touch-packages team mailing list archive

[Vincent Jestin <mazargman@xxxxxxxxx>]

Hello,

Same problem here after doing an upgrade from 12.04 to 14.04.

On the affected machine, some users (basically admins) have both  unix
accounts and LDAP accounts.

Users with both accounts can log in with unix or ldap password. However,
when the desktop is locked, the only way to unlock is to use a unix
password.

I've tried unix_chkpwd suid workaround (no success) and checked
/etc/shadow file permissions (was ok).

I'm using libpam-ldap.

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to unity in Ubuntu.
https://bugs.launchpad.net/bugs/1314095

Title:
  Unity Lockscreen in 14.04 can't unlock when using LDAP account

Status in Unity:
  Incomplete
Status in unity package in Ubuntu:
  Incomplete

Bug description:
  My setup is:

  Ubuntu 14.04 LTS,
  ldap accounts,
  krb5 authentication,
  Lightdm,
  Unity session

  ldap+krb5 is configured using nss-ldapd and nslcd. It works fine. getent passwd and getent shadow works fine.
  I am able to login in console without any problems.
  I was able to login in lightdm.
  Then I used the lock screen.
  I could not disable the lock screen using my password.
  I rebooted my computer.

  Now:
  After logging in through lightdm, the unity lockscreen locks the screen immediately and I can not disable it using my password.

  From my short inspection of auth.log and unix_chkpwd sources it seems,
  that unix_chkpwd works fine when called from lightdm and fails to get
  user info when called from unity lockscreen.


  lsb_release -rd
  Description:	Ubuntu 14.04 LTS
  Release:	14.04

  apt-cache policy unity lightdm libpam-modules
  unity:
    Installed: 7.2.0+14.04.20140416-0ubuntu1
    Candidate: 7.2.0+14.04.20140416-0ubuntu1
    Version table:
   *** 7.2.0+14.04.20140416-0ubuntu1 0
          500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status
  lightdm:
    Installed: 1.10.0-0ubuntu3
    Candidate: 1.10.0-0ubuntu3
    Version table:
   *** 1.10.0-0ubuntu3 0
          500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status
  libpam-modules:
    Installed: 1.1.8-1ubuntu2
    Candidate: 1.1.8-1ubuntu2
    Version table:
   *** 1.1.8-1ubuntu2 0
          500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status

  Contents of /var/log/auth.log:

  Apr 29 06:49:27 localhost lightdm: pam_succeed_if(lightdm:auth): requirement "user ingroup nopasswdlogin" not met by user "user"
  Apr 29 06:49:31 localhost lightdm: pam_unix(lightdm:auth): authentication failure; logname= uid=0 euid=0 tty=:2 ruser= rhost=  user=user
  Apr 29 06:49:31 localhost lightdm: pam_krb5(lightdm:auth): user user authenticated as user@NETWORK
  Apr 29 06:49:32 localhost lightdm[15604]: pam_unix(lightdm-greeter:session): session closed for user lightdm
  Apr 29 06:49:37 localhost unix_chkpwd[15825]: check pass; user unknown
  Apr 29 06:49:37 localhost unix_chkpwd[15825]: password check failed for user (user)
  Apr 29 06:49:37 localhost compiz: pam_unix(lightdm:auth): authentication failure; logname= uid=1001 euid=1001 tty= ruser= rhost=  user=user
  Apr 29 06:49:37 localhost compiz: pam_krb5(lightdm:auth): user user authenticated as user@NETWORK
  Apr 29 06:49:37 localhost unix_chkpwd[15826]: could not obtain user info (user)
  Apr 29 06:49:37 localhost unix_chkpwd[15827]: could not obtain user info (user)
  Apr 29 06:49:37 localhost compiz: pam_succeed_if(lightdm:auth): requirement "user ingroup nopasswdlogin" not met by user "user"

  cat /etc/pam.d/common-auth 
  account     required    pam_unix.so
  auth        required    pam_group.so
  auth [success=2 default=ignore] pam_unix.so try_first_pass nullok_secure
  auth [success=1 default=ignore] pam_krb5.so try_first_pass minimum_uid=200
  auth        requisite   pam_deny.so
  auth        required    pam_permit.so

  auth        optional    pam_afs_session.so minimum_uid=200
  auth        optional    pam_ecryptfs.so unwrap
  auth        optional    pam_cap.so

  cat /etc/pam.d/common-account 
  account     required    pam_unix.so

  cat /etc/pam.d/lightdm
  auth        requisite   pam_nologin.so
  auth        sufficient  pam_succeed_if.so user ingroup nopasswdlogin
  @include common-auth
  auth        optional    pam_gnome_keyring.so
  @include common-account
  session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so close
  auth        optional    pam_group.so
  session     required    pam_limits.so
  @include common-session
  session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so open
  session     optional    pam_gnome_keyring.so auto_start
  session     required    pam_env.so readenv=1
  session     required    pam_env.so readenv=1 user_readenv=1 envfile=/etc/default/locale
  @include common-password

To manage notifications about this bug go to:
https://bugs.launchpad.net/unity/+bug/1314095/+subscriptions