[gentoo-dev] [PATCH] 2021-07-07-systemd-tmpfiles: restore news item

[Georgy Yakovlev]

This reverts commit a93dbc1701de3b983c6f791391f7967d4b919b4a.
and addresses some feedback items
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 .../2021-07-07-systemd-tmpfiles.en.txt        | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 2021-07-07-systemd-tmpfiles/2021-07-07-systemd-tmpfiles.en.txt

diff --git a/2021-07-07-systemd-tmpfiles/2021-07-07-systemd-tmpfiles.en.txt b/2021-07-07-systemd-tmpfiles/2021-07-07-systemd-tmpfiles.en.txt
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--- /dev/null
+++ b/2021-07-07-systemd-tmpfiles/2021-07-07-systemd-tmpfiles.en.txt
@@ -0,0 +1,66 @@
+Title: opentmpfiles deprecation
+Author: Georgy Yakovlev <gyakovlev@g.o>
+Author: Sam James <sam@g.o>
+Posted: 2021-07-09
+Revision: 2
+News-Item-Format: 2.0
+Display-If-Installed: sys-apps/opentmpfiles
+Display-If-Installed: sys-apps/systemd-tmpfiles
+
+A tmpfiles [0] implementation provides a generic mechanism to define
+the creation of regular files, directories, pipes, and device nodes,
+adjustments to their access mode, ownership, attributes, quota
+assignments, and contents, and finally their time-based removal.
+It is commonly used for volatile and temporary files and directories
+such as those located under /run/, /tmp/, /var/tmp/, the API file
+systems such as /sys/ or /proc/, as well as some other directories
+below /var/. [1]
+
+On 2021-07-06, the sys-apps/opentmpfiles package was masked due to a
+root privilege escalation vulnerability (CVE-2017-18925 [2],
+bug #751415 [3], issue 4 [4] upstream).
+
+The use of opentmpfiles is discouraged by its maintainer due to the
+unpatched vulnerability and other long-standing bugs [5].
+
+Users will start seeing their package manager trying to replace
+sys-apps/opentmpfiles with sys-apps/systemd-tmpfiles because it is
+another provider of virtual/tmpfiles.
+
+Despite the name, 'systemd-tmpfiles' does not depend on systemd, does
+not use dbus, and is just a drop-in replacement for opentmpfiles. It is
+a small binary built from systemd source code, but works separately,
+similarly to eudev or elogind. It is known to work on both glibc and
+musl systems.
+
+Note that systemd-tmpfiles is specifically for non-systemd systems. It
+is intended to be used on an OpenRC system.
+
+If you wish to selectively test systemd-tmpfiles, follow those steps:
+
+ 1. # emerge --oneshot sys-apps/systemd-tmpfiles
+ 2. # reboot
+ 3. # rm /etc/runlevels/boot/opentmpfiles-setup
+ 4. # rm /etc/runlevels/sysinit/opentmpfiles-dev
+
+No other steps required.
+
+If, after reviewing the linked bug reference for opentmpfiles, you feel
+your system is not vulnerable/applicable to the attack described, you
+can unmask [6] opentmpfiles at your own risk:
+
+ 1. In /etc/portage/package.unmask, add a line:
+ -sys-apps/opentmpfiles-
+ 2. # emerge --oneshot sys-apps/opentmpfiles
+
+Note that opentmpfiles is likely to be removed from gentoo repository
+in the future.
+
+[0] https://www.freedesktop.org/software/systemd/man/systemd-tmpfiles.html
+[1] https://www.freedesktop.org/software/systemd/man/tmpfiles.d.html
+[2] https://nvd.nist.gov/vuln/detail/CVE-2017-18925
+[3] https://bugs.gentoo.org/751415
+[4] https://github.com/OpenRC/opentmpfiles/issues/4
+[5] https://archives.gentoo.org/gentoo-dev/message/bce91b9d37db0b1e0980eb923a8607c9
+[6] https://wiki.gentoo.org/wiki/Knowledge_Base:Unmasking_a_package
+
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2.32.0