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THE ART OF LINUX


SIMPLE. FAST. SYSTEMD-FREE.


ARTIX LINUX IS A ROLLING-RELEASE DISTRIBUTION, BASED ON ARCH LINUX.

IT USES REAL INIT SYSTEMS, BECAUSE PID1 MUST BE SIMPLE, SECURE AND STABLE.


RECENT NEWS


Packages archive #2

2024-04-29

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A backup package archive (located in the US) has just gone online, to address
connectivity issues reported by some of our users.




The xz package has been backdoored

2024-03-29

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TL;DR: Upgrade your systems NOW!

Following the related OpenWall post:
The upstream tarballs of xz 5.6.0 and 5.6.1 contain a backdoor which uses
liblzma as a means to compromise SSH servers.

Preliminary analysis from the aforementioned post shows that the backdoor is
designed to exploit openssh when linked against libsystemd (which depends on
lzma) to compromise the SSH services. Artix and Arch don't link openssh to
liblzma and thus this attack vector is not possible.

Based on the same analysis, the execution of openssh under systemd is a
prerequisite for the backdoor to activate and given the additional distance of
Artix to systemd (aren't we glad?), the exploit shouldn't affect any running
Artix system.

However, it is strongly advised that all Artix users and administrators out
there immediately upgrade their systems and container images (or at least xz to
version 5.6.1-2) and restart openssh. Versions of xz up to and including 5.4.1-1
are not affected.




Server is back online

2023-12-18

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The server is back online, all systems nominal.




Server malfunction

2023-12-17

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Due to a server malfunction, multiple Artix services are unavailable. Among
them:

 * Gitea
 * Archive
 * Galaxy repository

Unless it's a very serious hardware problem, it should be fixed sometime on
Monday.




Changes to default password hashing algorithm and umask settings

2023-09-23

--------------------------------------------------------------------------------


Following the related Arch announcement

With shadow >= 4.14.0, Artix Linux's default password hashing algorithm changed
from SHA512 to yescrypt.

Furthermore, the umask settings are now configured in /etc/login.defs instead of
/etc/profile.

This should not require any manual intervention.

Reasons for Yescrypt
The password-based key derivation function (KDF) and password hashing scheme
yescrypt has been chosen due to its adoption (readily available in libxcrypt,
which is used by pam) and its stronger resilience towards password cracking
attempts over SHA512.

Although the winner of the Password Hashing Competition has been argon2, this
even more resilient algorithm is not yet available in libxcrypt (attempt one,
attempt two).

Configuring yescrypt
The YESCRYPT_COST_FACTOR setting in /etc/login.defs is currently without effect,
until pam implements reading its value. If a YESCRYPT_COST_FACTOR higher (or
lower) than the default (5) is needed, it can be set using the rounds option of
the pam_unix module (i.e. in /etc/pam.d/system-auth).

General list of changes

 * yescrypt is used as default password hashing algorithm, instead of SHA512
 * pam honors the chosen ENCRYPT_METHOD in /etc/login.defs and does not override
   the chosen method anymore
 * changes in the filesystem (>= 2023.09.18) and pambase (>= 20230918) packages
   ensure, that umask is set centrally in /etc/login.defs instead of
   /etc/profile




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