smb2_tcon: avoid STATUS_PENDING responses for tree connect

[Samba.git] / WHATSNEW.txt

                   =============================
                   Release Notes for Samba 4.9.6
                           April 8, 2019
                   =============================


This is a security release in order to address the following defects:

o  CVE-2019-3870 (World writable files in Samba AD DC private/ dir)
o  CVE-2019-3880 (Save registry file outside share as unprivileged user)


=======
Details
=======

o  CVE-2019-3870:
   During the provision of a new Active Directory DC, some files in the private/
   directory are created world-writable.

o  CVE-2019-3880:
   Authenticated users with write permission can trigger a symlink traversal to
   write or detect files outside the Samba share.

For more details and workarounds, please refer to the security advisories.


Changes since 4.9.5:
--------------------

o  Andrew Bartlett <abartlet@samba.org>
   * BUG 13834: CVE-2019-3870: pysmbd: Ensure a zero umask is set for
     smbd.mkdir().

o  Jeremy Allison <jra@samba.org>
   * BUG 13851: CVE-2018-14629: rpc: winreg: Remove implementations of
     SaveKey/RestoreKey.


#######################################
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
======================================================================


Release notes for older releases follow:
----------------------------------------

                   =============================
                   Release Notes for Samba 4.9.5
                           March 12, 2019
                   =============================


Changes since 4.9.4:
--------------------

o  Andrew Bartlett <abartlet@samba.org>
   * BUG 13714: audit_logging: Remove debug log header and JSON Authentication:
     prefix.
   * BUG 13760: Fix upgrade from 4.7 (or earlier) to 4.9.

o  Jeremy Allison <jra@samba.org>
   * BUG 11495: s3: lib: nmbname: Ensure we limit the NetBIOS name correctly.
     CID: 1433607.
   * BUG 13690: smbd: uid: Don't crash if 'force group' is added to an existing
     share connection.
   * BUG 13770: s3: VFS: vfs_fruit. Fix the NetAtalk deny mode compatibility
     code.
   * BUG 13803: s3: SMB1 POSIX mkdir does case insensitive name lookup.

o  Christian Ambach <ambi@samba.org>
   * BUG 13199: s3:utils/smbget fix recursive download with empty source
     directories.

o  Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
   * BUG 13716: samba-tool drs showrepl: Do not crash if no dnsHostName found.

o  Tim Beale <timbeale@catalyst.net.nz>
   * BUG 13736: s3:libsmb: cli_smb2_list() can sometimes fail initially on a
     connection.
   * BUG 13747: join: Throw CommandError instead of Exception for simple errors.
   * BUG 13762: ldb: Avoid inefficient one-level searches.

o  Ralph Boehme <slow@samba.org>
   * BUG 13736: s3: libsmb: use smb2cli_conn_max_trans_size() in
     cli_smb2_list().
   * BUG 13776: tldap: Avoid use after free errors.
   * BUG 13802: Fix idmap xid2sid cache churn.
   * BUG 13812: access_check_max_allowed() doesn't process "Owner Rights" ACEs.

o  Günther Deschner <gd@samba.org>
   * BUG 13720: s3-smbd: Avoid assuming fsp is always intact after close_file
     call.
   * BUG 13725: s3-vfs-fruit: Add close call.
   * BUG 13746: s3-smbd: Use fruit:model string for mDNS registration.
   * BUG 13774: s3-vfs: add glusterfs_fuse vfs module.

o  David Disseldorp <ddiss@samba.org>
   * BUG 13766: printing: Check lp_load_printers() prior to pcap cache update.
   * BUG 13807: vfs_ceph: vfs_ceph strict_allocate_ftruncate calls (local FS)
     ftruncate and fallocate.

o  Philipp Gesang <philipp.gesang@intra2net.com>
   * BUG 13737: lib/audit_logging: Actually create talloc.

o  Joe Guo <joeg@catalyst.net.nz>
   * BUG 13728: netcmd/user: python[3]-gpgme unsupported and replaced by
     python[3]-gpg.

o  Aaron Haslett <aaronhaslett@catalyst.net.nz>
   * BUG 13738: dns: Changing onelevel search for wildcard to subtree.

