1 =============================
2 Release Notes for Samba 4.1.3
4 =============================
7 This is a security release in order to address
8 CVE-2013-4408 (DCE-RPC fragment length field is incorrectly checked) and
9 CVE-2012-6150 (pam_winbind login without require_membership_of restrictions).
12 Samba versions 3.4.0 and above (versions 3.4.0 - 3.4.17, 3.5.0 -
13 3.5.22, 3.6.0 - 3.6.21, 4.0.0 - 4.0.12 and including 4.1.2) are
14 vulnerable to buffer overrun exploits in the client processing of
15 DCE-RPC packets. This is due to incorrect checking of the DCE-RPC
16 fragment length in the client code.
18 This is a critical vulnerability as the DCE-RPC client code is part of
19 the winbindd authentication and identity mapping daemon, which is
20 commonly configured as part of many server installations (when joined
21 to an Active Directory Domain). A malicious Active Directory Domain
22 Controller or man-in-the-middle attacker impersonating an Active
23 Directory Domain Controller could achieve root-level access by
24 compromising the winbindd process.
26 Samba server versions 3.4.0 - 3.4.17 and versions 3.5.0 - 3.5.22 are
27 also vulnerable to a denial of service attack (server crash) due to a
28 similar error in the server code of those versions.
30 Samba server versions 3.6.0 and above (including all 3.6.x versions,
31 all 4.0.x versions and 4.1.x) are not vulnerable to this problem.
33 In addition range checks were missing on arguments returned from calls
34 to the DCE-RPC functions LookupSids (lsa and samr), LookupNames (lsa and samr)
35 and LookupRids (samr) which could also cause similar problems.
37 As this was found during an internal audit of the Samba code there are
38 no currently known exploits for this problem (as of December 9th 2013).
41 Winbind allows for the further restriction of authenticated PAM logins using
42 the require_membership_of parameter. System administrators may specify a list
43 of SIDs or groups for which an authenticated user must be a member of. If an
44 authenticated user does not belong to any of the entries, then login should
45 fail. Invalid group name entries are ignored.
47 Samba versions 3.3.10, 3.4.3, 3.5.0 and later incorrectly allow login from
48 authenticated users if the require_membership_of parameter specifies only
51 This is a vulnerability with low impact. All require_membership_of group
52 names must be invalid for this bug to be encountered.
58 o Jeremy Allison <jra@samba.org>
59 * BUG 10185: CVE-2013-4408: Correctly check DCE-RPC fragment length field.
62 o Stefan Metzmacher <metze@samba.org>
63 * BUG 10185: CVE-2013-4408: Correctly check DCE-RPC fragment length field.
66 o Noel Power <noel.power@suse.com>
67 * BUGs 10300, 10306: CVE-2012-6150: Fail authentication if user isn't
68 member of *any* require_membership_of specified groups.
71 #######################################
72 Reporting bugs & Development Discussion
73 #######################################
75 Please discuss this release on the samba-technical mailing list or by
76 joining the #samba-technical IRC channel on irc.freenode.net.
78 If you do report problems then please try to send high quality
79 feedback. If you don't provide vital information to help us track down
80 the problem then you will probably be ignored. All bug reports should
81 be filed under the Samba 4.1 product in the project's Bugzilla
82 database (https://bugzilla.samba.org/).
85 ======================================================================
86 == Our Code, Our Bugs, Our Responsibility.
88 ======================================================================
91 Release notes for older releases follow:
92 ----------------------------------------
94 =============================
95 Release Notes for Samba 4.1.2
97 =============================
100 This is is the latest stable release of Samba 4.1.
106 o Jeremy Allison <jra@samba.org>
107 * BUG 10187: Missing talloc_free can leak stackframe in error path.
108 * BUG 10196: RW Deny for a specific user is not overriding RW Allow for a
112 o Anand Avati <avati@redhat.com>
113 * BUG 10224: vfs_glusterfs: Implement proper mashalling/unmarshalling of
117 o Andrew Bartlett <abartlet@samba.org>
118 * BUG 10052: dfs_server: Use dsdb_search_one to catch 0 results as well as
119 NO_SUCH_OBJECT errors.
122 o Samuel Cabrero <scabrero@zentyal.com>
123 * BUG 9091: s4-dns: dlz_bind9: Create dns-HOSTNAME account disabled.
