Samba 4.2.0 Available for Download

============================= Release Notes for Samba 4.2.0 March 04, 2015 ============================= This is is the first stable release of Samba 4.2. Samba 4.2 will be the next version of the Samba suite. Samba User Survey 2015 ====================== https://www.surveygizmo.com/s3/2020369/Samba-User-Survey-2015 Please take our survey. It will help us improve Samba by understanding your knowledge and needs. The survey runs until end of March 2015 and won't ask for any personal info. The full results will be shared with the Samba Team, and statistical summaries will be shared with the Samba community after the SambaXP conference (http://sambaxp.org). IMPORTANT NOTE ABOUT THE SUPPORT END OF SAMBA 3 ================================================= With the final release of Samba 4.2, the last series of Samba 3 has been discontinued! People still running 3.6.x or earlier,should consider moving to a more recent and maintained version (4.0 - 4.2). One of the common misconceptions is that Samba 4.x automatically means "Active Directory only": This is wrong! Acting as an Active Directory Domain Controller is just one of the enhancements included in Samba 4.0 and later. Version 4.0 was just the next release after the 3.6 series and contains all the features of the previous ones - including the NT4-style (classic) domain support. This means you can update a Samba 3.x NT4-style PDC to 4.x, just as you've updated in the past (e.g. from 3.4.x to 3.5.x). You don't have to move your NT4-style domain to an Active Directory! And of course the possibility remains unchanged, to setup a new NT4-style PDC with Samba 4.x, like done in the past (e.g. with openLDAP backend). Active Directory support in Samba 4 is additional and does not replace any of these features. We do understand the difficulty presented by existing LDAP structures and for that reason there isn't a plan to decommission the classic PDC support. It remains tested by the continuous integration system. The code that supports the classic Domain Controller is also the same code that supports the internal 'Domain' of standalone servers and Domain Member Servers. This means that we still use this code, even when not acting as an AD Domain Controller. It is also the basis for some of the features of FreeIPA and so it gets development attention from that direction as well. UPGRADING ========= Read the "Winbindd/Netlogon improvements" section (below) carefully! NEW FEATURES ============ Transparent File Compression ============================ Samba 4.2.0 adds support for the manipulation of file and folder compression flags on the Btrfs filesystem. With the Btrfs Samba VFS module enabled, SMB2+ compression flags can be set remotely from the Windows Explorer File->Properties->Advanced dialog. Files flagged for compression are transparently compressed and uncompressed when accessed or modified. Previous File Versions with Snapper =================================== The newly added Snapper VFS module exposes snapshots managed by Snapper for use by Samba. This provides the ability for remote clients to access shadow-copies via Windows Explorer using the "previous versions" dialog. Winbindd/Netlogon improvements ============================== The whole concept of maintaining the netlogon secure channel to (other) domain controllers was rewritten in order to maintain global state in a netlogon_creds_cli.tdb. This is the proper fix for a large number of bugs: https://bugzilla.samba.org/show_bug.cgi?id=6563 https://bugzilla.samba.org/show_bug.cgi?id=7944 https://bugzilla.samba.org/show_bug.cgi?id=7945 https://bugzilla.samba.org/show_bug.cgi?id=7568 https://bugzilla.samba.org/show_bug.cgi?id=8599 In addition a strong session key is now required by default, which means that communication to older servers or clients might be rejected by default. For the client side we have the following new options: "require strong key" (yes by default), "reject md5 servers" (no by default). E.g. for Samba 3.0.37 you need "require strong key = no" and for NT4 DCs you need "require strong key = no" and "client NTLMv2 auth = no", On the server side (as domain controller) we have the following new options: "allow nt4 crypto" (no by default), "reject md5 client" (no by default). E.g. in order to allow Samba < 3.0.27 or NT4 members to work you need "allow nt4 crypto = yes" winbindd does not list group memberships for display purposes (e.g. getent group ) anymore by default. The new default is "winbind expand