o  Björn Jacke <bj@sernet.de>
   * BUG 13721: samba-tool: Don't print backtrace on simple DNS errors.
   * BUG 13759: sambaundoguididx: Use the right escaped oder unescaped sam ldb
     files.

o  Volker Lendecke <vl@samba.org>
   * BUG 13742: ctdb: Print locks latency in machinereadable stats.
   * BUG 13786: messages_dgm: Messaging gets stuck when pids are recycled.

o  Gary Lockyer <gary@catalyst.net.nz>
   * BUG 13715: audit_logging: auth_json_audit required auth_json.
   * BUG 13765: man pages: Document prefork process model.
   * BUG 13773: CVE-2019-3824 ldb: Release ldb 1.4.6.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 13697: s3:auth: ignore create_builtin_guests() failing without a valid
     idmap configuration.
   * BUG 13722: s3:auth_winbind: Ignore a missing winbindd as NT4 PDC/BDC
     without trusts.
   * BUG 13723: s3:auth_winbind: return NT_STATUS_NO_LOGON_SERVERS if winbindd
     is not available.
   * BUG 13752: s4:server: Add support for 'smbcontrol samba shutdown' and
     'smbcontrol <pid> debug/debuglevel'.

o  Noel Power <noel.power@suse.com>
   * BUG 13616: Python: Ensure ldb.Dn can doesn't rencoded str with py2.

o  Anoop C S <anoopcs@redhat.com>
   * BUG 13330: vfs_glusterfs: Adapt to changes in libgfapi signatures.
   * BUG 13774: s3-vfs: Use ENOATTR in errno comparison for getxattr.

o  Jiří Šašek <jiri.sasek@oracle.com>
   * BUG 13704: notifyd: Fix SIGBUS on sparc.

o  Christof Schmitt <cs@samba.org>
   * BUG 13787: waf: Check for libnscd.

o  Andreas Schneider <asn@samba.org>
   * BUG 13770: s3:vfs: Correctly check if OFD locks should be enabled or not.

o  Martin Schwenke <martin@meltin.net>
   * BUG 13717: lib/util: Count a trailing line that doesn't end in a newline.
   * BUG 13800: Recovery lock bug fixes.

o  Justin Stephenson <jstephen@redhat.com>
   * BUG 13726: s3: net: Do not set NET_FLAGS_ANONYMOUS with -k.
   * BUG 13727: s3:libsmb: Honor disable_netbios option in smbsock_connect_send.

o  Ralph Wuerthner <ralph.wuerthner@de.ibm.com>
   * BUG 13741: vfs_fileid: Fix get_connectpath_ino.
   * BUG 13744: vfs_fileid: Fix fsname_norootdir algorithm.


#######################################
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
======================================================================


----------------------------------------------------------------------


                   =============================
                   Release Notes for Samba 4.9.4
                          December 20, 2018
                   =============================


Major bug fixes include:
------------------------

   o dns: Fix CNAME loop prevention using counter regression (bug #13600).


Changes since 4.9.3:
--------------------

o  Ralph Boehme <slow@samba.org>
   * BUG 9175: libcli/smb: Don't overwrite status code.
   * BUG 12164: wbinfo --group-info 'NT AUTHORITY\System' does not work.
   * BUG 13661: Session setup reauth fails to sign response.
   * BUG 13677: vfs_fruit: Validation of writes on AFP_AfpInfo stream.
   * BUG 13688: vfs_shadow_copy2: Nicely deal with attempts to open previous
     version for writing.
   * BUG 13455: Restoring previous version of stream with vfs_shadow_copy2 fails
     with NT_STATUS_OBJECT_NAME_INVALID fsp->base_fsp->fsp_name.

o  Isaac Boukris <iboukris@gmail.com>
   * BUG 13571: CVE-2018-16853: Fix S4U2Self crash with MIT KDC build.

o  Günther Deschner <gd@samba.org>
   * BUG 13708: s3-vfs: Prevent NULL pointer dereference in vfs_glusterfs.

o  Joe Guo <joeg@catalyst.net.nz>
   * PEP8: fix E231: missing whitespace after ','.

o  Volker Lendecke <vl@samba.org>
   * BUG 13629: winbindd: Fix crash when taking profiles.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 13600: CVE-2018-14629 dns: Fix CNAME loop prevention using counter
     regression.

