[Bug 1644428] Re: Unable to log in with AD account after update

[ChristianEhrhardt]

Not sure if this should be a new bug, opening a zesty task for now until we are sure.
Summary: pam_winbind.so fails to open
Related: bug 1584485
Repro:
 $ apt-get install samba winbind libnss-winbind libpam-winbind
 $ sed -i -e 's/^passwd:         compat/passwd:         winbind compat/' /etc/nsswitch.conf
 $ systemctl restart smbd nmbd winbind
 $ tail -n 5 /var/log/auth.log
May  5 06:31:43 zesty-test groupadd[19598]: group added to /etc/group: name=sambashare, GID=118
May  5 06:31:43 zesty-test groupadd[19598]: group added to /etc/gshadow: name=sambashare
May  5 06:31:43 zesty-test groupadd[19598]: new group: name=sambashare, GID=118
May  5 06:32:08 zesty-test sudo: PAM unable to dlopen(pam_winbind.so): /lib/security/pam_winbind.so: cannot open shared object file: No such file or directory
May  5 06:32:08 zesty-test sudo: PAM adding faulty module: pam_winbind.so

Also the path is different as outlined before:
dpkg -S pam_winbind.so
libpam-winbind:amd64: /lib/x86_64-linux-gnu/security/pam_winbind.so


Confirmed at least on zesty for now, but I'm no windbind/pam expert so I struggle to see what is going on without diving much deeper - this might even be just the wrong way to set it up ... ? :-/

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https://bugs.launchpad.net/bugs/1644428

Title:
  Unable to log in with AD account after update

Status in samba package in Ubuntu:
  Confirmed
Status in samba source package in Trusty:
  Fix Released

Bug description:
  After performing a system update one of my users was no longer able to
  authenticate against Active Directory. This is on a Ubuntu 14.04 on
  amd64.

  The error in /var/log/auth.log was:

  Nov 24 15:08:06 haggerstone lightdm: PAM unable to
  dlopen(pam_winbind.so): /lib/security/pam_winbind.so: cannot open
  shared object file: No such file or directory

  I tried rebooting thinking something broke during the update, but I
  got the same error.

  I checked against my PC and saw that there were updates pending for
  the samba packages. I used the version numbers on my PC to perform a
  downgrade to 2:4.3.11+dfsg-0ubuntu0.14.04.1 and the problem went away.

  The affected version is 2:4.3.11+dfsg-0ubuntu0.14.04.2

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