Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: sudo (Ubuntu)
Status: New => Confirmed
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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:
Confirmed
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
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