o  Garming Sam <garming@catalyst.net.nz>
   * BUG 13686: 'samba-tool user syscpasswords' fails on a domain with many DCs. 

o  Andreas Schneider <asn@samba.org>
   * BUG 13571: CVE-2018-16853: Do not segfault if client is not set.
   * BUG 13679: lib:util: Fix DEBUGCLASS pointer initializiation.

o  Martin Schwenke <martin@meltin.net>
   * BUG 13696: ctdb-daemon: Exit with error if a database directory does not
     exist.

o  Justin Stephenson <jstephen@redhat.com>
   * BUG 13498: s3:libads: Add net ads leave keep-account option.


#######################################
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
======================================================================


----------------------------------------------------------------------


                   =============================
                   Release Notes for Samba 4.9.3
                         November 27, 2018
                   =============================


This is a security release in order to address the following defects:

o  CVE-2018-14629 (Unprivileged adding of CNAME record causing loop in AD
                   Internal DNS server)
o  CVE-2018-16841 (Double-free in Samba AD DC KDC with PKINIT)
o  CVE-2018-16851 (NULL pointer de-reference in Samba AD DC LDAP server)
o  CVE-2018-16852 (NULL pointer de-reference in Samba AD DC DNS servers)
o  CVE-2018-16853 (Samba AD DC S4U2Self crash in experimental MIT Kerberos
                   configuration (unsupported))
o  CVE-2018-16857 (Bad password count in AD DC not always effective)


=======
Details
=======

o  CVE-2018-14629:
   All versions of Samba from 4.0.0 onwards are vulnerable to infinite
   query recursion caused by CNAME loops. Any dns record can be added via
   ldap by an unprivileged user using the ldbadd tool, so this is a
   security issue.

o  CVE-2018-16841:
   When configured to accept smart-card authentication, Samba's KDC will call
   talloc_free() twice on the same memory if the principal in a validly signed
   certificate does not match the principal in the AS-REQ.

   This is only possible after authentication with a trusted certificate.

   talloc is robust against further corruption from a double-free with
   talloc_free() and directly calls abort(), terminating the KDC process.

   There is no further vulnerability associated with this issue, merely a
   denial of service.

o  CVE-2018-16851:
   During the processing of an LDAP search before Samba's AD DC returns
   the LDAP entries to the client, the entries are cached in a single
   memory object with a maximum size of 256MB.  When this size is
   reached, the Samba process providing the LDAP service will follow the
   NULL pointer, terminating the process.

   There is no further vulnerability associated with this issue, merely a
   denial of service.

o  CVE-2018-16852:
   During the processing of an DNS zone in the DNS management DCE/RPC server,
   the internal DNS server or the Samba DLZ plugin for BIND9, if the
   DSPROPERTY_ZONE_MASTER_SERVERS property or DSPROPERTY_ZONE_SCAVENGING_SERVERS
   property is set, the server will follow a NULL pointer and terminate.

   There is no further vulnerability associated with this issue, merely a
   denial of service.

o  CVE-2018-16853:
   A user in a Samba AD domain can crash the KDC when Samba is built in the
   non-default MIT Kerberos configuration.

   With this advisory we clarify that the MIT Kerberos build of the Samba
   AD DC is considered experimental.  Therefore the Samba Team will not
   issue security patches for this configuration.

o  CVE-2018-16857:
   AD DC Configurations watching for bad passwords (to restrict brute forcing
   of passwords) in a window of more than 3 minutes may not watch for bad
   passwords at all.

For more details and workarounds, please refer to the security advisories.


