The Samba Team is pleased to announce Samba 2.0.5.
This is the latest stable release of Samba. This is the
version that all production Samba servers should be running
for all current bug-fixes.
Please read the "IMPORTANT NOTE" section of the release
notes as this explains three security bugfixes which have
been added in this release. It is vital that Samba admins
understand these issues.
It may be fetched via ftp from :
ftp://ftp.samba.org/pub/samba/samba-2.0.5.tar.gz
Or just follow the link on the main page of
your nearest http://samba.org mirror.
Binary packages for supported systems will be made available
within a short time. A separate announcement will be made
for the release of these packages.
Offers of binary Samba packages for various systems are
welcome and should be sent to samba-bugs@samba.org.
If you have problems, or think you have found a bug please email
a report to :
samba-bugs@samba.org
As always, all bugs are our responsibility.
Without further ado, here are the release notes.
Regards,
The Samba Team.
--------------------------------------------------------
WHATS NEW IN Samba 2.0.5
=======================
This is the latest stable release of Samba. This is the
version that all production Samba servers should be running
for all current bug-fixes.
IMPORTANT NOTE !
----------------
This version of Samba contains three security bugfixes for
problems in previous versions of Samba found by Olaf Kirch of
Caldera Systems (www.caldera.com). The Samba Team would like
to publicly thank Olaf for his help in doing a security review
of our code and finding these bugs.
The three bugs are one potentially exploitable buffer overrun
bug (although no current exploits are known) in smbd and two
denial of service bugs in nmbd. By default the smbd bug was not
exploitable as shipped (the problem parameter was disabled by
default) but instructions on protecting any version of Samba
prior to 2.0.5 are included below.
All these bugs have been fixed in Samba 2.0.5.
If using any version of Samba prior to 2.0.5 the administrator
*MUST NOT* enable the "message command" parameter in smb.conf,
and *MUST* remove any "message command" that is listed in any
existing smb.conf file. No known instances of this attack being
exploited have been reported.
All Samba versions of nmbd prior to 2.0.5 are vulnerable to a
denial of service attack causing nmbd to either crash or to go
into an infinite loop. No known instances of this attack being
exploited have been reported.
New/Changed parameters in 2.0.5
-------------------------------
There are 5 new parameters in the smb.conf file.
security mask
force security mode
directory security mask
force directory mode
level2 oplocks
The first 4 parameters are used to control the UNIX permissions bits
that an NT client is allowed to modify. These parameters are now
used instead of the older "create" parameters that were used in
2.0.4 to allow an administrator to separate the two functions.
Use of these new parameters is described in the smb.conf man page,
and also in the documents :
docs/textdocs/NT_Security.txt
docs/htmldocs/NT_Security.html
The fifth new parameter is described in the following section.
Level II oplocks
----------------
Samba 2.0.5 now implements level2 oplocks. As this is new
code this parameter is set to "off" by default. The benefit
of level2 oplocks is to allow read-only file caching from
multiple clients. This is of great speed benefit to shares
that are serving application executable programs (.EXE's)
that are usually not written to. To learn more about using
level 2 oplocks read the parameter description in the smb.conf
documentation or read the file :
docs/textdocs/Speed.txt.
Changes in 2.0.5
-----------------
1). smbmount for Linux systems has been re-written to use
the libsmb code and clientutil.c is no longer used with it.
2). A bug preventing directory opens using the NT SMB calls
has been fixed.
3). A related bug causing a file structure leak when directory
opens were denied has been fixed.
4). Fix for glibc2.1 bug on 32-bit systems being reported as 64
bit.
5). Prevent timestamps of 0 or -1 corrupting file timestamps.
6). Fix for unusual delays when browsing shares using Windows
2000 - fix added by Matt.
7). Fix for smbpassword reading problems on Sparc Linux was fixed.
8). Fix for compiling with SSL library.
9). smbclient fix for crash when doing CR/LF conversion.
10). smbclient now reports short read errors.
11). smbclient now uses remote server workgroup to list servers by default.
12). smbclient now has -b option to change transmit/send buffer size.
13). smbclient fix for corrupting files when issuing multiple outstanding
read requests.
14). Printing bug where Linux was using SYSV printing by default fixed.
Linux now set to be BSD printing by default.
15). Change for Linux to use SYSV shared memory by default.
16). Fix for using IP_TOS options on some systems.
17). Fix for some systems that complained about static struct passwd
buffers being modified.
