Stay Secure with the Latest Linux Advisories

security advisoryFedoranginx

Fedora 40: FEDORA-2025-016ed44ddc critical: nginx SSL session bypass

Changes with nginx 1.26.3 05 Feb 2025 *) Security: insufficient check in virtual servers handling with TLSv1.3 SNI allowed to reuse SSL sessions in a different virtual server, to bypass client SSL certificates verification (CVE-2025-23419). *) Bugfix: in the ngx_http_mp4_module.. -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2025-016ed44ddc 2025-02-15 02:22:06.812098+00:00 -------------------------------------------------------------------------------- Name : nginx Product : Fedora 40 Version : 1.26.3 Release : 1.fc40 URL : https://nginx.org Summary : A high performance web server and reverse proxy server Description : Nginx is a web server and a reverse proxy server for HTTP, SMTP, POP3 and IMAP protocols, with a strong focus on high concurrency, performance and low memory usage. -------------------------------------------------------------------------------- Update Information: Changes with nginx 1.26.3 05 Feb 2025 *) Security: insufficient check in virtual servers handling with TLSv1.3 SNI allowed to reuse SSL sessions in a different virtual server, to bypass client SSL certificates verification (CVE-2025-23419). *) Bugfix: in the ngx_http_mp4_module. Thanks to Nils Bars. *) Workaround: "gzip filter failed to use preallocated memory" alerts appeared in logs when using zlib-ng. *) Bugfix: nginx could not build libatomic library using the library sources if the --with-libatomic=DIR option was used. *) Bugfix: nginx now ignores QUIC version negotiation packets from clients. *) Bugfix: nginx could not be built on Solaris 10 and earlier with the ngx_http_v3_module. *) Bugfixes in HTTP/3. -------------------------------------------------------------------------------- ChangeLog: * Thu Feb 6 2025 Felix Kaechele - 2:1.26.3-1 - update to 1.26.3 - fixes SSL session reuse vulnerability (CVE-2025-23419) - drop zlib-ng patch, theissue was addressed upstream * Wed Feb 5 2025 Luboš Uhliarik - 2:1.26.2-6 - Use systemd-sysusers * Mon Feb 3 2025 Joe Orton - 2:1.26.2-5 - Add systemd instantiated service nginx@.service, allowing e.g. "systemctl start This email address is being protected from spambots. You need JavaScript enabled to view it." to start an instance of nginx using /etc/nginx/foobar.conf as the configuration. * Sat Feb 1 2025 Björn Esser - 2:1.26.2-4 - Add explicit BR: libxcrypt-devel * Sat Feb 1 2025 Felix Kaechele - 2:1.26.2-3 - Add zlib-ng patch to fix rhbz#2343318 * Fri Jan 17 2025 Fedora Release Engineering - 2:1.26.2-2 - Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild -------------------------------------------------------------------------------- References: [ 1 ] Bug #2277663 - please switch to using systemd-sysusers to create the nginx user https://bugzilla.redhat.com/show_bug.cgi?id=2277663 [ 2 ] Bug #2344197 - CVE-2025-23419 nginx: TLS Session Resumption Vulnerability [fedora-40] https://bugzilla.redhat.com/show_bug.cgi?id=2344197 -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-016ed44ddc' 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 -------------------------------------------------------------------------------- . A security patch for nginx on Fedora 40 resolves problems related to SSL session validation stemming from inadequate verification procedures.. nginx updates,Fedora security,SSL session issues,TLS vulnerabilities,web server security. . Severity: Critical. LinuxSecurity.com Team

Feb 15, 2025 •Critical Fedora