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Message #11877
[Bug 1685754] Re: 'systemd --user' unduly forces umask=0022
** No longer affects: dbus (Ubuntu)
** No longer affects: dbus (Ubuntu Bionic)
** No longer affects: gnome-terminal (Ubuntu)
** No longer affects: gnome-terminal (Ubuntu Bionic)
** Project changed: nautilus => ubuntu-translations
** No longer affects: ubuntu-translations
** Project changed: gedit => ubuntu-translations
** No longer affects: ubuntu-translations
** Project changed: gnome-session => ubuntu-translations
** No longer affects: ubuntu-translations
** Bug watch removed: freedesktop.org Bugzilla #18446
https://bugs.freedesktop.org/show_bug.cgi?id=18446
** Bug watch removed: bugzilla.gnome.org/ #784113
https://bugzilla.gnome.org/show_bug.cgi?id=784113
** Bug watch removed: GNOME Bug Tracker #780622
https://gitlab.gnome.org/780622
** Project changed: gnome-terminal => ubuntu-translations
** No longer affects: ubuntu-translations
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https://bugs.launchpad.net/bugs/1685754
Title:
'systemd --user' unduly forces umask=0022
Status in systemd:
Unknown
Status in systemd package in Ubuntu:
Fix Released
Status in systemd source package in Bionic:
Fix Committed
Bug description:
[impact]
pam_umask, from /etc/passwd, is not honored in systemd --user
instances
[test case]
on a desktop system, edit /etc/passwd to change the test user entry
(e.g. the 'ubuntu' user) to include 'umask=007' in the GECOS field
(5th field). For example change:
ubuntu:x:1000:1000:Ubuntu:/home/ubuntu:/bin/bash
to:
ubuntu:x:1000:1000:Ubuntu,umask=007:/home/ubuntu:/bin/bash
You may need to reboot for your X session to pick up the change.
Then, from the graphical desktop, open a terminal and run:
$ gnome-terminal -e sh
in the opened terminal, run:
$ umask
the number shown should be 0007, as set in the passwd file
[regression potential]
any regression would likely result in an incorrect umask for the user
whose passwd entry is modified.
[scope]
this is needed only for b
this is fixed in systemd upstream by commit
5e37d1930b41b24c077ce37c6db0e36c745106c7 which was first included in
v246, so this is fixed in g and later. This commit was also picked up
by Debian and included in the v245 release for focal, so this is fixed
in focal already.
[original description]
In order to set the default umask of my users to 027 or 007, I
followed the instructions provided in 'man pam_umask' :
In the 'gecos' field of '/etc/passwd', I have inserted 'umask=027' or
'umask=007' (for myself).
Then, MOST graphical applications systematically run with the correct
umask.
In particular, when I press Alt-F2, run 'xterm sh' and type 'umask',
it systematically displays 0007.
But when I press Alt-F2, run 'gnome-terminal -e sh' and type 'umask',
it systematically displays 0022.
That is BAD, and is a security issue.
Workaround : Inside the newly created '/etc/profile.d/umask.sh', and in each '~/.bashrc', add following content :
UMASK="$(grep -o "^$USER:.*,umask=0[0-7]*" /etc/passwd)"
if [ "$UMASK" ]; then
umask "${UMASK#$USER:*,umask=}"
fi
In fact, 'gnome-terminal' MUST NOT force umask=022, but keep umask
unchanged.
Thank you in advance for a quick correction.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: gnome-terminal 3.20.2-1ubuntu8
ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
Uname: Linux 4.10.0-19-generic x86_64
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
CurrentDesktop: X-Cinnamon
Date: Mon Apr 24 08:36:58 2017
InstallationDate: Installed on 2017-03-28 (26 days ago)
InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Beta amd64 (20170321)
SourcePackage: gnome-terminal
UpgradeStatus: No upgrade log present (probably fresh install)
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