Karolin Seeger
2018-Aug-29 10:38 UTC
[Samba] [Announce] Samba 4.9.0rc4 Available for Download
Release Announcements
====================
This is the fourth release candidate of Samba 4.9. This is *not*
intended for production environments and is designed for testing
purposes only. Please report any defects via the Samba bug reporting
system at https://bugzilla.samba.org/.
Samba 4.9 will be the next version of the Samba suite.
UPGRADING
========
NEW FEATURES/CHANGES
===================
net ads setspn
---------------
There is a new 'net ads setspn' sub command for managing Windows SPN(s)
on the AD. This command aims to give the basic functionality that is
provided on windows by 'setspn.exe' e.g. ability to add, delete and list
Windows SPN(s) stored in a Windows AD Computer object.
The format of the command is:
net ads setspn list [machine]
net ads setspn [add | delete ] SPN [machine]
'machine' is the name of the computer account on the AD that is to be
managed.
If 'machine' is not specified the name of the 'client' running
the command
is used instead.
The format of a Windows SPN is
'serviceclass/host:port/servicename' (servicename and port are
optional)
serviceclass/host is generally sufficient to specify a host based service.
net ads keytab changes
----------------------
net ads keytab add no longer attempts to convert the passed serviceclass
(e.g. nfs, html etc.) into a Windows SPN which is added to the Windows AD
computer object. By default just the keytab file is modified.
A new keytab subcommand 'add_update_ads' has been added to preserve the
legacy behaviour. However the new 'net ads setspn add' subcommand should
really be used instead.
net ads keytab create no longer tries to generate SPN(s) from existing
entries in a keytab file. If it is required to add Windows SPN(s) then
'net ads setspn add' should be used instead.
Local authorization plugin for MIT Kerberos
-------------------------------------------
This plugin controls the relationship between Kerberos principals and AD
accounts through winbind. The module receives the Kerberos principal and the
local account name as inputs and can then check if they match. This can resolve
issues with canonicalized names returned by Kerberos within AD. If the user
tries to log in as 'alice', but the samAccountName is set to ALICE
(uppercase),
Kerberos would return ALICE as the username. Kerberos would not be able to map
'alice' to 'ALICE' in this case and auth would fail. With this
plugin account
names can be correctly mapped. This only applies to GSSAPI authentication,
not for the getting the initial ticket granting ticket.
VFS audit modules
-----------------
The vfs_full_audit module has changed it's default set of monitored
successful
and failed operations from "all" to "none". That helps to
prevent potential
denial of service caused by simple addition of the module to the VFS objects.
Also, modules vfs_audit, vfs_ext_audit and vfs_full_audit now accept any valid
syslog(3) facility, in accordance with the manual page.
Database audit support
----------------------
Changes to the Samba AD's sam.ldb database are now logged to Samba's
debug log
under the "dsdb_audit" debug class and "dsdb_json_audit" for
JSON formatted log
entries.
Transaction commits and roll backs are now logged to Samba's debug logs
under
the "dsdb_transaction_audit" debug class and
"dsdb_transaction_json_audit" for
JSON formatted log entries.
Password change audit support
-----------------------------
Password changes in the AD DC are now logged to Samba's debug logs under the
"dsdb_password_audit" debug class and
"dsdb_password_json_audit" for JSON
formatted log entries.
Group membership change audit support
-------------------------------------
Group membership changes on the AD DC are now logged to
Samba's debug log under the "dsdb_group_audit" debug class and
"dsdb_group_json_audit" for JSON formatted log entries.
Log Authentication duration
---------------------------
For NTLM and Kerberos KDC authentication, the authentication duration is now
logged. Note that the duration is only included in the JSON formatted log
entries.
JSON library Jansson required for the AD DC
-------------------------------------------
By default the Jansson JSON library is required for Samba to build.
It is strictly required for the Samba AD DC, and is optional for
builds --without-ad-dc by specifying --without-json-audit at configure
time.
New Experimental LMDB LDB backend
---------------------------------
A new experimental LDB backend using LMDB is now available. This allows
databases larger than 4Gb (Currently the limit is set to 6Gb, but this will be
increased in a future release). To enable lmdb, provision or join a domain using
the --backend-store=mdb option.
This requires that a version of lmdb greater than 0.9.16 is installed and that
samba has not been built with the --without-ldb-lmdb option.
Please note this is an experimental feature and is not recommended for
production deployments.
Password Settings Objects
-------------------------
Support has been added for Password Settings Objects (PSOs). This AD feature is
also known as Fine-Grained Password Policies (FGPP).