Changes since 4.9.2:
--------------------

o  Andrew Bartlett <abartlet@samba.org>
   * BUG 13628: CVE-2018-16841: heimdal: Fix segfault on PKINIT with
     mis-matching principal.
   * BUG 13678: CVE-2018-16853: build: The Samba AD DC, when build with MIT
     Kerberos is experimental

o  Tim Beale <timbeale@catalyst.net.nz>
   * BUG 13683: CVE-2018-16857: dsdb/util: Correctly treat
     lockOutObservationWindow as 64-bit int.

o  Joe Guo <joeg@catalyst.net.nz>
   * BUG 13683: CVE-2018-16857 PEP8: Fix E305: Expected 2 blank lines after
     class or function definition, found 1.

o  Aaron Haslett <aaronhaslett@catalyst.net.nz>
   * BUG 13600: CVE-2018-14629: dns: CNAME loop prevention using counter.

o  Gary Lockyer <gary@catalyst.net.nz>
   * BUG 13669: CVE-2018-16852: Fix NULL pointer de-reference in Samba AD DC
     DNS management.

o  Garming Sam <garming@catalyst.net.nz>
   * BUG 13674: CVE-2018-16851: ldap_server: Check ret before manipulating blob.


#######################################
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
======================================================================


----------------------------------------------------------------------


                   =============================
                   Release Notes for Samba 4.9.2
                         November 08, 2018
                   =============================


This is the latest stable release of the Samba 4.9 release series.


Changes since 4.9.1:
--------------------

o  Andrew Bartlett <abartlet@samba.org>
   * BUG 13418: dsdb: Add comments explaining the limitations of our current
     backlink behaviour.
   * BUG 13621: Fix problems running domain backups (handling SMBv2, sites).

o  Tim Beale <timbeale@catalyst.net.nz>
   * BUG 13621: Fix problems running domain backups (handling SMBv2, sites).

o  Ralph Boehme <slow@samba.org>
   * BUG 13465: testparm: Fix crashes with PANIC: Messaging not initialized on
     SLES 12 SP3.
   * BUG 13642: Make vfs_fruit able to cleanup AppleDouble files.
   * BUG 13646: File saving issues with vfs_fruit on samba >= 4.8.5.
   * BUG 13649: Enabling vfs_fruit looses FinderInfo.
   * BUG 13667: Cancelling of SMB2 aio reads and writes returns wrong error
     NT_STATUS_INTERNAL_ERROR.

o  Amitay Isaacs <amitay@gmail.com>
   * BUG 13641: Fix CTDB recovery record resurrection from inactive nodes and
     simplify vacuuming.

o  Volker Lendecke <vl@samba.org>
   * BUG 13465: examples: Fix the smb2mount build.
   * BUG 13629: libtevent: Fix build due to missing open_memstream on Illiumos.
   * BUG 13662: winbindd_cache: Fix timeout calculation for sid<->name cache.

o  Gary Lockyer <gary@catalyst.net.nz>
   * BUG 13653: dsdb encrypted_secrets: Allow "ldb:// and "mdb://" in file path.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 13418: Extended DN SID component missing for member after switching
     group membership.
   * BUG 13624: Return STATUS_SESSION_EXPIRED error encrypted, if the request
     was encrypted.

o  David Mulder <dmulder@suse.com>
   * BUG 13621: python: Allow forced signing via smb.SMB().
   * BUG 13665: lib:socket: If returning early, set ifaces.

o  Noel Power <noel.power@suse.com>
   * BUG 13616: ldb: Bump ldb version to 1.4.3, Python: Ensure ldb.Dn can accept
     utf8 encoded unicode.

o  Christof Schmitt <cs@samba.org>
   * BUG 13465: testparm: Fix crashes with PANIC: Messaging not initialized on
     SLES 12 SP3.
   * BUG 13673: smbd: Fix DELETE_ON_CLOSE behaviour on files with READ_ONLY
     attribute.

o  Andreas Schneider <asn@samba.org>
   * BUG 13601: waf: Add -fstack-clash-protection.
   * BUG 13668: winbind: Fix segfault if an invalid passdb backend is
     configured.

o  Martin Schwenke <martin@meltin.net>
   * BUG 13659: Fix bugs in CTDB event handling.
   * BUG 13670: Misbehaving nodes are sometimes not banned.


#######################################
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
======================================================================


----------------------------------------------------------------------


                   =============================
                   Release Notes for Samba 4.9.1
                         September 24, 2018
                   =============================


This is the latest stable release of the Samba 4.9 release series.


Major enhancements include:
---------------------------

   o  s3: nmbd: Stop nmbd network announce storm (bug #13620).


