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Fedora 44 Coturn 4.9.0 Addresses Critical IPv4-IPv6 Bypass Issues Fixed

Coturn 4.9.0 Multiple security fixes Fix to Web Admin password check Cleanup of deprecated OpenSSL APIs Fix for CVE-2026-27624: Bypass localhost and IP range block using IPv4-mapped. -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2026-379e214a37 2026-03-07 00:17:58.502288+00:00 -------------------------------------------------------------------------------- Name : coturn Product : Fedora 44 Version : 4.9.0 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 combinationof them): - network load-balancer server - DNS-based load balancing - built-in ALTERNATE-SERVER mechanism. -------------------------------------------------------------------------------- Update Information: Coturn 4.9.0 Multiple security fixes Fix to Web Admin password check Cleanup of deprecated OpenSSL APIs Fix for CVE-2026-27624: Bypass localhost and IP range block using IPv4-mapped IPv6 -------------------------------------------------------------------------------- ChangeLog: * Wed Feb 25 2026 Robert Scheck - 4.9.0-1 - Upgrade to 4.9.0 (#2442144) - Add patch to build successfully using OpenSSL 1.1.1 on RHEL 8 -------------------------------------------------------------------------------- References: [ 1 ] Bug #2442550 - CVE-2026-27624 coturn: IPv4-mapped IPv6 bypasses denied-peer-ip ACL https://bugzilla.redhat.com/show_bug.cgi?id=2442550 -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-379e214a37' 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 -------------------------------------------------------------------------------- -- _______________________________________________ package-announce mailing list -- This email address is being protected from spambots. You need JavaScript enabled to view it. To unsubscribe send an email to This email address is being protected from spambots. You need JavaScript enabled to view it. Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/This email address is being protected from spambots. You need JavaScript enabled to view it. Do not reply to spam, report it:https://forge.fedoraproject.org/infra/tickets/issues/new . Explore critical security updates for Coturn 4.9.0 addressing bypass issues and OpenSSL API cleanup.. Coturn security updates, Fedora security, OpenSSL fix, NAT traversal, server updates. . Severity: Important. LinuxSecurity.com Team

Mar 07, 2026 •Important Fedora