groups = 0" now, the reason for this is the same as for "winbind enum users = no" and "winbind enum groups = no". Providing this information is not always reliably possible, e.g. if there are trusted domains. Please consult the smb.conf manpage for more details on these new options. Winbindd use on the Samba AD DC =============================== Winbindd is now used on the Samba AD DC by default, replacing the partial rewrite used for winbind operations in Samba 4.0 and 4.1. This allows more code to be shared, more options to be honoured, and paves the way for support for trusted domains in the AD DC. If required the old internal winbind can be activated by setting 'server services = +winbind -winbindd'. Upgrading users with a server services parameter specified should ensure they change 'winbind' to 'winbindd' to obtain the new functionality. The 'samba' binary still manages the starting of this service, there is no need to start the winbindd binary manually. Winbind now requires secured connections ======================================== To improve protection against rogue domain controllers we now require that when we connect to an AD DC in our forest, that the connection be signed using SMB Signing. Set 'client signing = off' in the smb.conf to disable. Also and DCE/RPC pipes must be sealed, set 'require strong key = false' and 'winbind sealed pipes = false' to disable. Finally, the default for 'client ldap sasl wrapping' has been set to 'sign', to ensure the integrity of LDAP connections. Set 'client ldap sasl wrapping = plain' to disable. Larger IO sizes for SMB2/3 by default ===================================== The default values for "smb2 max read", "smb2 max write" and "smb2 max trans" have been changed to 8388608 (8MiB) in order to match the default of Windows 2012R2. SMB2 leases =========== The SMB2 protocol allows clients to aggressively cache files locally above and beyond the caching allowed by SMB1 and SMB2 oplocks. Called SMB2 leases, this can greatly reduce traffic on an SMB2 connection. Samba 4.2 now implements SMB2 leases. It can be turned on by setting the parameter "smb2 leases = yes" in the [global] section of your smb.conf. This parameter is set to off by default until the SMB2 leasing code is declared fully stable. Improved DCERPC man in the middle detection =========================================== The DCERPC header signing has been implemented in addition to the dcerpc_sec_verification_trailer protection. Overhauled "net idmap" command ============================== The command line interface of the "net idmap" command has been made systematic, and subcommands for reading and writing the autorid idmap database have been added. Note that the writing commands should be used with great care. See the net(8) manual page for details. tdb improvements ================ The tdb library, our core mechanism to store Samba-specific data on disk and share it between processes, has been improved to support process shared robust mutexes on Linux. These mutexes are available on Linux and Solaris and significantly reduce the overhead involved with tdb. To enable mutexes for tdb, set dbwrap_tdb_mutexes:* = yes in the [global] section of your smb.conf. Tdb file space management has also been made more efficient. This will lead to smaller and less fragmented databases. Messaging improvements ====================== Our internal messaging subsystem, used for example for things like oplock break messages between smbds or setting a process debug level dynamically, has been rewritten to use unix domain datagram messages. Clustering support ================== Samba's file server clustering component CTDB is now integrated in the Samba tree. This avoids the confusion of compatibility of Samba and CTDB versions as existed previously. To build the Samba file server with cluster support, use the configure command line option --with-cluster-support. This will build clustered file server against the in-tree CTDB and will also build CTDB. Building clustered samba with previous versions of CTDB is no longer supported. Samba Registry Editor ===================== The utitlity to browse the samba registry has been overhauled by our Google Summer of Code student Chris Davis. Now samba-regedit has a Midnight-Commander-like theme and UI experience. You can browse keys and edit the diffent value types. For a data value type a hexeditor has been implemented. Bad Password Lockout in the AD DC ================================= Samba's AD DC now implements bad password