PSOs allow AD administrators to override the domain password policy settings
for specific users, or groups of users. For example, PSOs can force certain
users to have longer password lengths, or relax the complexity constraints for
other users, and so on. PSOs can be applied to groups or to individual users.
When multiple PSOs apply to the same user, essentially the PSO with the best
precedence takes effect.
PSOs can be configured and applied to users/groups using the 'samba-tool
domain
passwordsettings pso' set of commands.
Domain backup and restore
-------------------------
A new samba-tool command has been added that allows administrators to create a
backup-file of their domain DB. In the event of a catastrophic failure of the
domain, this backup-file can be used to restore Samba services.
The new 'samba-tool domain backup online' command takes a snapshot of
the
domain DB from a given DC. In the event of a catastrophic DB failure, all DCs
in the domain should be taken offline, and the backup-file can then be used to
recreate a fresh new DC, using the 'samba-tool domain backup restore'
command.
Once the backed-up domain DB has been restored on the new DC, other DCs can
then subsequently be joined to the new DC, in order to repopulate the Samba
network.
Domain rename tool
------------------
Basic support has been added for renaming a Samba domain. The rename feature is
designed for the following cases:
1). Running a temporary alternate domain, in the event of a catastrophic
failure of the regular domain. Using a completely different domain name and
realm means that the original domain and the renamed domain can both run at the
same time, without interfering with each other. This is an advantage over
creating a regular 'online' backup - it means the renamed/alternate
domain can
provide core Samba network services, while trouble-shooting the fault on the
original domain can be done in parallel.
2). Creating a realistic lab domain or pre-production domain for testing.
Note that the renamed tool is currently not intended to support a long-term
rename of the production domain. Currently renaming the GPOs is not supported
and would need to be done manually.
The domain rename is done in two steps: first, the 'samba-tool domain backup
rename' command will clone the domain DB, renaming it in the process, and
producing a backup-file. Then, the 'samba-tool domain backup restore'
command
takes the backup-file and restores the renamed DB to disk on a fresh DC.
New samba-tool options for diagnosing DRS replication issues
------------------------------------------------------------
The 'samba-tool drs showrepl' command has two new options controlling
the output. With --summary, the command says very little when DRS
replication is working well. With --json, JSON is produced. These
options are intended for human and machine audiences, respectively.
The 'samba-tool visualize uptodateness' visualizes replication lag as
a heat-map matrix based on the DRS uptodateness vectors. This will
show you if (but not why) changes are failing to replicate to some DCs.
Automatic site coverage and GetDCName improvements
--------------------------------------------------
Samba's AD DC now automatically claims otherwise empty sites based on
which DC is the nearest in the replication topology.
This, combined with efforts to correctly identify the client side in
the GetDCName Netlogon call will improve service to sites without a
local DC.
Improved samba-tool computer command
------------------------------------
The 'samba-tool computer' command allow manipulation of computer
accounts including creating a new computer and resetting the password.
This allows an 'offline join' of a member server or workstation to the
Samba AD domain.
Samba performance tool now operates against Microsoft Windows AD
----------------------------------------------------------------
The Samba AD performance testing tool traffic_reply can now operate
against a Windows based AD domain. Previously it only operated
correctly against Samba.
DNS entries are now cleaned up during DC demote
-----------------------------------------------
DNS records are now cleaned up as part of the 'samba-tool domain
demote' including both the default and --remove-other-dead-server
modes.
Additionally DNS records can be automatically cleaned up for a given
name with the 'samba-tool dns cleanup' command, which aids in cleaning
up partially removed DCs.
samba-tool ntacl sysvolreset is now much faster
-----------------------------------------------
The 'samba-tool ntacl sysvolreset' command, used on the Samba AD DC,
is now much faster than in previous versions, after an internal
rework.
Samba now tested with CI GitLab
-------------------------------
Samba developers now have pre-commit testing available in GitLab,
giving reviewers confidence that the submitted patches pass a full CI
before being submitted to the Samba Team's own autobuild system.
Dynamic DNS record scavenging support
-------------------------------------
It is now possible to enable scavenging of DNS Zones to remove DNS
records that were dynamically created and have not been touched in
some time.
This support should however only be enabled on new zones or new
installations. Sadly old Samba versions suffer from BUG 12451 and
mark dynamic DNS records as static and static records as dynamic.
While a dbcheck rule may be able to find these in the future,
currently a reliable test has not been devised.
Finally, there is not currently a command-line tool to enable this
feature, currently it should be enabled from the DNS Manager tool from
Windows. Also the feature needs to have been enabled by setting the smb.conf
parameter "dns zone scavenging = yes".
CTDB changes
------------
There are many changes to CTDB in this release.
