Some additional info. I enabled sudo debugging by creating /etc/sudo.conf containing:
Debug sudo /var/log/sudo-debug all@info Debug sudoers /var/log/sudoers-debug all@info With the newer (non-functioning) sudo, /var/log/sudo-debug contains: May 3 18:55:50 sudo[8003] comparing dev 34817 to /dev/pts/1: match! @ sudo_ttyname_dev() /build/sudo-40pSZP/sudo-1.8.16/src/ttyname.c:336 May 3 18:55:50 sudo[8003] settings: run_shell=true May 3 18:55:50 sudo[8003] settings: progname=sudo May 3 18:55:50 sudo[8003] settings: network_addrs=10.0.0.230/255.255.255.0 xxxx:xxxx:xxxx:xxxx::230/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff fe80::1:xxxx:xxxx:xxxx/ffff:ffff:ffff:ffff:: May 3 18:55:50 sudo[8003] settings: plugin_dir=/usr/lib/sudo/ May 3 18:55:51 sudo[8003] policy plugin returns 0 With the older (working) sudo, /var/log/sudo-debug contains: May 3 19:00:19 sudo[8746] comparing dev 34817 to /dev/pts/1: match! @ sudo_ttyname_dev() /build/sudo-g3ghsu/sudo-1.8.16/src/ttyname.c:336 May 3 19:00:19 sudo[8746] settings: run_shell=true May 3 19:00:19 sudo[8746] settings: progname=sudo May 3 19:00:19 sudo[8746] settings: network_addrs=10.0.0.230/255.255.255.0 xxxx:xxxx:xxxx:xxxx::230/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff fe80::1:xxxx:xxxx:xxxx/ffff:ffff:ffff:ffff:: May 3 19:00:19 sudo[8746] settings: plugin_dir=/usr/lib/sudo/ May 3 19:00:22 sudo[8746] policy plugin returns 1 May 3 19:00:22 sudo[8746] settings: run_shell=true May 3 19:00:22 sudo[8746] settings: progname=sudo May 3 19:00:22 sudo[8746] settings: network_addrs=10.0.0.230/255.255.255.0 xxxx:xxxx:xxxx:xxxx::230/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff fe80::1:xxxx:xxxx:xxxx/ffff:ffff:ffff:ffff:: May 3 19:00:22 sudo[8746] settings: plugin_dir=/usr/lib/sudo/ May 3 19:00:22 sudo[8746] command info from plugin: May 3 19:00:22 sudo[8746] 0: command=/bin/bash May 3 19:00:22 sudo[8746] 1: runas_uid=0 May 3 19:00:22 sudo[8746] 2: runas_gid=0 May 3 19:00:22 sudo[8746] 3: runas_groups=0 May 3 19:00:22 sudo[8746] 4: closefrom=3 May 3 19:00:22 sudo[8746] 5: set_utmp=true May 3 19:00:22 sudo[8746] 6: umask=022 May 3 19:00:22 sudo[8746] executed /bin/bash, pid 8754 May 3 19:00:22 sudo[8746] sudo_ev_add_v1: adding event 0x55e83b06c630 to base 0x55e83b07ea40 May 3 19:00:22 sudo[8746] sudo_ev_add_v1: adding event 0x55e83b078180 to base 0x55e83b07ea40 May 3 19:00:22 sudo[8746] signal pipe fd 10 May 3 19:00:22 sudo[8746] backchannel fd 5 May 3 19:00:22 sudo[8754] exec /bin/bash [/bin/bash] May 3 19:00:22 sudo[8746] sudo_ev_scan_impl: 1 fds ready May 3 19:00:22 sudo[8746] failed to read child status: EOF May 3 19:00:22 sudo[8746] sudo_ev_del_v1: removing event 0x55e83b078180 from base 0x55e83b07ea40 (/var/log/sudoers-debug is not created in either case) Note "policy plugin returns 0" in the first case. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to sudo in Ubuntu. https://bugs.launchpad.net/bugs/1688034 Title: 1.8.16-0ubuntu1.3 update breaks sudo with freeipa-client / sssd Status in sudo package in Ubuntu: New Bug description: ubuntu 16.04, enrolled with freeipa-client to FreeIPA 4.4.0 (under CentOS 7) With sudo 1.8.16-0ubuntu1, everything is fine: brian.candler@api-dev:~$ sudo -s [sudo] password for brian.candler: root@api-dev:~# After update to 1.8.16-0ubuntu1.3, it no longer works: brian.candler@api-dev:~$ sudo -k brian.candler@api-dev:~$ sudo -s [sudo] password for brian.candler: brian.candler is not allowed to run sudo on api-dev.int.example.com. This incident will be reported. This is repeatable: downgrade sudo and it works again. Seems very likely related to change made as part of #1607666, which changes how sudo policies are matched, but has unexpected regression. --- Additional info --- The sudo policy in IPA is extremely simple. It has a single rule, which says: - applies to users in groups "system_administrators" and "security_administrators" - applies to any host - applies to any command In LDAP under ou=sudoers tree, the groups are flattened out: # system administrators on all hosts, sudoers, ipa.example.com dn: cn=system administrators on all hosts,ou=sudoers,dc=ipa,dc=example,dc=com sudoRunAsGroup: ALL objectClass: sudoRole objectClass: top sudoUser: brian.candler sudoUser: ... sudoUser: ... list more users sudoUser: ... sudoRunAsUser: ALL sudoCommand: ALL sudoHost: ALL cn: system administrators on all hosts Under cn=sudorules,cn=sudo it refers to the groups rather than the individuals: # 59ffb10a-9c61-11e6-b5b8-00163efd5284, sudorules, sudo, ipa.example.com dn: ipaUniqueID=59ffb10a-9c61-11e6-b5b8-00163efd5284,cn=sudorules,cn=sudo,dc=ipa,dc=example,dc=com ipaSudoRunAsUserCategory: all ipaSudoRunAsGroupCategory: all description: admins have full sudo access on any host they can ssh into cmdCategory: all hostCategory: all memberUser: cn=system_administrators,cn=groups,cn=accounts,dc=ipa,dc=example,dc=com memberUser: cn=security_administrators,cn=groups,cn=accounts,dc=ipa,dc=example,dc=com objectClass: ipasudorule objectClass: ipaassociation ipaEnabledFlag: TRUE cn: system administrators on all hosts ipaUniqueID: 59ffb10a-9c61-11e6-b5b8-00163efd5284 I have no workaround other than downgrade. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: sudo 1.8.16-0ubuntu1.3 ProcVersionSignature: Ubuntu 4.4.0-1016.25-aws 4.4.59 Uname: Linux 4.4.0-1016-aws x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 Date: Wed May 3 16:01:23 2017 Ec2AMI: ami-a8d2d7ce Ec2AMIManifest: (unknown) Ec2AvailabilityZone: eu-west-1a Ec2InstanceType: t2.small Ec2Kernel: unavailable Ec2Ramdisk: unavailable ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: sudo UpgradeStatus: No upgrade log present (probably fresh install) VisudoCheck: /etc/sudoers: parsed OK /etc/sudoers.d/90-cloud-init-users: parsed OK /etc/sudoers.d/README: parsed OK To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/1688034/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