18). Range checking applied to all string substitutions. Theoretically
not a bug, but much more rebust now.
19). Level II oplocks implemented.
20). Fix for Win2K client printing added.
21). Always allow loopback (127.0.0.1) connects unless specifically denied.
22). Patch for FreeBSD interface detection code from Archie Cobbs
(archie@whistle.com).
23). Return correct status from smbrun.
24). snprintf fixes for floating point numbers.
25). Force directories to always have zero size.
26). Fix for "force group" and "force user" options.
"force user" now
always uses primary group of user as well. Force group now enhanced with
'+'
semantics (see smb.conf man page for details).
27). Wildcard matching fix to get closer to WinNT semantics for Win9x clients.
28). Potential crash bug fixed in wildcard matching code. This bug could also
cause smbd to sometimes not see exact file matches.
29). Read/write for sockets changed to use revc/send to allow optimisations
later.
30). Oplocks added to client library.
31). Several purify fixes in IPC code.
32). nmbd crash bug in processing strange NetBIOS names fixed.
33). nmbd loop bug in processing strange NetBIOS names fixed.
34). Paranoia fixes to processing of incoming WinPopup messages in smbd.
35). Share mode code now auto initialised.
36). Detect dead processes in IPC lock code.
37). Explicit -V version switch added to command line processing.
38). WORKGROUP(1b) name processing with no WINS server fixed.
39). Win2k client detection code added by Matt.
40). Fix to allow really short changenotify times to be honoured.
41). Fix for NT delete finding the wrong file from Tine Smukavec
(valentin.smukavec@hermes.si)
42). SWAT fix to prevent stderr messages from breaking the Web client.
43). testparm fixes to check more parameter conflicts.
44). Relative paths not fetched via SWAT in CGI scripts.
45). SWAT remote password change - remote host name not treated as a
password field any more.
Changes in 2.0.4b
-----------------
A bug with MS-Word 97 saving files with zero UNIX permissions
was fixed. Even though a workaround is available (set force
create mode = 644 on the share) Word is such an important
application that a point fix was neccessary.
Changes in 2.0.4a
-----------------
The text and html versions of NT_Security were missing from
the shipping tarball. Also a compile bug for platforms that
don't have usleep was fixed.
Changes in 2.0.4
----------------
There are 5 new parameters and one modified parameter in
the smb.conf file.
allow trusted domains
restrict anonymous
mangle locks
oplock break wait time
oplock contention limit
The modified parameter is :
nt acl support
Bugfixes added since 2.0.3
--------------------------
1). Fix for 8 character password problem when using HPUX and
plaintext passwords.
2). --with-pam option added to ./configure.
3). Client fixes for memory leak and display of 64 bit values.
4). Fixes for -E and -s option with smbclient.
5). smbclient now allows -L //server or -L \\server
6). smbtar fix for display of 64 bit values.
7). Endian independence added to DCE/RPC code.
8). DCE/RPC marshalling/unmarshalling code re-written to provide
overflow reporting and sign and seal support.
9). Bind NAK reply packet added to DCE/RPC code, used to correctly
refuse bind requests (prevents NT system event log messages).
10). Mapping of UNIX permissions into NT ACL's for get and set
added.
11). DCE/RPC enumeration of numbers of shares made dynamic.
Samba now has no limit on the number of exported shares seen.
12). Fix to speed up random number seed generation on /dev/urandom
being unavailable.
13). Several memory fixes added by running Purify on the code.
14). Read from client error messages improved.
15). Fixed endianness used in UNICODE strings.
16). Cope with ERRORmoredata in an RPC pipe client call.
17). Check for malformed responses in nmbd register name.
18). NT Encrypted password changing from the NT password dialog box
now fully implmented.
19). Mangle 64-bit lock ranges into 32-bits (NT bug!) on a 32-bit
Samba platform.
20). Allow file to be pseudo-openend in order to read security only.
21). Improve filename mangling to reduce chance of collisions.
22). Added code to prevent granting of oplocks when a file is under
contention.
23). Added tunable wait time before sending an oplock break request
to a client if the client caused the break request. Helps with clients
not responding to oplock breaks.
24). Always respond negatively to queued local oplock break messages
before shutdown. This can prevent "freezes" on an oplock error.
25). Allow admin to restrict logons to correct domain when in domain
level security.
26). Added "restrict anonymous" patch from Andy
(thwartedefforts@wonky.org)
to prevent parameter substitution problems with anonymous connections.