* Configuration has been completely overhauled
- Daemon and tool options are now specified in a new ctdb.conf
Samba-style configuration file. See ctdb.conf(5) for details.
- Event script configuration is no longer specified in the top-level
configuration file. It can now be specified per event script.
For example, configuration options for the 50.samba event script
can be placed alongside the event script in a file called
50.samba.options. Script options can also be specified in a new
script.options file. See ctdb-script.options(5) for details.
- Options that affect CTDB startup should be configured in the
distribution-specific configuration file. See ctdb.sysconfig(5)
for details.
- Tunable settings are now loaded from ctdb.tunables. Using
CTDB_SET_TunableVariable=<value> in the main configuration file is
no longer supported. See ctdb-tunables(7) for details.
A example script to migrate an old-style configuration to the new
style is available in ctdb/doc/examples/config_migrate.sh.
* The following configuration variables and corresponding ctdbd
command-line options have been removed and not replaced with
counterparts in the new configuration scheme:
CTDB_PIDFILE --pidfile
CTDB_SOCKET --socket
CTDB_NODES --nlist
CTDB_PUBLIC_ADDRESSES --public-addresses
CTDB_EVENT_SCRIPT_DIR --event-script-dir
CTDB_NOTIFY_SCRIPT --notification-script
CTDB_PUBLIC_INTERFACE --public-interface
CTDB_MAX_PERSISTENT_CHECK_ERRORS --max-persistent-check-errors
- The compile-time defaults should be used for the first 6 of these.
- Use a symbolic link from the configuration directory to specify a
different location for nodes or public_addresses (e.g. in the
cluster filesystem).
- Executable notification scripts in the notify.d/ subdirectory of
the configuration directory are now run by unconditionally.
- Interfaces for public IP addresses must always be specified in the
public_addresses file using the currently supported format.
Some related items that have been removed are:
- The ctdb command's --socket command-line option
- The ctdb command's CTDB_NODES environment variable
When writing tests there are still mechanisms available to change
the locations of certain directories and files.
* The following ctdbd.conf and ctdbd options have been replaced by new
ctdb.conf options:
CTDB_LOGGING/--logging logging -> location
CTDB_DEBUGLEVEL/-d logging -> log level
CTDB_TRANSPORT/--transport cluster -> transport
CTDB_NODE_ADDRESS/--listen cluster -> node address
CTDB_RECOVERY_LOCK/--reclock cluster -> recovery lock
CTDB_DBDIR/--dbdir database -> volatile database
directory
CTDB_DBDIR_PERSISTENT/--dbdir-persistent database -> peristent database
directory
CTDB_DBDIR_STATE/--dbdir-state database -> state database
directory
CTDB_DEBUG_LOCKS database -> lock debug script
CTDB_DEBUG_HUNG_SCRIPT event -> debug script
CTDB_NOSETSCHED/--nosetsched legacy -> realtime
scheduling
CTDB_CAPABILITY_RECMASTER/--no-recmaster legacy -> recmaster
capability
CTDB_CAPABILITY_LMASTER/--no-lmaster legacy -> lmaster capability
CTDB_START_AS_STOPPED/--start-as-stopped legacy -> start as stopped
CTDB_START_AS_DISABLED/--start-as-disabled legacy -> start as disabled
CTDB_SCRIPT_LOG_LEVEL/--script-log-level legacy -> script log level
* Event scripts have moved to the scripts/legacy subdirectory of the
configuration directory
Event scripts must now end with a ".script" suffix.
* The "ctdb event" command has changed in 2 ways:
- A component is now required for all commands
In this release the only valid component is "legacy".
- There is no longer a default event when running "ctdb event
status"
Listing the status of the "monitor" event is now done via:
ctdb event status legacy monitor
See ctdb(1) for details.
* The following service-related event script options have been
removed:
CTDB_MANAGES_SAMBA
CTDB_MANAGES_WINBIND
CTDB_MANAGES_CLAMD
CTDB_MANAGES_HTTPD
CTDB_MANAGES_ISCSI
CTDB_MANAGES_NFS
CTDB_MANAGES_VSFTPD
CTDB_MANAGED_SERVICES
Event scripts for services are now disabled by default. To enable
an event script and, therefore, manage a service use a command like
the following:
ctdb event script enable legacy 50.samba
* Notification scripts have moved to the scripts/notification
subdirectory of the configuration directory
Notification scripts must now end with a ".script" suffix.
* Support for setting CTDB_DBDIR=tmpfs has been removed
This feature has not been implemented in the new configuration
system. If this is desired then a tmpfs filesystem should be
manually mounted on the directory pointed to by the "volatile
database directory" option. See ctdb.conf(5) for more details.
