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Bug 1218926 - Samba ignores default_keytab_name in krb5.conf
Summary: Samba ignores default_keytab_name in krb5.conf
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: samba
Version: 7.3
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: 7.3
Assignee: Andreas Schneider
QA Contact: Andrej Dzilský
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-05-06 08:03 UTC by Ondrej
Modified: 2020-09-10 09:23 UTC (History)
7 users (show)

Fixed In Version: samba-4.6.0-1.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-08-01 18:19:59 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1950 0 normal SHIPPED_LIVE Low: samba security, bug fix, and enhancement update 2017-08-01 18:09:24 UTC

Description Ondrej 2015-05-06 08:03:14 UTC 
Description of problem:
[root@rh6laptop ~]# cat /etc/krb5.conf
...
[libdefaults]
 default_keytab_name = FILE:/var/lib/samba/krb5.keytab
...

[root@rh6laptop ~]# cat /etc/samba/smb.conf 
...
    kerberos method = system keytab

When I do "net ads join", the real location of the system keytab file (var/lib/samba/krb5.keytab) is being ignored. Samba still tries to use /etc/krb5.keytab

tested with samba-common-3.6.23-14.el6_6.x86_64
Comment 4 Andrej Dzilský 2017-04-27 13:38:45 UTC 
I am not able to reproduce this Bug :/ on 3.6.23-14.el6_6.x86_64, it works for me pretty good there.
Also it works on current version of Samba (4.6.0+) too.

I will appreciate any info for testing to get this bug verified.
Comment 5 Ondrej 2017-04-27 14:42:24 UTC 
I can still reproduce this bug on samba-common-3.6.23-42.el6_9.x86_64 using the steps above.
Samba still ignores default_keytab_name setting in /etc/krb5.conf
Comment 7 Ondrej 2017-04-28 07:15:05 UTC 
Which other info shall I provide?
The steps to reproduce are still the same - "net ads join" keeps creating krb5.keytab file in it's default location (/etc) even if a different location (say /var/lib/samba) is specified in /etc/krb5.conf
Comment 8 Andrej Dzilský 2017-04-28 09:54:34 UTC 
Well. Let's start with:

rpm -qa | grep samba
cat /etc/samba/smb.conf
cat /etc/krb5.conf

also run 'net ads join' with parameter '-d10' and attach the log, (e.g. 'net ads join -d10 &> log.join') 

Can I ask you if u entered just 'net ads join' without any parameters or ?

I'd like to find that little detail which prevents me to reproduce bug.

Regards.
Comment 12 Andreas Schneider 2017-05-08 16:45:09 UTC 
> Which other info shall I provide?
> The steps to reproduce are still the same - "net ads join" keeps creating
> krb5.keytab file in it's default location (/etc) even if a different location
> (say /var/lib/samba) is specified in /etc/krb5.conf

See 'dedicated keytab' in 'man smb.conf'.
Comment 13 Ondrej 2017-05-09 08:17:39 UTC 
Does not work either, unfortunately.
When I add:
    kerberos method = dedicated keytab
    dedicated keytab file = /var/lib/samba/krb5.keytab

and then "net ads join", krb5.keytab file is never created.
Comment 14 Andreas Schneider 2017-05-09 08:36:04 UTC 
You need to call 'net ads keytab create'.
Comment 15 Ondrej 2017-05-09 09:17:17 UTC 
When I call 'net ads keyteb create -U admin', krb5.keytab is still created in /etc, ignoring settings in both /etc/krb5.conf and /etc/samba/smb.conf
Comment 16 Ondrej 2017-05-09 11:51:45 UTC 
Created RedHat support case #01845954 to support this
Comment 17 Andrej Dzilský 2017-05-22 10:28:05 UTC 
Kerberos method with 'dedicated keytab' works on samba 4.6.0 too.
Comment 18 errata-xmlrpc 2017-08-01 18:19:59 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2017:1950
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