./net/samba4, SMB/CIFS protocol server suite

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Branch: CURRENT, Version: 4.17.3, Package name: samba-4.17.3, Maintainer: pkgsrc-users

Samba is the standard Windows interoperability suite of programs
for Linux and Unix.

Samba is Free Software licensed under the GNU General Public License,
the Samba project is a member of the Software Freedom Conservancy.

Since 1992, Samba has provided secure, stable and fast file and
print services for all clients using the SMB/CIFS protocol, such
as all versions of DOS and Windows, OS/2, Linux and many others.

Samba is an important component to seamlessly integrate Linux/Unix
Servers and Desktops into Active Directory environments. It can
function both as a domain controller or as a regular domain member.

This package intends to provide the current stable version of samba
within the 4.x series. (As will all packages, it may of course
sometimes contain an older stable release due to not being updated
yet.)

MESSAGE.rcd [+/-]

Required to run:
[textproc/py-expat] [converters/libiconv] [databases/openldap-client] [archivers/libarchive] [lang/perl5] [net/py-dns] [security/gnutls] [security/libgcrypt] [devel/p5-Parse-Yapp] [devel/popt] [devel/gettext-lib] [devel/readline] [net/avahi] [textproc/jansson] [devel/talloc] [time/py-iso8601] [devel/cmocka] [databases/lmdb] [lang/python37] [devel/tevent] [databases/ldb]

Required to build:
[textproc/docbook-xml] [textproc/docbook-xsl] [textproc/libxslt] [pkgtools/x11-links] [x11/xcb-proto] [x11/fixesproto4] [pkgtools/cwrappers] [x11/xorgproto]

Package options: ads, avahi, ldap, pam, winbind

Master sites:

Filesize: 30083.086 KB

Version history: (Expand)


CVS history: (Expand)


   2022-11-29 14:20:23 by Jonathan Perkin | Files touched by this commit (3)
Log message:
samba4: Build krb5.so module statically.

Avoids issues when building on systems that have a native libkrb5.so.  Samba
libraries that try to link against krb5.so, which during the build phase is
named libgensec_module_krb5.so, end up with incorrect library dependencies,
likely due to wrapper interactions.
   2022-11-25 11:21:14 by Thomas Klausner | Files touched by this commit (2) | Package updated
Log message:
samba: update to 4.17.3.

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

o CVE-2022-42898: Samba's Kerberos libraries and AD DC failed to guard against
                  integer overflows when parsing a PAC on a 32-bit system, which
                  allowed an attacker with a forged PAC to corrupt the heap.
                  https://www.samba.org/samba/security/CVE-2022-42898.html

Changes since 4.17.2
--------------------
o  Joseph Sutton <josephsutton@catalyst.net.nz>
   * BUG 15203: CVE-2022-42898

o  Nicolas Williams <nico@twosigma.com>
   * BUG 15203: CVE-2022-42898
   2022-10-26 12:32:08 by Thomas Klausner | Files touched by this commit (687)
Log message:
*: bump PKGREVISION for libunistring shlib major bump
   2022-10-25 18:15:35 by Takahiro Kambe | Files touched by this commit (2) | Package updated
Log message:
net/samba4: update to 4.17.2

4.17.2 (2022/10-25)

o CVE-2022-3437:  There is a limited write heap buffer overflow in the GSSAPI
                  unwrap_des() and unwrap_des3() routines of Heimdal (included
                  in Samba).
                  https://www.samba.org/samba/security/CVE-2022-3437.html

o CVE-2022-3592:  A malicious client can use a symlink to escape the exported
                  directory.
                  https://www.samba.org/samba/security/CVE-2022-3592.html

Changes since 4.17.1
--------------------

o  Volker Lendecke <vl@samba.org>
   * BUG 15207: CVE-2022-3592.

o  Joseph Sutton <josephsutton@catalyst.net.nz>
   * BUG 15134: CVE-2022-3437.
   2022-10-25 09:46:11 by Thomas Klausner | Files touched by this commit (11) | Package updated
Log message:
samba: update to 4.17.1.