* The following tunable options are now ctdb.conf options:
DisabledIPFailover failover -> disabled
TDBMutexEnabled database -> tdb mutexes
* Support for the NoIPHostOnAllDisabled tunable has been removed
If all nodes are unhealthy or disabled then CTDB will not host
public IP addresses. That is, CTDB now behaves as if
NoIPHostOnAllDisabled were set to 1.
* The onnode command's CTDB_NODES_FILE environment variable has been
removed
The -f option can still be used to specify an alternate node file.
* The 10.external event script has been removed
* The CTDB_SHUTDOWN_TIMEOUT configuration variable has been removed
As with other daemons, if ctdbd does not shut down when requested
then manual intervention is required. There is no safe way of
automatically killing ctdbd after a failed shutdown.
* CTDB_SUPPRESS_COREFILE and CTDB_MAX_OPEN_FILES configuration
variable have been removed
These should be setup in the systemd unit/system file or, for SYSV
init, in the distribution-specific configuration file for the ctdb
service.
* CTDB_PARTIALLY_ONLINE_INTERFACES incompatibility no longer enforced
11.natgw and 91.lvs will no longer fail if
CTDB_PARTIALLY_ONLINE_INTERFACES=yes. The incompatibility is,
however, well documented. This option will be removed in future and
replaced by sensible behaviour where public IP addresses simply
switch interfaces or become unavailable when interfaces are down.
* Configuration file /etc/ctdb/sysconfig/ctdb is no longer supported
GPO Improvements
----------------
The samba_gpoupdate command (used in applying Group Policies to the
samba machine itself) has been renamed to samba_gpupdate and had the
syntax changed to better match the same tool on Windows.
REMOVED FEATURES
===============
smb.conf changes
===============
As the most popular Samba install platforms (Linux and FreeBSD) both
support extended attributes by default, the parameters "map readonly",
"store dos attributes" and "ea support" have had their
defaults changed
to allow better Windows fileserver compatibility in a default install.
Parameter Name Description Default
-------------- ----------- -------
map readonly Default changed no
store dos attributes Default changed yes
ea support Default changed yes
full_audit:success Default changed none
full_audit:failure Default changed none
VFS interface changes
====================
The VFS ABI interface version has changed to 39. Function changes
are:
SMB_VFS_FSYNC: Removed: Only async versions are used.
SMB_VFS_READ: Removed: Only PREAD or async versions are used.
SMB_VFS_WRITE: Removed: Only PWRITE or async versions are used.
SMB_VFS_CHMOD_ACL: Removed: Only CHMOD is used.
SMB_VFS_FCHMOD_ACL: Removed: Only FCHMOD is used.
Any external VFS modules will need to be updated to match these
changes in order to work with 4.9.x.
CHANGES SINCE 4.9.0rc3
=====================
o Jeremy Allison <jra at samba.org>
* BUG 13585: s3: smbd: Ensure get_real_filename() copes with empty
pathnames.
o Tim Beale <timbeale at catalyst.net.nz>
* BUG 13566: samba domain backup online/rename commands force user to specify
password on CLI.
o Alexander Bokovoy <ab at samba.org>
* BUG 13579: wafsamba/samba_abi: Always hide ABI symbols which must be
local.
o Volker Lendecke <vl at samba.org>
* BUG 13584: Fix a panic if fruit_access_check detects a locking conflict.
o Andreas Schneider <asn at samba.org>
* BUG 13567: Fix memory and resource leaks.
* BUG 13580: python: Fix print in dns_invalid.py.
o Martin Schwenke <martin at meltin.net>
* BUG 13588: Aliasing issue causes incorrect IPv6 checksum.
* BUG 13589: Fix CTDB configuration issues.
o Ralph Wuerthner <ralph.wuerthner at de.ibm.com>
* BUG 13568: s3: vfs: time_audit: fix handling of token_blob in
smb_time_audit_offload_read_recv().
CHANGES SINCE 4.9.0rc2
=====================
o Jeremy Allison <jra at samba.org>
* BUG 13453: CVE-2018-10858: libsmb: Harden smbc_readdir_internal() against
returns from malicious servers.
o Andrew Bartlett <abartlet at samba.org>
* BUG 13374: CVE-2018-1140: ldbsearch '(distinguishedName=abc)' and
DNS query
with escapes crashes, ldb: Release LDB 1.3.5 for CVE-2018-1140
* BUG 13552: CVE-2018-10918: cracknames: Fix DoS (NULL pointer de-ref) when
not servicePrincipalName is set on a user.
o Tim Beale <timbeale at catalyst.net.nz>
* BUG 13434: CVE-2018-10919: acl_read: Fix unauthorized attribute access via
searches.
o Samuel Cabrero <scabrero at suse.de>
* BUG 13540: ctdb_mutex_ceph_rados_helper: Set SIGINT signal handler.
o Günther Deschner <gd at samba.org>
* BUG 13360: CVE-2018-1139 libcli/auth: Do not allow ntlmv1 over SMB1 when it
is disabled via "ntlm auth".
