Bug 697057 - kpasswd fails when using sssd and kadmin server != kdc server
Summary: kpasswd fails when using sssd and kadmin server != kdc server
Alias: None
Product: Fedora
Classification: Fedora
Component: sssd
Version: 14
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Stephen Gallagher
QA Contact: Fedora Extras Quality Assurance
Depends On:
Blocks: 698723 698724
TreeView+ depends on / blocked
Reported: 2011-04-15 17:32 UTC by Daniel Piddock
Modified: 2011-05-05 18:23 UTC (History)
5 users (show)

Fixed In Version: sssd-1.5.7-1.fc14
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 698723 698724 (view as bug list)
Last Closed: 2011-05-05 18:23:59 UTC
Type: ---

Attachments (Terms of Use)

Description Daniel Piddock 2011-04-15 17:32:18 UTC
Description of problem:
kpasswd fails with the error: "kpasswd: Cannot contact any KDC for requested realm changing password" if sssd is used with krb backend and the kadmin service is not running on the KDCs.

Version-Release number of selected component (if applicable):

How reproducible:
Almost every time, predictable.

Steps to Reproduce:
1. System with sssd using krb5 as auth backend. kpasswd service on a different server to the KDC
2. Run 'kpasswd' as a user
3. Enter passwords
Actual results:
"kpasswd: Cannot contact any KDC for requested realm changing password"

Expected results:
kpasswd sends a change password request to the kadmin server.

Additional info:
kpasswd is looking for /var/lib/sss/pubconf/kdcinfo.$REALM, if not found it falls back to the traditional method of using /etc/krb5.conf and then DNS lookup. Which works.

If kdcinfo.$REALM exists, kpasswd then looks for /var/lib/sss/pubconf/kpasswdinfo.$REALM, which never gets created. kpasswd uses the addresses from kdcinfo.$REALM as the kadmin server, which isn't running the kpasswd service. Hence fail.

The file in /var/lib/sss/pubconf/ is only created after sssd-krb5 is poked in the right way, e.g. an auth attempt. After restarting sssd the directory is empty.

/etc/sssd/sssd.conf contains:
config_file_version = 2
reconnection_retries = 3
sbus_timeout = 30
services = nss, pam
domains = default
filter_groups = root
filter_users = root
reconnection_retries = 3
reconnection_retries = 3
cache_credentials = True
debug_level = 0
id_provider = ldap
ldap_uri = ldaps://ldap-auth.mydomain
ldap_id_use_start_tls = False
ldap_search_base = dc=decisionsoft,dc=com
chpass_provider = krb5
auth_provider = krb5
krb5_realm = MYREALM
krb5_kpasswd = kerberos-master.mydomain
krb5_server = kerberos.mydomain

Comment 1 Fedora Update System 2011-04-25 12:08:23 UTC
sssd- has been submitted as an update for Fedora 14.

Comment 2 Fedora Update System 2011-04-30 23:20:01 UTC
Package sssd-1.5.7-1.fc14:
* should fix your issue,
* was pushed to the Fedora 14 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing sssd-1.5.7-1.fc14'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).

Comment 3 Fedora Update System 2011-05-05 18:23:50 UTC
sssd-1.5.7-1.fc14 has been pushed to the Fedora 14 stable repository.  If problems still persist, please make note of it in this bug report.

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