lockout (on a per-DC basis). That is, incorrect password attempts are tracked, and accounts locked out if too many bad passwords are submitted. There is also a grace period of 60 minutes on the previous password when used for NTLM authentication (matching Windows 2003 SP1: https://support2.microsoft.com/kb/906305). The relevant settings can be seen using 'samba-tool domain passwordsettings show' (the new settings being highlighted): Password informations for domain 'DC=samba,DC=example,DC=com' Password complexity: on Store plaintext passwords: off Password history length: 24 Minimum password length: 7 Minimum password age (days): 1 Maximum password age (days): 42 * Account lockout duration (mins): 30 * * Account lockout threshold (attempts): 0 * * Reset account lockout after (mins): 30 * These values can be set using 'samba-tool domain passwordsettings set'. Correct defaults in the smb.conf manpages ========================================= The default values for smb.conf parameters are now correctly specified in the smb.conf manpage, even when they refer to build-time specified paths. Provided Samba is built on a system with the right tools (xsltproc in particular) required to generate our man pages, then these will be built with the exact same embedded paths as used by the configuration parser at runtime. Additionally, the default values read from the smb.conf manpage are checked by our test suite to match the values seen in testparm and used by the running binaries. Consistent behaviour between samba-tool testparm and testparm ============================================================= With the exception of the registry backend, which remains only available in the file server, the behaviour of the smb.conf parser and the tools 'samba-tool testparm' and 'testparm' is now consistent, particularly with regard to default values. Except with regard to registry shares, it is no longer needed to use one tool on the AD DC, and another on the file server. VFS WORM module =============== A VFS module for basic WORM (Write once read many) support has been added. It allows an additional layer on top of a Samba share, that provides a basic set of WORM functionality on the client side, to control the writeability of files and folders. As the module is simply an additional layer, share access and permissions work like expected - only WORM functionality is added on top. Removing the module from the share configuration, removes this layer again. The filesystem ACLs are not affected in any way from the module and treated as usual. The module does not provide complete WORM functions, like some archiving products do! It is not audit-proof, because the WORM function is only available on the client side, when accessing a share through SMB! If the same folder is shared by other services like NFS, the access only depends on the underlying filesystem ACLs. Equally if you access the content directly on the server. For additional information, see https://wiki.samba.org/index.php/VFS/vfs_worm vfs_fruit, a VFS module for OS X clients ======================================== A new VFS module that provides enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver. The module features enhanced performance with reliable named streams support, interoperability with special characters commonly used by OS X client (eg '*', '/'), integrated file locking and Mac metadata access with Netatalk 3 and enhanced performance by implementing Apple's SMB2 extension codenamed "AAPL". The modules behaviour is fully configurable, please refer to the manpage vfs_fruit for further details. smbclient archival improvements =============================== Archive creation and extraction support in smbclient has been rewritten to use libarchive. This fixes a number of outstanding bugs in Samba's previous custom tar implementation and also adds support for the extraction of zipped archives. smbclient archive support can be enabled or disabled at build time with corresponding --with[out]-libarchive configure parameters. ###################################################################### Changes ####### smb.conf changes ---------------- Parameter Name Description Default -------------- ----------- ------- allow nt4 crypto New no neutralize nt4 emulation New no reject md5 client New no reject md5 servers New no require strong key New yes smb2 max read Changed default 8388608 smb2 max write Changed default 8388608 smb2 max trans Changed default 8388608 winbind expand groups Changed default 0 CHANGES SINCE 