Changes since 4.9.0:
--------------------

o  Andrew Bartlett <abartlet@samba.org>
   * BUG 13620: s3: nmbd: Stop nmbd network announce storm.

o  Günther Deschner <gd@samba.org>
   * BUG 13597: s3-rpcclient: Use spoolss_init_spoolss_UserLevel1 in winspool
     cmds.

o  Martin Schwenke <martin@meltin.net>
   * BUG 13617: CTDB recovery lock has some race conditions.

o  Justin Stephenson <jstephen@redhat.com>
   * BUG 13597: s3-rpc_client: Advertise Windows 7 client info.

o  Ralph Wuerthner <ralph.wuerthner@de.ibm.com>
   * BUG 13610: ctdb-doc: Remove PIDFILE option from ctdbd_wrapper man page.


#######################################
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
======================================================================


----------------------------------------------------------------------


                   =============================
                   Release Notes for Samba 4.9.0
                        September 13, 2018
                   =============================


This is the first stable release of the Samba 4.9 release series.
Please read the release notes carefully before 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 getting the initial ticket granting ticket.

VFS audit modules
-----------------

The vfs_full_audit module has changed its 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' subcommand 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.

New 'samba-tool ou' command
---------------------------

The new 'samba-tool ou' command allows to manage organizational units.

Available subcommands are:
  create       - Create an organizational unit.
  delete       - Delete an organizational unit.
  list         - List all organizational units
  listobjects  - List all objects in an organizational unit.
  move         - Move an organizational unit.
  rename       - Rename an organizational unit.

In addition to the ou commands, there are new subcommands for the user
and group management, which can make use of the organizational units:
  group move   - Move a group to an organizational unit/container.
  user move    - Move a user to an organizational unit/container.
  user show    - Display a user AD object.

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".

Improved support for trusted domains (as AD DC)
-----------------------------------------------

The support for trusted domains/forests has been further improved.

External domain trusts, as well a transitive forest trusts,
are supported in both directions (inbound and outbound)
for Kerberos and NTLM authentication.

The following features are new in 4.9 (compared to 4.8):

- It's now possible to add users/groups of a trusted domain
  into domain groups. The group memberships are expanded
  on trust boundaries.
- foreignSecurityPrincipal objects (FPO) are now automatically
  created when members (as SID) of a trusted domain/forest
  are added to a group.
- The 'samba-tool group *members' commands allow
  members to be specified as foreign SIDs.

However there are currently still a few limitations:

- Both sides of the trust need to fully trust each other!
- No SID filtering rules are applied at all!
- This means DCs of domain A can grant domain admin rights
  in domain B.
- Selective (CROSS_ORGANIZATION) authentication is
  not supported. It's possible to create such a trust,
  but the KDC and winbindd ignore them.
- Samba can still only operate in a forest with just
  one single domain.

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.

New glusterfs_fuse VFS module
-----------------------------

The new vfs_glusterfs_fuse module improves performance when Samba
accesses a glusterfs volume mounted via FUSE (Filesystem in Userspace
as part of the Linux kernel). It achieves that by leveraging a
mechanism to retrieve the appropriate case of filenames by querying a
specific extended attribute in the filesystem. No extra configuration
is required to use this module, only glusterfs_fuse needs to be set in
the "vfs objects" parameter. Further details can be found in the
vfs_glusterfs_fuse(8) manpage. This new vfs_glusterfs_fuse module does
not replace the existing vfs_glusterfs module, it just provides an
additional, alternative mechanism to access a Gluster volume.

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 4.9.0rc5
======================

o  Björn Baumbach <bb@sernet.de>
   * BUG 13605: samba_dnsupdate: Honor 'dns zone scavenging' option, only
     update if needed.

o  Andreas Schneider <asn@samba.org>
   * BUG 13606: wafsamba: Fix 'make -j<jobs>'.
o
CHANGES SINCE 4.9.0rc4
======================

o  Jeremy Allison <jra@samba.org>
   * BUG 13565: s3: VFS: vfs_full_audit: Ensure smb_fname_str_do_log() only
     returns absolute pathnames.

o  Paulo Alcantara <paulo@paulo.ac>
   * BUG 13578: s3: util: Do not take over stderr when there is no log file.

o  Ralph Boehme <slow@samba.org>
   * BUG 13549: Durable Reconnect fails because cookie.allow_reconnect is not
     set.