* BUG 13529: s3-tldap: do not install test_tldap.
o David Disseldorp <ddiss at samba.org>
* BUG 13540: ctdb_mutex_ceph_rados_helper: Fix deadlock via lock renewals.
o Andrej Gessel <Andrej.Gessel at janztec.com>
* BUG 13374: CVE-2018-1140 Add NULL check for ldb_dn_get_casefold() in
ltdb_index_dn_attr().
o Amitay Isaacs <amitay at gmail.com>
* BUG 13554: ctdb-eventd: Fix CID 1438155.
o Volker Lendecke <vl at samba.org>
* BUG 13553: Fix CIDs 1438243, (Unchecked return value) 1438244
(Unsigned compared against 0), 1438245 (Dereference before null check) and
1438246 (Unchecked return value).
* BUG 13554: ctdb: Fix a cut&paste error.
o Oleksandr Natalenko <oleksandr at redhat.com>
* BUG 13559: systemd: Only start smb when network interfaces are up.
o Noel Power <noel.power at suse.com>
* BUG 13553: Fix quotas don't work with SMB2.
* BUG 13563: s3/smbd: Ensure quota code is only called when quota support
detected.
o Anoop C S <anoopcs at redhat.com>
* BUG 13204: s3/libsmb: Explicitly set delete_on_close token for rmdir.
o Andreas Schneider <asn at samba.org>
* BUG 13561: s3:waf: Install eventlogadm to /usr/sbin.
o Justin Stephenson <jstephen at redhat.com>
* BUG 13562: Shorten description in vfs_linux_xfs_sgid manual.
CHANGES SINCE 4.9.0rc1
=====================
o Jeremy Allison <jra at samba.org>
* BUG 13537: s3: smbd: Using "sendfile = yes" with SMB2 can cause
CPU spin.
o Ralph Boehme <slow at samba.org>
* BUG 13535: s3: smbd: Fix path check in
smbd_smb2_create_durable_lease_check().
o Alexander Bokovoy <ab at samba.org>
* BUG 13538: samba-tool trust: Support discovery via netr_GetDcName.
* BUG 13542: s4-dsdb: Only build dsdb Python modules for AD DC.
o Amitay Isaacs <amitay at gmail.com>
* BUG 13520: Fix portability issues on freebsd.
o Gary Lockyer <gary at catalyst.net.nz>
* BUG 13536: DNS wildcard search does not handle multiple labels correctly.
o Stefan Metzmacher <metze at samba.org>
* BUG 13308: samba-tool domain trust: Fix trust compatibility to Windows
Server 1709 and FreeIPA.
o Martin Schwenke <martin at meltin.net>
* BUG 13520: Fix portability issues on freebsd.
* BUG 13545: ctdb-protocol: Fix CTDB compilation issues.
* BUG 13546: ctdb-docs: Replace obsolete reference to CTDB_DEBUG_HUNG_SCRIPT
option.
* BUG 13550: ctdb-doc: Provide an example script for migrating old
configuration.
* BUG 13551: ctdb-event: Implement event tool "script list"
command.
KNOWN ISSUES
===========
https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.9#Release_blocking_bugs
#######################################
Reporting bugs & Development Discussion
#######################################
Please discuss this release on the samba-technical mailing list or by
joining the #samba-technical IRC channel on irc.freenode.net.
If you do report problems then please try to send high quality
feedback. If you don't provide vital information to help us track down
the problem then you will probably be ignored. All bug reports should
be filed under the Samba 4.1 and newer product in the project's Bugzilla
database (https://bugzilla.samba.org/).
======================================================================= Our
Code, Our Bugs, Our Responsibility.
== The Samba Team
=====================================================================
===============Download Details
===============
The uncompressed tarballs and patch files have been signed
using GnuPG (ID 6F33915B6568B7EA). The source code can be downloaded
from:
https://download.samba.org/pub/samba/rc/
The release notes are available online at:
https://download.samba.org/pub/samba/rc/samba-4.9.0rc4.WHATSNEW.txt
Our Code, Our Bugs, Our Responsibility.
(https://bugzilla.samba.org/)
--Enjoy
The Samba Team
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