Changes since 4.17.0
--------------------

o  Jeremy Allison <jra@samba.org>
   * BUG 14611: CVE-2021-20251 [SECURITY] Bad password count not incremented
     atomically.
   * BUG 15174: smbXsrv_connection_shutdown_send result leaked.
   * BUG 15182: Flush on a named stream never completes.
   * BUG 15195: Permission denied calling SMBC_getatr when file not exists.

o  Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
   * BUG 15189: Samba 4.5 sometimes cannot be upgraded to Samba 4.6 or later
     over DRS: WERROR_DS_DRA_MISSING_PARENT due to faulty GET_ANC.
   * BUG 15191: pytest: add file removal helpers for TestCaseInTempDir.

o  Andrew Bartlett <abartlet@samba.org>
   * BUG 14611: CVE-2021-20251 [SECURITY] Bad password count not incremented
     atomically.
   * BUG 15189: Samba 4.5 sometimes cannot be upgraded to Samba 4.6 or later.
     over DRS: WERROR_DS_DRA_MISSING_PARENT due to faulty GET_ANC.

o  Ralph Boehme <slow@samba.org>
   * BUG 15182: Flush on a named stream never completes.

o  Volker Lendecke <vl@samba.org>
   * BUG 15151: vfs_gpfs silently garbles timestamps > year 2106.

o  Gary Lockyer <gary@catalyst.net.nz>
   * BUG 14611: CVE-2021-20251 [SECURITY] Bad password count not incremented
     atomically.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 15200: multi-channel socket passing may hit a race if one of the
     involved processes already existed.
   * BUG 15201: memory leak on temporary of struct imessaging_post_state and
     struct tevent_immediate on struct imessaging_context (in
     rpcd_spoolss and maybe others).

o  Noel Power <noel.power@suse.com>
   * BUG 15205: Since popt1.19 various use after free errors using result of
     poptGetArg are now exposed.

o  Anoop C S <anoopcs@samba.org>
   * BUG 15192: Remove special case for O_CREAT in SMB_VFS_OPENAT from
     vfs_glusterfs.

o  Andreas Schneider <asn@samba.org>
   * BUG 15169: GETPWSID in memory cache grows indefinetly with each NTLM auth.

o  Joseph Sutton <josephsutton@catalyst.net.nz>
   * BUG 14611: CVE-2021-20251 [SECURITY] Bad password count not incremented
     atomically.

                   ==============================
                   Release Notes for Samba 4.17.0
                         September 13, 2022
                   ==============================

This is the first stable release of the Samba 4.17 release series.
Please read the release notes carefully before upgrading.

NEW FEATURES/CHANGES
====================

SMB Server performance improvements
-----------------------------------

The security improvements in recent releases
(4.13, 4.14, 4.15, 4.16), mainly as protection against symlink races,
caused performance regressions for meta data heavy workloads.

With 4.17 the situation improved a lot again:

- Pathnames given by a client are devided into dirname and basename.
  The amount of syscalls to validate dirnames is reduced to 2 syscalls
  (openat, close) per component. On modern Linux kernels (>= 5.6) smbd
  makes use of the openat2() syscall with RESOLVE_NO_SYMLINKS,
  in order to just use 2 syscalls (openat2, close) for the whole dirname.

- Contended path based operations used to generate a lot of unsolicited
  wakeup events causing thundering herd problems, which lead to masive
  latencies for some clients. These events are now avoided in order
  to provide stable latencies and much higher throughput of open/close
  operations.

Configure without the SMB1 Server
---------------------------------

It is now possible to configure Samba without support for
the SMB1 protocol in smbd. This can be selected at configure
time with either of the options:

--with-smb1-server
--without-smb1-server

By default (without either of these options set) Samba
is configured to include SMB1 support (i.e. --with-smb1-server
is the default). When Samba is configured without SMB1 support,
none of the SMB1 code is included inside smbd except the minimal
stub code needed to allow a client to connect as SMB1 and immediately
negotiate the selected protocol into SMB2 (as a Windows server also
allows).

None of the SMB1-only smb.conf parameters are removed when
configured without SMB1, but these parameters are ignored by
the smbd server. This allows deployment without having to change
an existing smb.conf file.

This option allows sites, OEMs and integrators to configure Samba
to remove the old and insecure SMB1 protocol from their products.

Note that the Samba client libraries still support SMB1 connections
even when Samba is configured as --without-smb1-server. This is
to ensure maximum compatibility with environments containing old
SMB1 servers.