126 o Günther Deschner <gd@samba.org>
127 * BUG 10264: s3-winbindd: Fix cache_traverse_validate_fn failure for
131 o Christopher R. Hertel <crh@redhat.com>
132 * BUG 10224: vfs_glusterfs: Fix excessive debug output from
136 o Björn Jacke <bj@sernet.de>
137 * BUG 10247: xattr: Fix listing EAs on *BSD for non-root users.
140 o Volker Lendecke <vl@samba.org>
141 * BUG 10190: Fix memset used with constant zero length parameter.
142 * BUG 10195: nsswitch: Fix short writes in winbind_write_sock.
145 o Stefan Metzmacher <metze@samba.org>
146 * BUG 10193: s4:dsdb/rootdse: report 'dnsHostName' instead of 'dNSHostName'.
147 * BUG 10232: libcli/smb: Fix smb2cli_ioctl*() against Windows 2008.
150 o Susant Kumar Palai <spalai@redhat.com>
151 * BUG 10224: VFS plugin was sending the actual size of the volume instead of
152 the total number of block units because of which windows was getting the
153 wrong volume capacity.
156 o Andreas Schneider <asn@samba.org>
157 * BUG 10194: Make offline logon cache updating for cross child domain group
159 * BUG 10269: util: Remove 32bit macros breaking strict aliasing.
160 * BUG 10253: Fix the build of vfs_glusterfs.
163 #######################################
164 Reporting bugs & Development Discussion
165 #######################################
167 Please discuss this release on the samba-technical mailing list or by
168 joining the #samba-technical IRC channel on irc.freenode.net.
170 If you do report problems then please try to send high quality
171 feedback. If you don't provide vital information to help us track down
172 the problem then you will probably be ignored. All bug reports should
173 be filed under the Samba 4.1 product in the project's Bugzilla
174 database (https://bugzilla.samba.org/).
177 ======================================================================
178 == Our Code, Our Bugs, Our Responsibility.
180 ======================================================================
183 ----------------------------------------------------------------------
186 =============================
187 Release Notes for Samba 4.1.1
189 =============================
192 This is a security release in order to address
193 CVE-2013-4475 (ACLs are not checked on opening an alternate
194 data stream on a file or directory) and
195 CVE-2013-4476 (Private key in key.pem world readable).
198 Samba versions 3.2.0 and above (all versions of 3.2.x, 3.3.x,
199 3.4.x, 3.5.x, 3.6.x, 4.0.x and 4.1.x) do not check the underlying
200 file or directory ACL when opening an alternate data stream.
202 According to the SMB1 and SMB2+ protocols the ACL on an underlying
203 file or directory should control what access is allowed to alternate
204 data streams that are associated with the file or directory.
206 By default no version of Samba supports alternate data streams
207 on files or directories.
209 Samba can be configured to support alternate data streams by loading
210 either one of two virtual file system modues (VFS) vfs_streams_depot or
211 vfs_streams_xattr supplied with Samba, so this bug only affects Samba
212 servers configured this way.
214 To determine if your server is vulnerable, check for the strings
215 "streams_depot" or "streams_xattr" inside your smb.conf configuration
219 In setups which provide ldap(s) and/or https services, the private
220 key for SSL/TLS encryption might be world readable. This typically
221 happens in active directory domain controller setups.
227 o Jeremy Allison <jra@samba.org>
228 * BUGs 10234 + 10229: CVE-2013-4475: Fix access check verification on stream
232 o Björn Baumbach <bb@sernet.de>
233 * BUG 10234: CVE-2013-4476: Private key in key.pem world readable.
236 #######################################
237 Reporting bugs & Development Discussion
238 #######################################
240 Please discuss this release on the samba-technical mailing list or by
241 joining the #samba-technical IRC channel on irc.freenode.net.
243 If you do report problems then please try to send high quality
244 feedback. If you don't provide vital information to help us track down
245 the problem then you will probably be ignored. All bug reports should
246 be filed under the Samba 4.1 product in the project's Bugzilla
247 database (https://bugzilla.samba.org/).
250 ======================================================================
251 == Our Code, Our Bugs, Our Responsibility.