27). Fix SMBseek where seeking to a negative number sets the offset
to zero.
28). Fixed problem with mode getting corrupted in trans2 request
(setting to zero means please ignore it).
29). Correctly become the authenticated user on an authenticated
DCE/RPC pipe request.
30). Correctly reset debug level in nmbd if someone set it on the
command line.
31). Added more checking into testparm
32). NetBench simulator added to smbtorture by Andrew.
33). Fixed NIS+ option compile (was broken in 2.0.3).
34). Recursive smbclient directory listing fix. Patch from E. Jay Berkenbilt
(ejb@ql.org)
Bugfixes added since 2.0.2
--------------------------
1). --with-ssl configure now include ssl include directory. Fix
from Richard Sharpe.
2). Patch for configure for glibc2.1 support (large files etc.).
3). Several bugfixes for smbclient tar mode from Bob Boehmer
(boehmer@worldnet.att.net) to fix smbclient aborting problems
when restoring tar files.
4). Some automount fixes for smbmount.
5). Attempt to fix the AIX 4.1.x/3.x problems where smbd runs as
root. As no-one has given us root access to such a server this
cannot be tested fully, but should work.
6). Crash bug fix in debug code where *real* uid rather than
*effective* uid was being checked before attempting to rotate
log files. This fix should help a *lot* of people who were
reporting smbd aborting in the middle of a copy operation.
7). SIGALRM bugfix to ensure infinate file locks time out.
8). New code to implement NT ACL reporting for cacls.exe program.
9). UDP loopback socket rebind fix for Solaris.
10). Ensure all UNICODE strings are correctly in little-endian
format.
11). smbpasswd file locking fix.
12). Fixes for strncpy problems with glibc2.1.
13). Ensure smbd correctly reports major and minor version number
and server type when queried via NT rpc calls.
14). Bugfix for short mangled names not being pulled off the
mangled stack correctly.
15). Fix for mapping of rwx bits being incorrectly overwritten
when doing ATTRIB.EXE
16). Fix for returning multiple PDU packets in NT rpc code. Should
allow multiple shares to be returned correctly).
17). Improved mapping of NT open access requests into UNIX open
modes.
18). Fix for copying files from an NTFS volume that contain
multiple data forks. Added 'magic' error code NT needs.
19). Fixed crash bug when primary NT authentication server
is down, rolls over to secondaries correctly now.
20). Fixed timeout processing to be timer based. Now will
always occur even if smbd is under load.
21). Fixed signed/unsigned problem in quotas code.
22). Fixed bug where setting the password of a completely fresh
user would end up setting the account disabled flag.
23). Improved user logon messages to help admins having
trouble with user authentication.
Bugfixes added since 2.0.1
--------------------------
Note that due to a critical signal handling bug in 2.0.1,
this release has been removed and replaced immediately with
2.0.2. The Samba Team would like to apologise for any problem
this may have caused.
1). Fixed smbd looping on SIGCLD problem. This was
caused by a missing break statement in a critical
piece of code.
Bugfixes added since 2.0.0
--------------------------
1). Autoconf changes for gcc2.7.x and Solaris 2.5/2.6
2). Autoconf changes to help HPUX configure correctly.
3). Autoconf changes to allow lock directory to be set.
4). Client fix to allow port to be set.
5). clitar fix to send debug messages to stderr.
6). smbmount race condition fix.
7). Fix for bug where trying to browse large numbers of shares
generated an error from an NT client.
8). Wrapper for setgroups for SunOS 4.x
9). Fix for directory deleting failing from multiuser NT.
10). Fix for crash bug if bitmap was full.
11). Fix for Linux genrand where /dev/random could cause
clients to timeout on connect if the entropy pool was
empty.
12). The default PASSWD_CHAT may now be overridden in local.h
13). HPUX printing fixes for default programs.
14). Reverted (erroneous) code in MACHINE.SID generation that
was setting the sid to 0x21 - should be *decimal* 21.
15). Fix for printing to remote machine under SVR4.
16). Fix for chgpasswd wait being interrupted with EINTR.
17). Fix for disk free routine. NT and Win98 now correctly
show greater than 2GB disks.
18). Fix for crash bug in stat cache statistics printing.
19). Fix for filenames ending in .~xx.
20). Fix for access check code wait being interrupted with EINTR.
21). Fix for password changes from "invalid password" to a valid
one setting the account disabled bit.
22). Fix for smbd crash bug in SMBreadraw cache prime code.