Bronze bit and S4U support now also with MIT Kerberos 1.20
----------------------------------------------------------

In 2020 Microsoft Security Response Team received another Kerberos-related
report. Eventually, that led to a security update of the CVE-2020-17049,
Kerberos KDC Security Feature Bypass Vulnerability, also known as a ‘Bronze
Bit’. With this vulnerability, a compromised service that is configured to use
Kerberos constrained delegation feature could tamper with a service ticket that
is not valid for delegation to force the KDC to accept it.

With the release of MIT Kerberos 1.20, Samba AD DC is able able to mitigate the
‘Bronze Bit’ attack. MIT Kerberos KDC's KDB (Kerberos Database Driver) API was
changed to allow passing more details between KDC and KDB components. When built
against MIT Kerberos, Samba AD DC supports MIT Kerberos 1.19 and 1.20 versions
but 'Bronze Bit' mitigation is provided only with MIT Kerberos 1.20.

In addition to fixing the ‘Bronze Bit’ issue, Samba AD DC now fully supports
S4U2Self and S4U2Proxy Kerberos extensions.

Note the default (Heimdal-based) KDC was already fixed in 2021,
see https://bugzilla.samba.org/show_bug.cgi?id=14642

Resource Based Constrained Delegation (RBCD) support
----------------------------------------------------

Samba AD DC built with MIT Kerberos 1.20 offers RBCD support now. With MIT
Kerberos 1.20 we have complete RBCD support passing Sambas S4U testsuite.

samba-tool delegation got the 'add-principal' and 'del-principal' subcommands
in order to manage RBCD.

To complete RBCD support and make it useful to Administrators we added the
Asserted Identity [1] SID into the PAC for constrained delegation. This is
available for Samba AD compiled with MIT Kerberos 1.20.

Note the default (Heimdal-based) KDC does not support RBCD yet.

[1] \ 
https://docs.microsoft.com/en-us/windows-server/security/kerberos/kerberos-constrained-delegation-overview

Customizable DNS listening port
-------------------------------

It is now possible to set a custom listening port for the builtin DNS service,
making easy to host another DNS on the same system that would bind to the
default port and forward the domain-specific queries to Samba using the custom
port. This is the opposite configuration of setting a forwarder in Samba.

It makes possible to use another DNS server as a front and forward to Samba.

Dynamic DNS updates may not be proxied by the front DNS server when forwarding
to Samba. Dynamic DNS update proxying depends on the features of the other DNS
server used as a front.

CTDB changes
------------

* When Samba is configured with both --with-cluster-support and
  --systemd-install-services then a systemd service file for CTDB will
  be installed.

* ctdbd_wrapper has been removed.  ctdbd is now started directly from
  a systemd service file or init script.

* The syntax for the ctdb.tunables configuration file has been
  relaxed.  However, trailing garbage after the value, including
  comments, is no longer permitted.  Please see ctdb-tunables(7) for
  more details.

Operation without the (unsalted) NT password hash
-------------------------------------------------

When Samba is configured with 'nt hash store = never' then Samba will
no longer store the (unsalted) NT password hash for users in Active
Directory.  (Trust accounts, like computers, domain controllers and
inter-domain trusts are not impacted).

In the next version of Samba the default for 'nt hash store' will
change from 'always' to 'auto', where it will follow (behave as 'nt
hash store = never' when 'ntlm auth = disabled' is set.

Security-focused deployments of Samba that have eliminated NTLM from
their networks will find setting 'ntlm auth = disabled' with 'nt hash
store = always' as a useful way to improve compliance with
best-practice guidance on password storage (which is to always use an
interated hash).

Note that when 'nt hash store = never' is set, then arcfour-hmac-md5
Kerberos keys will not be available for users who subsequently change
their password, as these keys derive their values from NT hashes.  AES
keys are stored by default for all deployments of Samba with Domain
Functional Level 2008 or later, are supported by all modern clients,
and are much more secure.

Finally, also note that password history in Active Directory is stored
in nTPwdHistory using a series of NT hash values.  Therefore the full
password history feature is not available in this mode.

To provide some protection against password re-use previous Kerberos
hash values (the current, old and older values are already stored) are
used, providing a history length of 3.

There is one small limitation of this workaround: Changing the
sAMAccountName, userAccountControl or userPrincipalName of an account
can cause the Kerberos password salt to change.  This means that after
*both* an account rename and a password change, only the current
password will be recognised for password history purposes.

