Hírolvasó

OpenSSH 10.0 released

5 hónap 1 hét óta

OpenSSH 10.0 has been released. Support for the DSA signature algorithm, which was disabled by default beginning in 2015, has been removed. Other notable changes include using the post-quantum algorithm mlkem768x25519-sha256 for key agreement by default, support for systemd-style socket activation in Portable OpenSSH, and moving code for user authentication from the sshd-session binary to the new ssh-auth binary:

Splitting this code into a separate binary ensures that the crucial pre-authentication attack surface has an entirely disjoint address space from the code used for the rest of the connection. It also yields a small runtime memory saving as the authentication code will be unloaded after the authentication phase completes. This change should be largely invisible to users, though some log messages may now come from "sshd-auth" instead of "sshd-session". Downstream distributors of OpenSSH will need to package the sshd-auth binary.

The release notes also warn that "software that naively matches versions using patterns like "OpenSSH_1*"" may be confused by the new version number.

jzb

Security updates for Wednesday

5 hónap 1 hét óta
Security updates have been issued by Debian (lemonldap-ng, libbssolv-perl, and phpmyadmin), Fedora (augeas, mariadb10.11, and thunderbird), Oracle (gimp, libxslt, python3.11, python3.12, tomcat, and xorg-x11-server), Red Hat (expat, grafana, opentelemetry-collector, and webkit2gtk3), SUSE (azure-cli-core, doomsday, kernel, and poppler), and Ubuntu (dotnet8, dotnet9, erlang, and poppler).
jzb

FreeDOS 1.4 released

5 hónap 1 hét óta

Version 1.4 of FreeDOS has been released. This is the first stable release since 2022, and includes improvements to the Fdisk hard-disk-management program, and reliability updates for the mTCP set of TCP/IP applications for DOS.

This version was much smoother because Jerome Shidel, our distribution manager, had an idea after FreeDOS 1.3 that we could have a rolling test release that collected all of the changes that people make over time. Previous to this, each new FreeDOS distribution (like 1.0, 1.1, 1.2, and 1.3) required bundling up packages into a "release candidate," and we would go through several iterations of updating the release candidates.

Jerome's method of building the FreeDOS distribution made it easier to automate a test release, which we decided to update every month. As the test releases accumulated enough changes to warrant a release, we could then make the next test release a "release candidate" which would iterate to the next version of the FreeDOS distribution. Since 2022, we've released monthly test releases. Thanks Jerome!

LWN covered FreeDOS last year for its 30th anniversary.

jzb

[$] Taking notes with Joplin

5 hónap 1 hét óta

Joplin is an open-source note-taking application designed to handle taking many kinds of notes, whether it is managing code snippets, writing documentation, jotting down lecture notes, or drafting a novel. Joplin has Markdown support, a plugin system for extensibility, and accepts multimedia content, allowing users to attach images, videos, and audio files to their notes. It can provide synchronization of content across devices using end-to-end encryption, or users can opt to stick to local storage only. Joplin even offers a command-line version for terminal-based usage. Joplin 3.2, the most recent feature release, brought long-awaited multi-window support, multi-column layouts, enhanced accessibility, and theme detection.

jzb

[$] Using large folios for text areas

5 hónap 1 hét óta
Quite a bit of work has been done in recent years to allow the kernel to make more use of large folios. That progress has not yet reached the handling of text (executable code) areas, though. During the memory-management track of the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit, Ryan Roberts ran a session on how that situation might be improved. It would be a relatively small and contained operation, but can give a measurable performance improvement.
corbet

[$] Per-CPU memory for user space

5 hónap 1 hét óta
The kernel makes extensive use of per-CPU data as a way to avoid contention between processors and improve scalability. Using the same technique in user space is harder, though, since there is little control over which CPU a process may be running on at any given time. That hasn't stopped Mathieu Desnoyers from trying, though; in the memory-management track of the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit, he presented a proposal for how user-space per-CPU memory could work.
corbet

Security updates for Tuesday

5 hónap 1 hét óta
Security updates have been issued by AlmaLinux (gimp, libxslt, python3.11, python3.12, and tomcat), Debian (ghostscript and libnet-easytcp-perl), Fedora (openvpn, perl-Data-Entropy, and webkitgtk), Red Hat (python-jinja2), SUSE (giflib, pam, and xen), and Ubuntu (apache2, binutils, expat, fis-gtm, linux-azure, linux-azure-6.8, linux-nvidia-lowlatency, linux-azure, linux-azure-fde, linux-azure-5.15, linux-azure-fde-5.15, linux-azure-fips, linux-gcp-fips, linux-hwe-5.4, linux-nvidia, linux-nvidia-tegra-igx, ruby2.7, ruby3.0, ruby3.2, ruby3.3, and vim).
corbet

New sysctl(8) -f option supports reading entire settings file in one go

5 hónap 1 hét óta
If you have ever been irked by having to enter a sequence of sysctl(8) commands to achieve things like enabling forwarding for IPv4 and IPv6 both, help is at hand.

In a recent commit, Klemens Nanni (kn@) added functionality to have the classic command read multiple settings from a file:

Subject: CVS: cvs.openbsd.org: src From: Klemens Nanni <kn () cvs ! openbsd ! org> Date: 2025-04-05 14:09:06 Message-ID: f3c322a675a4cd33 () cvs ! openbsd ! org [Download RAW message or body] CVSROOT: /cvs Module name: src Changes by: kn@cvs.openbsd.org 2025/04/05 08:09:06 Modified files: sbin/sysctl : sysctl.8 sysctl.c Log message: Add [-f file] to apply sysctl.conf in one go

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