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Fedora 41: FEDORA-2025-18cb3f852d critical: OpenSSH Match Directive Issue

Fix regression of Match directive processing. -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2025-18cb3f852d 2025-02-20 02:26:22.548385+00:00 -------------------------------------------------------------------------------- Name : openssh Product : Fedora 41 Version : 9.9p1 Release : 3.fc41 URL : https://www.openssh.org/portable.html Summary : An open source implementation of SSH protocol version 2 Description : SSH (Secure SHell) is a program for logging into and executing commands on a remote machine. SSH is intended to replace rlogin and rsh, and to provide secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP/IP ports can also be forwarded over the secure channel. OpenSSH is OpenBSD's version of the last free version of SSH, bringing it up to date in terms of security and features. This package includes the core files necessary for both the OpenSSH client and server. To make this package useful, you should also install openssh-clients, openssh-server, or both. -------------------------------------------------------------------------------- Update Information: Fix regression of Match directive processing -------------------------------------------------------------------------------- ChangeLog: * Tue Feb 18 2025 Dmitry Belyavskiy - 9.9p1-3 - Fix regression of Match directive processing - Fix missing error codes set and invalid error code checks in OpenSSH. It prevents memory exhaustion attack and a MITM attack when VerifyHostKeyDNS is on (CVE-2025-26465, CVE-2025-26466). -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-18cb3f852d' at the command line. For more information, refer to the dnf documentation availableat 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/security/ -------------------------------------------------------------------------------- -- _______________________________________________ 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: . Recent updates on the OpenSSH security advisory for Fedora 41 address match directive vulnerabilities, enhancing security and mitigating risks from misconfigurations. Fedora 41 OpenSSH, security advisory, match processing regression. . Severity: Critical. LinuxSecurity.com Team

Feb 20, 2025 •Critical Fedora