23). Fix for overly zealous lock range overflow reporting.
24). Fix for large disk disk free reporting (NT SMB code).
25). Fix for NT failing to truncate files correctly.
26). Fix for smbd crash bug with SMBcancel calls.
27). Additional -T flag to nmblookup to do reverse DNS on addresses.
28). SWAT fix to start/stop smbd/nmbd correctly.
Major changes in Samba 2.0
--------------------------
This is a MAJOR new release of Samba, the UNIX based SMB/CIFS file
and print server for Windows systems.
There have been many changes in Samba since the last major release,
1.9.18. These have mainly been in the areas of performance and
SMB protocol correctness. In addition, a Web based GUI interface
for configuring Samba has been added.
In addition, Samba has been re-written to help portability to
other POSIX-based systems, based on the GNU autoconf tool.
There are many major changes in Samba for version 2.0. Here are
some of them:
====================================================================
1). Speed
---------
Samba has been benchmarked on high-end UNIX hardware as out-performing
all other SMB/CIFS servers using the Ziff-Davis NetBench benchmark.
Many changes to the code to optimise high-end performance have been made.
2). Correctness
---------------
Samba now supports the Windows NT specific SMB requests. This
means that on platforms that are capable Samba now presents a
64 bit view of the filesystem to Windows NT clients and is
capable of handling very large files.
3). Portability
---------------
Samba is now self-configuring using GNU autoconf, removing
the need for people installing Samba to have to hand configure
Makefiles, as was needed in previous versions.
You now configure Samba by running "./configure" then
"make". See
docs/textdocs/UNIX_INSTALL.txt for details.
4). Web based GUI configuration
-------------------------------
Samba now comes with SWAT, a web based GUI config system. See
the swat man page for details on how to set it up.
5). Cross protocol data integrity
---------------------------------
An open function interface has been defined to allow
"opportunistic locks" (oplocks for short) granted by Samba
to be seen by other UNIX processes. This allows complete
cross protocol (NFS and SMB) data integrety using Samba
with platforms that support this feature.
6). Domain client capability
----------------------------
Samba is now capable of using a Windows NT PDC for user
authentication in exactly the same way that a Windows NT
workstation does, i.e. it can be a member of a Domain. See
docs/textdocs/DOMAIN_MEMBER.txt for details.
7). Documentation Updates
-------------------------
All the reference parts of the Samba documentation (the
manual pages) have been updated and converted to a document
format that allows automatic generation of HTML, SGML, and
text formats. These documents now ship as standard in HTML
and manpage format.
====================================================================
NOTE - Some important option defaults changed
---------------------------------------------
Several parameters have changed their default values. The most
important of these is that the default security mode is now user
level security rather than share level security.
This (incompatible) change was made to ease new Samba installs
as user level security is easier to use for Windows 95/98 and
Windows NT clients.
********IMPORTANT NOTE****************
If you have no "security=" line in the [global] section of
your current smb.conf and you update to Samba 2.0 you will
need to add the line :
security=share
to get exactly the same behaviour with Samba 2.0 as you
did with previous versions of Samba.
********END IMPORTANT NOTE*************
In addition, Samba now defaults to case sensitivity options that
match a Windows NT server precisely, that is, case insensitive
but case preserving.
The default format of the smbpasswd file has also been
changed for this release, although the new tools will read
and write the old format, for backwards compatibility.
====================================================================
NOTE - Primary Domain Controller Functionality
----------------------------------------------
This version of Samba contains code that correctly implements
the undocumented Primary Domain Controller authentication
protocols. However, there is much more to being a Primary
Domain Controller than serving Windows NT logon requests.
A useful version of a Primary Domain Controller contains
many remote procedure calls to do things like enumerate users,
groups, and security information, only some of which Samba currently
implements. In addition, there are outstanding (known) bugs with
using Samba as a PDC in this release that the Samba Team are actively
working on. For this reason we have chosen not to advertise and
actively support Primary Domain Controller functionality with this
release.
This work is being done in the CVS (developer) versions of Samba,
development of which continues at a fast pace. If you are
interested in participating in or helping with this development
please join the Samba-NTDOM mailing list. Details on joining
are available at :
http://samba.org/listproc/
Details on obtaining CVS (developer) versions of Samba
are available at:
http://samba.org/cvs.html
====================================================================
If you have problems, or think you have found a bug please email
a report to :
samba-bugs@samba.org
As always, all bugs are our responsibility.
Regards,
The Samba Team.