253 ======================================================================
256 ----------------------------------------------------------------------
259 =============================
260 Release Notes for Samba 4.1.0
262 =============================
265 This is is the first stable release of Samba 4.1.
267 Samba 4.1 will be the next version of the Samba suite and includes
268 all the technology found in both the Samba4 series and the stable 3.x
269 series. The primary additional features over Samba 3.6 are
270 support for the Active Directory logon protocols used by Windows 2000
273 Major enhancements in Samba 4.1.0 include:
275 Client tools support SMB2/3
276 ===========================
278 Samba 4.1.0 contains the first release of our client tools
279 and client library that work over the new protocols SMB2 or SMB3.
280 Note that SMB3 only works either to a Samba server version 4.0.0
281 or above, or to a Windows Server running Windows 2012 or Windows 8.
283 The default protocol for smbclient and smbcacls is still
284 SMB1 (the NT1 protocol dialect). An SMB2 or SMB3 connection
285 can be selected in one of two ways. The easiest way to test
286 the new protocol connection is to add the -mMAX_PROTOCOL
287 command line switch to either smbclient or smbcacls.
289 For example, to connect using SMB3 with smbclient a user
292 smbclient //server/share -Uuser%password -mSMB3
294 Another example of connecting using SMB2 using smbcacls
297 smbcacls //server/share -Uuser%password -mSMB2 filename
299 Note that when connecting using SMB2 or SMB3 protocols
300 the UNIX extensions are no longer available inside the
301 smbclient command set. This is due to UNIX extensions
302 not yet being defined for the SMB2 or SMB3 protocols.
304 The second way to select SMB2 or SMB3 connections is to
305 set the "client max protocol" parameter in the [global]
306 section of your smb.conf.
308 Setting this parameter will cause all client connections
309 from Samba and its client tools to offer the requested
310 max protocol to a server on every connection request.
312 For example, to cause all client tools (including winbindd,
313 rpcclient, and the libsmbclient library) to attempt use SMB3
314 by default add the line:
316 client max protocol = SMB3
318 to the [global] section of your smb.conf. This has not
319 been as widely tested as the -mPROTOCOL options, but
320 is intended to work correctly in the final release of
326 Although Samba servers have supported encrypted transport
327 connections using the UNIX extensions for many years,
328 selecting SMB3 transport allows encrypted transport
329 connections to Windows servers that support SMB3, as
330 well as Samba servers.
332 In order to enable this, add the "-e" option to the
333 smbclient command line.
335 For example, to connect to a Windows 2012 server over
336 SMB3 and select an encrypted transport you would use
337 the following command line:
339 smbclient //Win2012Server/share -Uuser%password -mSMB3 -e
342 Directory database replication (AD DC mode)
343 ===========================================
345 Directory replication has been reworked in order to improve the
346 correctness and efficiency.
347 As a net effect of it, replication with other domain controllers with
348 a heavily modified schema is now possible (ie. Windows 2012 DCs or
349 other Windows DC with exchange installed) and replication didn't fail
350 anymore in such environments.
353 Server-Side Copy Support
354 ========================
356 Samba 4.1.0 adds support for server-side copy operations via the SMB2
357 FSCTL_SRV_COPYCHUNK request. Clients making use of server-side copy
358 support, such as Windows Server 2012, should experience considerable
359 performance improvements for file copy operations, as file data need not
360 traverse the network.
361 This feature is enabled by default on the smbd file server.
364 Btrfs Filesystem Integration
365 ============================
367 The Btrfs VFS module provided with Samba 4.1.0 further improves the
368 performance of server-side copy operations on shares backed by a Btrfs
369 filesystem. It does so by allowing multiple files to share the same
370 on-disk extents, avoiding the unnecessary duplication of source and
371 destination file data during a server-side copy operation.
373 This feature can be explicitly enabled on smbd shares backed by a Btrfs
374 filesystem with the smb.conf parameter:
381 The Samba Web Administration Tool (SWAT) has been removed.
382 Details why SWAT has been removed can be found on the samba-technical mailing
385 https://lists.samba.org/archive/samba-technical/2013-February/090572.html
388 ######################################################################
395 Parameter Name Description Default
396 -------------- ----------- -------
398 acl allow execute always New False
399 password level Removed
400 set directory Removed
404 RUNNING Samba 4.1 as an AD DC
405 =============================
407 A short guide to setting up Samba as an AD DC can be found on the wiki:
409 https://wiki.samba.org/index.php/Samba_AD_DC_HOWTO
415 o Jeremy Allison <jra@samba.org>
416 * Add SMB2 and SMB3 support for client tools and client library.
