Package: clevis-udisks2
Severity: normal

Dear Maintainer,

[I'm running my tests on Ubuntu 18.04, but I'm pretty sure
it hits Debian too]

I'm playing with clevis and encrypted disks and tried to automatically
decrypt an USB stick - which did not work.

/usr/lib/x86_64-linux-gnu/clevis-luks-udisks2 will be started when
logging in according to /etc/xdg/autostart/clevis-luks-udisks2.desktop.
The program will be started with my user and fails:

$ /usr/lib/x86_64-linux-gnu/clevis-luks-udisks2
Root privileges required!

When looking at the source we have in clevis-luks-udisks2.c, line 314:


        if (setgid(gid) != 0 || setegid(gid) != 0)
            return EXIT_FAILURE;

        if (setuid(uid) != 0 || seteuid(uid) != 0)
            return EXIT_FAILURE;

After "hmod u+s /usr/lib/x86_64-linux-gnu/clevis-luks-udisks2" I can
at least start the program.  Upstream has the following report
concerning Fedora for a similar problem:
https://github.com/latchset/clevis/issues/28
https://github.com/latchset/clevis/pull/45

I think we need to install clevis-luks-udisks2 setuid root on
Debian/Ubuntu too.  Did I miss something else?

-- System Information:
Debian Release: 9.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-6-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), 
LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

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