4.2.0rc5 ====================== o Michael Adam <obnox@samba.org> * BUG 11117: doc:man:vfs_glusterfs: improve the configuration section. o Jeremy Allison <jra@samba.org> * BUG 11118: tevent: Ignore unexpected signal events in the same way the epoll backend does. o Andrew Bartlett <abartlet@samba.org> * BUG 11100: debug: Set close-on-exec for the main log file FD. * BUG 11097: Fix Win8.1 Credentials Manager issue after KB2992611 on Samba domain. o Ira Cooper <ira@samba.org> * BUG 1115: smbd: Stop using vfs_Chdir after SMB_VFS_DISCONNECT. o Günther Deschner <gd@samba.org> * BUG 11088: vfs: Add a brief vfs_ceph manpage. o David Disseldorp <ddiss@samba.org> * BUG 11118: tevent: version 0.9.24. o Amitay Isaacs <amitay@gmail.com> * BUG 11124: ctdb-io: Do not use sys_write to write to client sockets. o Volker Lendecke <vl@samba.org> * BUG 11119: snprintf: Try to support %j. o Garming Sam <garming@catalyst.net.nz> * BUG 11097: Fix Win8.1 Credentials Manager issue after KB2992611 on Samba domain. o Andreas Schneider <asn@samba.org> * BUG 11127: doc-xml: Add 'sharesec' reference to 'access based share enum'. CHANGES SINCE 4.2.0rc4 ====================== o Michael Adam <obnox@samba.org> * BUG 11032: Enable mutexes in gencache_notrans.tdb. * BUG 11058: cli_connect_nb_send: Don't segfault on host == NULL. o Jeremy Allison <jra@samba.org> * BUG 10849: s3: lib, s3: modules: Fix compilation on Solaris. * BUG 11044: Fix authentication using Kerberos (not AD). * BUG 11077: CVE-2015-0240: s3: netlogon: Ensure we don't call talloc_free on an uninitialized pointer. * BUG 11094: s3: smbclient: Allinfo leaves the file handle open. * BUG 11102: s3: smbd: leases - losen paranoia check. Stat opens can grant leases. * BUG 11104: s3: smbd: SMB2 close. If a file has delete on close, store the return info before deleting. o Ira Cooper <ira@samba.org> * BUG 11069: vfs_glusterfs: Add comments to the pipe(2) code. o Günther Deschner <gd@samba.org> * BUG 11070: s3-vfs: Fix developer build of vfs_ceph module. o David Disseldorp <ddiss@samba.org> * BUG 10808: printing/cups: Pack requested-attributes with IPP_TAG_KEYWORD. * BUG 11055: vfs_snapper: Correctly handles multi-byte DBus strings. * BUG 11059: libsmb: Provide authinfo domain for encrypted session referrals. o Poornima G <pgurusid@redhat.com> * BUG 11069: vfs_glusterfs: Implement AIO support. o Volker Lendecke <vl@samba.org> * BUG 11032: Enable mutexes in gencache_notrans.tdb. o Stefan Metzmacher <metze@samba.org> * BUG 9299: nsswitch: Fix soname of linux nss_*.so.2 modules. * BUG 9702: s3:smb2_server: protect against integer wrap with "smb2 max credits = 65535". * BUG 9810: Make validate_ldb of String(Generalized-Time) accept millisecond format ".000Z". * BUG 10112: Use -R linker flag on Solaris, not -rpath. o Marc Muehlfeld <mmuehlfeld@samba.org> * BUG 10909: samba-tool: Create NIS enabled users and unixHomeDirectory attribute. o Garming Sam <garming@catalyst.net.nz> * BUG 11022: Make Sharepoint search show user documents. o Christof Schmitt <cs@samba.org> * BUG 11032: Enable mutexes in gencache_notrans.tdb. o Andreas Schneider <asn@samba.org> * BUG 11058: utils: Fix 'net time' segfault. * BUG 11066: s3-pam_smbpass: Fix memory leak in pam_sm_authenticate(). * BUG 11077: CVE-2015-0240: s3-netlogon: Make sure we do not deference a NULL pointer. o Raghavendra Talur <raghavendra.talur@gmail.com> * BUG 11069: vfs/glusterfs: Change xattr key to match gluster key. CHANGES SINCE 4.2.0rc3 ====================== o Andrew Bartlett <abartlet@samba.org> * BUG 10993: CVE-2014-8143: dsdb-samldb: Check for extended access rights before we allow changes to userAccountControl. o Günther Deschner <gd@samba.org> * BUG 10240: vfs: Add glusterfs manpage. o David Disseldorp <ddiss@samba.org> * BUG 10984: Fix spoolss IDL response marshalling when returning error without clearing info. o Amitay Isaacs <amitay@gmail.com> * BUG 11000: ctdb-daemon: Use correct tdb flags when enabling robust mutex support. o Volker Lendecke <vl@samba.org> * BUG 11032: tdb_wrap: Make mutexes easier to use. * BUG 11039: vfs_fruit: Fix base_fsp name conversion. * BUG 11040: vfs_fruit: mmap under FreeBSD needs PROT_READ. * BUG 11051: net: Fix sam addgroupmem. o Stefan Metzmacher <metze@samba.org> * BUG 10940: s3:passdb: fix logic in pdb_set_pw_history(). * BUG 11004: tdb: version 1.3.4. o Christof Schmitt <cs@samba.org> * BUG 11034: winbind: Retry after SESSION_EXPIRED error in ping-dc. o Andreas Schneider <asn@samba.org> * BUG 11008: s3-util: Fix authentication with long hostnames. * BUG 