417 * Add support for SMB3 Encrypted transport.
420 o David Disseldorp <ddiss@samba.org>
421 * Add vfs_btrfs module.
422 * Add support for server-side copy operations via the
423 SMB2 FSCTL_SRV_COPYCHUNK request.
426 CHANGES SINCE 4.1.0rc4
427 ======================
429 o Stefan Metzmacher <metze@samba.org>
430 * BUG 10178: Fix PAC parsing failure.
433 o Andreas Schneider <asn@samba.org>
434 * BUG 10132: pam_winbindd: Support the KEYRING ccache type.
437 CHANGES SINCE 4.1.0rc3
438 ======================
440 o Michael Adam <obnox@samba.org>
441 * BUG 10134: Add "acl allow execute always" parameter.
444 o Jeremy Allison <jra@samba.org>
445 * BUG 10139: Valid utf8 filenames cause "invalid conversion error"
447 * BUG 10145: Samba SMB2 client code reads the wrong short name length in a
448 directory listing reply.
449 * BUG 10149: cli_smb2_get_ea_list_path() failed to close file on exit.
450 * BUG 10150: Not all OEM servers support the ALTNAME info level.
453 o Andrew Bartlett <abartlet@samba.org>
454 * BUG 8077: dsdb: Convert the full string from UTF16 to UTF8, including
456 * BUG 9461: python-samba-tool fsmo: Do not give an error on a successful
458 * BUG 10157: Regression causes replication failure with Windows 2008R2 and
459 deletes Deleted Objects.
462 o Günther Deschner <gd@samba.org>
463 * BUG 10147: Better document potential implications of a globally used
467 o Korobkin <korobkin+samba@gmail.com>
468 * BUG 10118: Raise the level of a debug when unable to open a printer.
471 o Volker Lendecke <vl@samba.org>
472 * BUG 10008: dbwrap_ctdb: Treat empty records as non-existing.
473 * BUG 10138: smbd: Always clean up share modes after hard crash.
476 o Daniel Liberman <danielvl@gmail.com>
477 * BUG 10162: Fix POSIX ACL mapping when setting DENY ACE's from Windows.
480 o Stefan Metzmacher <metze@samba.org>
481 * BUG 10144: libcli/smb: Use SMB1 MID=0 for the initial Negprot.
482 * BUG 10146: libcli/smb: Only check the SMB2 session setup signature if
486 o Matthieu Patou <mat@matws.net>
487 * BUG 10158: Netbios related samba process consumes 100% CPU.
490 o Christof Schmitt <christof.schmitt@us.ibm.com>
491 * BUG 10137: vfs_shadow_copy2: Display previous versions correctly over
495 CHANGES SINCE 4.1.0rc2
496 ======================
498 o Michael Adam <obnox@samba.org>
499 * BUG 10107: Fix Winbind crashes on DC with trusted AD domains.
502 o Jeremy Allison <jra@samba.org>
503 * BUG 5917: Fix working on site with Read Only Domain Controller.
504 * BUG 9974: Add SMB2 and SMB3 support for smbclient.
505 * BUG 10063: Fix memory leak in source3/lib/util.c:1493.
506 * BUG 10121: Masks incorrectly applied to UNIX extension permission
510 o Christian Ambach <ambi@samba.org>
511 * BUG 9911: Build Samba 4.0.x on AIX with IBM XL C/C++.
514 o Andrew Bartlett <abartlet@samba.org>
515 * BUG 9091: When replicating DNS for bind9_dlz we need to create the
516 server-DNS account remotely.
519 o Günther Deschner <gd@samba.org>
520 * BUG 9615: Winbind unable to retrieve user information from AD.
521 * BUG 9899: winbind_lookup_names() fails because of
522 NT_STATUS_CANT_ACCESS_DOMAIN_INFO.
523 * BUG 10107: Fix Winbind crashes on DC with trusted AD domains.