o  Alexander Bokovoy <ab@samba.org>
   * BUG 13539: krb5-samba: Interdomain trust uses different salt principal.

o  Volker Lendecke <vl@samba.org>
   * BUG 13441: vfs_fruit: Don't unlink the main file.
   * BUG 13602: smbd: Fix a memleak in async search ask sharemode.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 11517: Fix Samba GPO issue when Trust is enabled.
   * BUG 13539: samba-tool: Add "virtualKerberosSalt" attribute to
     'user getpassword/syncpasswords'.

o  Martin Schwenke <martin@meltin.net>
   * BUG 13589: Fix CTDB configuration issues.
   * BUG 13592: ctdbd logs an error until it can successfully connect to
     eventd.


CHANGES SINCE 4.9.0rc3
======================

o  Jeremy Allison <jra@samba.org>
   * BUG 13585: s3: smbd: Ensure get_real_filename() copes with empty
     pathnames.

o  Tim Beale <timbeale@catalyst.net.nz>
   * BUG 13566: samba domain backup online/rename commands force user to specify
     password on CLI.

o  Alexander Bokovoy <ab@samba.org>
   * BUG 13579: wafsamba/samba_abi: Always hide ABI symbols which must be
     local.

o  Volker Lendecke <vl@samba.org>
   * BUG 13584: Fix a panic if fruit_access_check detects a locking conflict.

o  Andreas Schneider <asn@samba.org>
   * BUG 13567: Fix memory and resource leaks.
   * BUG 13580: python: Fix print in dns_invalid.py.

o  Martin Schwenke <martin@meltin.net>
   * BUG 13588: Aliasing issue causes incorrect IPv6 checksum.
   * BUG 13589: Fix CTDB configuration issues.

o  Ralph Wuerthner <ralph.wuerthner@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@samba.org>
   * BUG 13453: CVE-2018-10858: libsmb: Harden smbc_readdir_internal() against
     returns from malicious servers.

o  Andrew Bartlett <abartlet@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@catalyst.net.nz>
   * BUG 13434: CVE-2018-10919: acl_read: Fix unauthorized attribute access via
     searches.

o  Samuel Cabrero <scabrero@suse.de>
   * BUG 13540: ctdb_mutex_ceph_rados_helper: Set SIGINT signal handler.

o  Günther Deschner <gd@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@samba.org>
   * BUG 13540: ctdb_mutex_ceph_rados_helper: Fix deadlock via lock renewals.

o  Andrej Gessel <Andrej.Gessel@janztec.com>
   * BUG 13374: CVE-2018-1140 Add NULL check for ldb_dn_get_casefold() in
     ltdb_index_dn_attr().

o  Amitay Isaacs <amitay@gmail.com>
   * BUG 13554: ctdb-eventd: Fix CID 1438155.

o  Volker Lendecke <vl@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@redhat.com>
   * BUG 13559: systemd: Only start smb when network interfaces are up.

o  Noel Power <noel.power@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@redhat.com>
   * BUG 13204: s3/libsmb: Explicitly set delete_on_close token for rmdir.

o  Andreas Schneider <asn@samba.org>
   * BUG 13561: s3:waf: Install eventlogadm to /usr/sbin.

o  Justin Stephenson <jstephen@redhat.com>
   * BUG 13562: Shorten description in vfs_linux_xfs_sgid manual.


CHANGES SINCE 4.9.0rc1
======================

o  Jeremy Allison <jra@samba.org>
   * BUG 13537: s3: smbd:  Using "sendfile = yes" with SMB2 can cause CPU spin.

o  Ralph Boehme <slow@samba.org>
   * BUG 13535: s3: smbd: Fix path check in
     smbd_smb2_create_durable_lease_check().

o  Alexander Bokovoy <ab@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@gmail.com>
   * BUG 13520: Fix portability issues on freebsd.

o  Gary Lockyer <gary@catalyst.net.nz>
   * BUG 13536: DNS wildcard search does not handle multiple labels correctly.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 13308: samba-tool domain trust: Fix trust compatibility to Windows
     Server 1709 and FreeIPA.

o  Martin Schwenke <martin@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
======================================================================