11026: nss_wrapper: check for nss.h. * BUG 11033: lib/util: Avoid collision which alread defined consumer DEBUG macro. * BUG 11037: s3-libads: Fix a possible segfault in kerberos_fetch_pac(). CHANGES SINCE 4.2.0rc2 ====================== o Michael Adam <obnox@samba.org> * BUG 10892: Integrate CTDB into top-level Samba build. o Jeremy Allison <jra@samba.org> * BUG 10851: lib: uid_wrapper: Fix setgroups and syscall detection on a system without native uid_wrapper library. * BUG 10896: s3-nmbd: Fix netbios name truncation. * BUG 10904: Fix smbclient loops doing a directory listing against Mac OS X 10 server with a non-wildcard path. * BUG 10911: Add support for SMB2 leases. * BUG 10920: s3: nmbd: Ensure NetBIOS names are only 15 characters stored. * BUG 10966: libcli: SMB2: Pure SMB2-only negprot fix to make us behave as a Windows client does. * BUG 10982: s3: smbd: Fix *allocate* calls to follow POSIX error return convention. o Christian Ambach <ambi@samba.org> * BUG 9629: Make 'profiles' work again. o Björn Baumbach <bb@sernet.de> * BUG 11014: ctdb-build: Fix build without xsltproc. o Ralph Boehme <slow@samba.org> * BUG 10834: Don't build vfs_snapper on FreeBSD. * BUG 10971: vfs_streams_xattr: Check stream type. * BUG 10983: vfs_fruit: Add support for AAPL. * BUG 11005: vfs_streams_xattr: Add missing call to SMB_VFS_NEXT_CONNECT. o Günther Deschner <gd@samba.org> * BUG 9056: pam_winbind: fix warn_pwd_expire implementation. * BUG 10942: Cleanup add_string_to_array and usage. o David Disseldorp <ddiss@samba.org> * BUG 10898: spoolss: Fix handling of bad EnumJobs levels. * BUG 10905: Fix print job enumeration. o Amitay Isaacs <amitay@gmail.com> * BUG 10620: s4-dns: Add support for BIND 9.10. * BUG 10892: Integrate CTDB into top-level Samba build. * BUG 10996: Fix IPv6 support in CTDB. * BUG 11014: packaging: Include CTDB man pages in the tarball. o Björn Jacke <bj@sernet.de> * BUG 10835: nss_winbind: Add getgroupmembership for FreeBSD. o Guenter Kukkukk <linux@kukkukk.com> * BUG 10952: Fix 'samba-tool dns serverinfo <server>' for IPv6. o Volker Lendecke <vl@samba.org> * BUG 10932: pdb_tdb: Fix a TALLOC/SAFE_FREE mixup. * BUG 10942: dbwrap_ctdb: Pass on mutex flags to tdb_open. o Justin Maggard <jmaggard10@gmail.com> * BUG 10852: winbind3: Fix pwent variable substitution. o Kamen Mazdrashki <kamenim@samba.org> * BUG 10975: ldb: version 1.1.18 o Stefan Metzmacher <metze@samba.org> * BUG 10781: tdb: version 1.3.3 * BUG 10911: Add support for SMB2 leases. * BUG 10921: s3:smbd: Fix file corruption using "write cache size != 0". * BUG 10949: Fix RootDSE search with extended dn control. * BUG 10958: libcli/smb: only force signing of smb2 session setups when binding a new session. * BUG 10975: ldb: version 1.1.18 * BUG 11016: pdb_get_trusteddom_pw() fails with non valid UTF16 random passwords. o Marc Muehlfeld <mmuehlfeld@samba.org> * BUG 10895: samba-tool group add: Add option '--nis-domain' and '--gid'. o Noel Power <noel.power@suse.com> * BUG 10918: btrfs: Don't leak opened directory handle. o Matt Rogers <mrogers@redhat.com> * BUG 10933: s3-keytab: fix keytab array NULL termination. o Garming Sam <garming@catalyst.net.nz> * BUG 10355: pdb: Fix build issues with shared modules. * BUG 10720: idmap: Return the correct id type to *id_to_sid methods. * BUG 10864: Fix testparm to show hidden share defaults. o Andreas Schneider <asn@samba.org> * BUG 10279: Make 'smbclient' use cached creds. * BUG 10960: s3-smbclient: Return success if we listed the shares. * BUG 10961: s3-smbstatus: Fix exit code of profile output. * BUG 10965: socket_wrapper: Add missing prototype check for eventfd. o Martin Schwenke <martin@meltin.net> * BUG 10892: Integrate CTDB into top-level Samba build. * BUG 10996: Fix IPv6 support in CTDB. CHANGES SINCE 4.2.0rc1 ====================== o Jeremy Allison <jra@samba.org> * BUG 10848: s3: smb2cli: query info return length check was reversed. o Björn Baumbach <bb@sernet.de> * BUG 10862: build: Do not install 'texpect' binary anymore. o Chris Davis <cd.rattan@gmail.com> * BUG 10859: Improve samba-regedit. o Jakub Hrozek <jakub.hrozek@gmail.com> * BUG 10861: Fix build of socket_wrapper on systems without SO_PROTOCOL. o Volker Lendecke <vl@samba.org> * BUG 10860: registry: Don't leave dangling transactions. o Stefan Metzmacher <metze@samba.org> * BUG 10866: libcli/smb: Fix smb2cli_validate_negotiate_info with min=PROTOCOL_NT1 max=PROTOCOL_SMB2_02. o Christof Schmitt <cs@samba.org> * BUG 10837: idmap_rfc2307: Fix a crash after connection problem to DC.