526 o Volker Lendecke <vl@samba.org>
527 * BUG 10086: smbd: Fix async echo handler forking.
528 * BUG 10106: Honour output buffer length set by the client for SMB2 GetInfo
530 * BUG 10114: Handle Dropbox (write-only-directory) case correctly
534 o Stefan Metzmacher <metze@samba.org>
535 * BUG 10030: ::1 added to nameserver on join.
538 o Rusty Russell <rusty@rustcorp.com.au>
539 * BUG 10000: Add man pages for ntdb tools.
542 o Karolin Seeger <kseeger@samba.org>
543 * BUG 7364: Add man page for vfs_syncops.
544 * BUG 7490: Add man page for vfs_linux_xfs_sgid.
545 * BUG 10001: Add man page for samba-regedit tool.
546 * BUG 10076: Fix variable list in vfs_crossrename man page.
549 o Andreas Schneider <asn@samba.org>
550 * BUG 10073: Fix segmentation fault in 'net ads join'.
551 * BUG 10082: s3-winbind: Fix a segfault passing NULL to a fstring argument.
554 o Richard Sharpe <realrichardsharpe@gmail.com>
555 * BUG 10097: MacOSX 10.9 will not follow path-based DFS referrals handed
559 o Ralph Wuerthner <ralph.wuerthner@de.ibm.com>
560 * BUG 10106: Honour output buffer length set by the client for SMB2 GetInfo
564 CHANGES SINCE 4.1.0rc1
565 ======================
567 o Jeremy Allison <jra@samba.org>
568 * BUG 9992: Windows error 0x800700FE when copying files with xattr names
570 * BUG 10010: Missing integer wrap protection in EA list reading can cause
571 server to loop with DOS (CVE-2013-4124).
572 * BUG 10064: Linux kernel oplock breaks can miss signals.
575 o Andrew Bartlett <abartlet@samba.org>
576 * BUG 9029: Fix replication with --domain-crictical-only to fill in
578 * BUG 9820: Fix crash of winbind after "ls -l
579 /usr/local/samba/var/locks/sysvol".
580 * BUG 10056: dsdb improvements.
583 o Björn Baumbach <bb@sernet.de>
584 * BUG 10003: Fix segfault while reading incomplete session info.
587 o Gregor Beck <gbeck@sernet.de>
588 * BUG 9678: Windows 8 Roaming profiles fail.
591 o Günther Deschner <gd@samba.org>
592 * BUG 10043: Allow to change the default location for Kerberos credential
596 o Volker Lendecke <vl@samba.org>
597 * BUG 10013: Fix a 100% loop at shutdown time (smbd).
600 o Stefan Metzmacher <metze@samba.org>
601 * BUG 9820: Fix crash of winbind after "ls -l
602 /usr/local/samba/var/locks/sysvol".
603 * BUG 10015: Fix/improve debug options.
604 * BUG 10042: Fix crashes in socket_get_local_addr().
605 * BUG 10056: dsdb improvements.
608 o Andreas Schneider <asn@samba.org>
609 * BUG 9994: Do not delete an existing valid credential cache (s3-winbind).
610 * BUG 10040: Rename regedit to samba-regedit.
611 * BUG 10041: Remove obsolete swat manpage and references.
612 * BUG 10048: nsswitch: Add OPT_KRB5CCNAME to avoid an error message.
615 o Alexander Werth <alexander.werth@de.ibm.com>
616 * BUG 10045: Remove a redundant inlined substitution of ACLs.
619 o Ralph Wuerthner <ralphw@de.ibm.com>
620 * BUG 10064: Linux kernel oplock breaks can miss signals.
623 #######################################
624 Reporting bugs & Development Discussion
625 #######################################
627 Please discuss this release on the samba-technical mailing list or by
628 joining the #samba-technical IRC channel on irc.freenode.net.
630 If you do report problems then please try to send high quality
631 feedback. If you don't provide vital information to help us track down
632 the problem then you will probably be ignored. All bug reports should
633 be filed under the Samba 4.1 product in the project's Bugzilla
634 database (https://bugzilla.samba.org/).
637 ======================================================================
638 == Our Code, Our Bugs, Our Responsibility.
640 ======================================================================