Python API for smbconf
----------------------

Samba's smbconf library provides a generic frontend to various
configuration backends (plain text file, registry) as a C library. A
new Python wrapper, importable as 'samba.smbconf' is available.  An
additional module, 'samba.samba3.smbconf', is also available to enable
registry backend support. These libraries allow Python programs to
read, and optionally write, Samba configuration natively.

JSON support for smbstatus
--------------------------

It is now possible to print detailed information in JSON format in
the smbstatus program using the new option --json. The JSON output
covers all the existing text output including sessions, connections,
open files, byte-range locks, notifies and profile data with all
low-level information maintained by Samba in the respective databases.

Protected Users security group
------------------------------

Samba AD DC now includes support for the Protected Users security
group introduced in Windows Server 2012 R2. The feature reduces the
attack surface of user accounts by preventing the use of weak
encryption types. It also mitigates the effects of credential theft by
limiting credential lifetime and scope.

The protections are intended for user accounts only, and service or
computer accounts should not be added to the Protected Users
group. User accounts added to the group are granted the following
security protections:

   * NTLM authentication is disabled.
   * Kerberos ticket-granting tickets (TGTs) encrypted with RC4 are
     not issued to or accepted from affected principals. Tickets
     encrypted with AES, and service tickets encrypted with RC4, are
     not affected by this restriction.
   * The lifetime of Kerberos TGTs is restricted to a maximum of four
     hours.
   * Kerberos constrained and unconstrained delegation is disabled.

If the Protected Users group is not already present in the domain, it
can be created with 'samba-tool group add'. The new '--special'
parameter must be specified, with 'Protected Users' as the name of the
group. An example command invocation is:

samba-tool group add 'Protected Users' --special

or against a remote server:

samba-tool group add 'Protected Users' --special -H ldap://dc1.example.com -U \ 
Administrator

The Protected Users group is identified in the domain by its having a
RID of 525. Thus, it should only be created with samba-tool and the
'--special' parameter, as above, so that it has the required RID
to function correctly.

REMOVED FEATURES
================

LanMan Authentication and password storage removed from the AD DC
-----------------------------------------------------------------

The storage and authentication with LanMan passwords has been entirely
removed from the Samba AD DC, even when "lanman auth = yes" is set.

smb.conf changes
================

  Parameter Name                          Description     Default
  --------------                          -----------     -------
  dns port                                New default     53
  fruit:zero_file_id                      New default     yes
  nt hash store                           New parameter   always
  smb1 unix extensions                    Replaces "unix extensions"
  volume serial number                    New parameter   -1
  winbind debug traceid                   New parameter   no
   2022-09-12 18:04:57 by Adam Ciarcinski | Files touched by this commit (2) | Package updated
Log message:
samba4: updated to 4.16.5

Changes since 4.16.4
--------------------
* BUG 15128: Possible use after free of connection_struct when iterating
  smbd_server_connection->connections.
* BUG 15086: Spotlight RPC service returns wrong response when Spotlight is
  disabled on a share.
* BUG 15126: acl_xattr VFS module may unintentionally use filesystem
  permissions instead of ACL from xattr.
* BUG 15153: Missing SMB2-GETINFO access checks from MS-SMB2 3.3.5.20.1.
* BUG 15161: assert failed: !is_named_stream(smb_fname)") at
  ../../lib/util/fault.c:197.
* BUG 15148: Missing READ_LEASE break could cause data corruption.
* BUG 15124: rpcclient can crash using setuserinfo(2).
* BUG 15132: Samba fails to build with glibc 2.36 caused by including
  <sys/mount.h> in libreplace.
* BUG 15152: SMB1 negotiation can fail to handle connection errors.
* BUG 15078: samba-tool domain join segfault when joining a samba ad domain.
   2022-09-03 20:49:22 by Jonathan Perkin | Files touched by this commit (2)
Log message:
samba4: Remove gensec/krb5 patch.

It doesn't appear to solve the problem, I must have had a stale install
directory around when testing.  Still none the wiser as to why the krb5 module
isn't being built correctly, but apparently it seems to work for some folks, so
it will have to be left broken on SunOS for a bit.
   2022-08-30 19:47:50 by Jonathan Perkin | Files touched by this commit (5)
Log message:
samba4: Various build fixes.