Bionic verification
First, confirming the bug:
ubuntu@bionic-verification-sssd-sudo:~$ apt-cache policy libsss-sudo
libsss-sudo:
Installed: 1.16.1-1ubuntu1.2
Candidate: 1.16.1-1ubuntu1.2
Version table:
*** 1.16.1-1ubuntu1.2 500
500 http://br.archive.ubuntu.com/ubuntu bionic-updates/main amd64
Packages
$ grep ^sudoers /etc/nsswitch.conf
sudoers: files sss
Removing sss and checking again:
ubuntu@bionic-verification-sssd-sudo:~$ sudo vi /etc/nsswitch.conf
ubuntu@bionic-verification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
sudoers: files
Reinstalling brings sss back to the sudoers line:
ubuntu@bionic-verification-sssd-sudo:~$ sudo apt install --reinstall libsss-sudo
Reading package lists... Done
...
Processing triggers for libc-bin (2.27-3ubuntu1) ...
ubuntu@bionic-verification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
sudoers: files sss
Now, prior to the upgrade to the package in proposed, removing the sss bit
again:
ubuntu@bionic-verification-sssd-sudo:~$ sudo vi /etc/nsswitch.conf
ubuntu@bionic-verification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
sudoers: files
ubuntu@bionic-verification-sssd-sudo:~$ sudo apt install libsss-sudo
Reading package lists... Done
...
ubuntu@bionic-verification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
sudoers: files
"sss" is not back, confirming the fix.
ubuntu@bionic-verification-sssd-sudo:~$ apt-cache policy libsss-sudo
libsss-sudo:
Installed: 1.16.1-1ubuntu1.3
Candidate: 1.16.1-1ubuntu1.3
Version table:
*** 1.16.1-1ubuntu1.3 500
500 http://br.archive.ubuntu.com/ubuntu bionic-proposed/main amd64
Packages
But it's again placed there on a fresh install:
ubuntu@bionic-verification-sssd-sudo:~$ sudo apt purge libsss-sudo -y
Reading package lists... Done
Building dependency tree
...
ubuntu@bionic-verification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
ubuntu@bionic-verification-sssd-sudo:~$ sudo apt install libsss-sudo
Reading package lists... Done
Building dependency tree
...
ubuntu@bionic-verification-sssd-sudo:~$ grep ^sudoers /etc/nsswitch.conf
sudoers: files sss
Bionic verification succeeded.
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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https://bugs.launchpad.net/bugs/1781991
Title:
libsss-sudo.postinst clobbers local change to /etc/nsswitch.conf
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