[SSSD-users] sssd_sudo receives 0 rules but ldap search returns 5, what is wrong?

Teemu Keinonen Teemu.Keinonen at relex.fi
Thu Jul 3 07:09:59 UTC 2014


On 01/07/14 12:18, "Jakub Hrozek" <jhrozek at redhat.com> wrote:

>On Fri, Jun 27, 2014 at 12:24:44PM +0000, Teemu Keinonen wrote:
>> Hello,
>> 
>> I’m configuring CentOS 6.5 server to authenticate users and sudo rights
>>against local Samba 4.1.8 (compiled from source). Sssd is 1.9.2 from
>>package repository. User authentication works OK, I can log in with user
>>that exists only in Samba but sudoing with the same user fails. After
>>hours of trying I still can’t get it right, sssd_sudo receives 0 rules
>>from samba. Doing ldapsearch with criteria from logs do return sudoer
>>entries as below. Am I missing something obvious?
>> Below are (in order) ldapsearch, ssssd.conf and sssd_default.log (part
>>which I think relevant).
>
>> 
>> [root at dc1 sssd]# ldapsearch -h dc1 -Y GSSAPI -b
>>OU=SUDOers,DC=teemu,DC=local
>>'(&(objectClass=sudoRole)(|(!(sudoHost=*))(sudoHost=ALL)(sudoHost=Host01)
>>(sudoHost=Host01.example.com)(sudoHost=192.168.0.21)(sudoHost=192.168.0.0
>>/24)(sudoHost=fe80::786b:f4ff:fe87:3314)(sudoHost=fe80::/64)(sudoHost=+*)
>>(|(sudoHost=*\\*)(sudoHost=*?*)(sudoHost=*\**)(sudoHost=*[*]*))))'
>> SASL/GSSAPI authentication started
>> SASL username: administrator at TEEMU.LOCAL
>
>I wonder if this ^^ could be the issue.
>
>SSSD authenticates as the host itself, you seem to have authenticated as
>the administrator. Maybe there are some ACIs on the server preventing
>SSSD from accessing the rules?
>
>Can you try:
>    kdestroy
>    kinit -k -t /etc/krb5.sssd.keytab dc1$@TEEMU.LOCAL

Update on this. It seems dc1 at TEEMU.LOCAL can’t read required attributes
from sudoers and that causes the problem. Do I need to modify LDAP
permissions somehow to enable reading of the required attributes? Example
of search with missing attributes below.

[root at dc1 ~]# kinit 'DC1$@TEEMU.LOCAL' -k -t /etc/krb5.sssd.keytab
[root at dc1 ~]# klist
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: DC1$@TEEMU.LOCAL

Valid starting     Expires            Service principal
07/03/14 10:06:54  07/03/14 20:06:54  krbtgt/TEEMU.LOCAL at TEEMU.LOCAL
	renew until 07/10/14 10:06:54

[root at dc1 ~]# ldapsearch  -h dc1 -Y GSSAPI -b ou=Sudoers,dc=teemu,dc=local
SASL/GSSAPI authentication started
SASL username: DC1$@TEEMU.LOCAL
SASL SSF: 56
SASL data security layer installed.
# extended LDIF
#
# LDAPv3
# base <ou=Sudoers,dc=teemu,dc=local> with scope subtree
# filter: (objectclass=*)
# requesting: ALL
#

# SUDOers, teemu.local
dn: OU=SUDOers,DC=teemu,DC=local
objectClass: top
objectClass: organizationalUnit
ou: SUDOers
instanceType: 4
whenCreated: 20140625194301.0Z
whenChanged: 20140625194301.0Z
uSNCreated: 3797
uSNChanged: 3797
name: SUDOers
objectGUID:: avd+e6OrGkOV5qqtjV39vQ==
objectCategory: 
CN=Organizational-Unit,CN=Schema,CN=Configuration,DC=teemu,DC=
 local
distinguishedName: OU=SUDOers,DC=teemu,DC=local

# defaults, SUDOers, teemu.local
dn: CN=defaults,OU=SUDOers,DC=teemu,DC=local

# %wheel, SUDOers, teemu.local
dn: CN=%wheel,OU=SUDOers,DC=teemu,DC=local

# search result
search: 4
result: 0 Success

# numResponses: 4
# numEntries: 3




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