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Samba 2.0.6 released

Nov 11, 1999, 07:39 (0 Talkback[s])
(Other stories by Jeremy Allison)

[ Jeremy Allison writes: ]

The Samba Team is pleased to announce Samba 2.0.6.

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.

It may be fetched via ftp from :


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 :


As always, all bugs are our responsibility.

Without further ado, here are the release notes.


The Samba Team.

WHATS NEW IN Samba 2.0.6

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.

New/Changed parameters in 2.0.6

There are 6 new parameters in the smb.conf file.

wins hook

This parameter allows an external program to be called on all changes to a Samba WINS database, allowing dynamic DNS updates.

debug hires timestamp
debug pid
debug uid

The above 3 parameters provide greater debug information.

preexec close
rootpreexec close

The above 2 parameters control the action taken on the success or failure of a 'preexec' script.

There is also one removed parameter.

mangle locks

The addition of these new parameters and the removal of the old is described in more detail in the smb.conf man page,

When using "security=domain" the "password server" parameter can now be set to the string "*', which will cause Samba to search for Domain controllers in the same way that Windows NT does. See the smb.conf man page for more details.

The "interfaces" parameter in smb.conf can now be dynamically detected on startup and can also now take an interface name such as eth0. See the smb.conf man page for the details on the new features of the "interfaces" parameter. nmbd has been enhanced to use this feature.

The syntax for the Linux-specific smbmount command has been changed and is now compatible with the standard mount command. See the modified smbmount man page for details.

Support for the UNIX CUPS printer standard has been added. See http://www.cups.org for details. Thanks to the folks at Easy Software Products for this code. Set the printcap name to "cups" to enable this. See the smb.conf man page for details.

Changes in 2.0.6

1). 64-bit locking removed from Linux autoconf build. This fixes several Linux specific locking issues.
2). Crash bug fix in smbclient recursive processing. Fix from E. Jay Berkenbilt (ejb@ql.org).
3). "history" command added to smbclient if readline available.
4). smbtar - updates files and directory message on restore.
4). smbtar - updates files and directory message on restore.
5). smbmnt - 'u', 'g', 'r', 'f', 'd' options added by Andrew. See
5). smbmnt - 'u', 'g', 'r', 'f', 'd' options added by Andrew. See man page for details.
6). smbmount updated to be useable by autofs on Linux. See the samba/examples/autofs/README file for details.
7). Bug fixed where TCP_NODELAY was not being used by default in smbd.
8). Many oplock fixes. Samba now waits 30 seconds, not 45. Also smbd no longer aborts on client break failure, but logs a message and continues. This is what NT does. This should fix many "oplock break" message problems people have been having.
9). New code from Andrew to dynamically detect interfaces. nmbd will now attempt to dynamically detect interface changes and register names as an interface goes "up".
10). Win95 ioctl for print jobs added by Matt.
11). Mapping for ISO8859-1 extended for codepage 437 and 850.
12). Code Page 737 -> ISO-8859-7 (Greek-Hellenic) mapping added.
13). Character strings now correctly converted from UNIX character set format to DOS codepage when read from smb.conf or external passwd or group files. Samba is now much more careful about what format external strings should be converted to/from.
14). snprintf crash fix for IRIX 6.2 and below.
15). Increased timestamp debug fixes (adds milliseconds and uid/pid if
16). Optimisation for wildcard exact match requests.
17). Win95 wildcard semantics fix - unused code removed.
17). Win95 wildcard semantics fix - unused code removed.
18). 'mangle locks' parameter removed. This now done automatically.
19). setXid() routines re-written to provide asserts and also to fix AIX versions prior to 4.1.x.
20). MSG_WAITALL optimisation removed due to bugs in FreeBSD.
21). Length fix when writing UNICODE string.
22). oplock processing added to libsmb client code.
23). Added more client error message strings.
24). Fix bug with connecting to encrypted server when non-encrypted password given.
25). In security=domain, password server extended to search for DC's if parameter = '*'.
26). "root did not create samaphore" bug fixed.
27). random generator initialized early to prevent icons not showing up in Win9x.
28). Logging fix after SIGHUP.
29). WINS hook external call added when nmbd is a WINS server.
30). Support for CUPS printer protocol added by Michael Sweet.
31). Support for NIS+ backend password database updates.
32). Handle dashes in print job id's. Fix from Dom.Mitchell@palmerharvey.co.uk
33). Race condition in UNIX password sync on some platforms fixed by Matt.
34). Dirptr leak from Win98 fixed.
35). Logic bug in handling of level II oplocks fixed.
36). smbd crash bug fix when opening directories.
37). Paranoia oplock fix from Charles Hoch (hoch@exemplary.com)
38). Fix Win2k problem where DCE/RPC is done on SMBwrite as well as SMBwriteX.
39). Fix Win95 redirector alignment bug that caused oplock break failures.
40). Preexec close code added.
41). Extra sanity checks in testparm code.
42). oplock tests added to smbtorture.
43). Tell SWAT user if logged in as root or not.
44). Solaris packaging fixes donated by VERITAS.

Older release notes for Samba 2.0.x follow.

Previous Release notes for 2.0.5a


Version 2.0.5a of Samba contains three security bugfixes for problems in previous versions of Samba found by Olaf Kirch of Caldera Systems ("http://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 and 2.0.5a.

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 and 2.0.5a.

There are 5 new parameters in the smb.conf file.

security mask
force security mode
directory security mask
force directory secruty 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 :


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 :


Changes in 2.0.5a

1). Fix for smbd crash bug in string_sub(). smbd was miscalculating memmove lengths on multiple '%' substitutions.
2). Fix for wildcard matching bug for old DOS programs running on Win9x.
3). Fix for Windows NT client changing passwords against a Samba server, intermittently failing.
4). Fix for PPP link being detected as primary interface if using the same IP address as the primary.
5). Ensure smbmount is built with RPM build.

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 ( 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
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
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 :


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 :


Details on obtaining CVS (developer) versions of Samba are available at:


If you think you have found a bug please email a report to :


As always, all bugs are our responsibility.


The Samba Team.