------
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-8856c5be6f' 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
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