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gpfs_set_times as of August 2020 stores 32-bit unsigned tv_sec. We
should not silently garble time stamps but reject the attempt to set
an out-of-range timestamp.
Bug: https://bugzilla.samba.org/show_bug.cgi?id=15151
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Christof Schmitt <cs@samba.org>
(cherry picked from commit b954d181cd)
All of its callers, where necessary, take out a transaction covering the
entire password set or change operation, so a transaction is no longer
needed here.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 7981cba87e)
Autobuild-User(v4-16-test): Jule Anger <janger@samba.org>
Autobuild-Date(v4-16-test): Sun Sep 18 17:46:29 UTC 2022 on sn-devel-184
This will be used in the following commits.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit a246ae993f)
Now the initial account search is performed under the transaction,
ensuring the overall password change is atomic. We set DSDB_SESSION_INFO
to drop our privileges to those of the user before we perform the actual
password change, and restore them afterwards if we need to update the
bad password count.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit fcabcb326d)
[jsutton@samba.org Included dsdb/common/util.h header for
DSDB_SESSION_INFO define]
This ensures these calls are not optimised away.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 1258746ba8)
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 6edf88f5c4)
[jsutton@samba.org Removed change to decode_pwd_string_from_buffer514()
that is not present in 4.16]
Panic if memset_s() fails.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 03a50d8f7d)
The bad password count is supposed to limit the number of failed login
attempt a user can make before being temporarily locked out, but race
conditions between processes have allowed determined attackers to make
many more than the specified number of attempts. This is especially
bad on constrained or overcommitted hardware.
To fix this, once a bad password is detected, we reload the sam account
information under a user-specific mutex, ensuring we have an up to
date bad password count.
Derived from a similar patch to source3/auth/check_samsec.c by
Jeremy Allison <jra@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 65c473d4a5)
The bad password count is supposed to limit the number of failed login
attempt a user can make before being temporarily locked out, but race
conditions between processes have allowed determined attackers to make
many more than the specified number of attempts. This is especially
bad on constrained or overcommitted hardware.
To fix this, once a bad password is detected, we reload the sam account
information under a user-specific mutex, ensuring we have an up to
date bad password count.
Discovered by Nathaniel W. Turner.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 8587734bf9)
This may return an error if we find the account is locked out.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 268ea7bef5)
If the account has been locked out in the meantime (indicated by
NT_STATUS_ACCOUNT_LOCKED_OUT), we should return the appropriate error
code.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit a268a1a0e3)
If the account has been locked out in the meantime (indicated by
NT_STATUS_ACCOUNT_LOCKED_OUT), we should return the appropriate error
code.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit bdfc9d96f8)
[jsutton@samba.org Fixed knownfail conflicts due to not having claims
tests]
[jsutton@samba.org Fixed knownfail conflicts]
If we find that the user has been locked out sometime during the request
(due to a race), we will now return an error code.
Note that we cannot avoid the MIT KDC aspect of the issue by checking
the return status of mit_samba_zero_bad_password_count(), because
kdb_vftabl::audit_as_req() returning void means we cannot pass on the
result.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit b1e740896e)
This simplifies the code for the following commit.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 2b593c34c4)
We reread the account details inside the transaction in case the account
has been locked out in the meantime. If it has, we return the
appropriate error code.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 96479747bd)
[jsutton@samba.org Fixed conflict due to lack of dbg_ret variable]
Previously, there was a gap between calling dsdb_update_bad_pwd_count()
and dsdb_module_modify() where no transaction was in effect. Another
process could slip in and modify badPwdCount, only for our update to
immediately overwrite it. Doing the update inside the transaction will
help for the following commit when we make it atomic.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit a65147a9e9)
[jsutton@samba.org Fixed conflicts due to lack of dbg_ret variable]
The error code may be NT_STATUS_ACCOUNT_LOCKED_OUT, which we use in
preference to NT_STATUS_WRONG_PASSWORD.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit d8a862cb81)
These variables are not important to protect against a race with
and a double-read can easily be avoided by moving them up the file
a little.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit b5f78b7b89)
By bringing this function inline it can then be split out in a
subsequent commit.
Based on work by Gary Lockyer <gary@catalyst.net.nz>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 712181032a)
authsam_calculate_lastlogon_sync_interval() is split out of authsam_update_lastlogon_timestamp()
Based on work by Gary Lockyer <gary@catalyst.net.nz>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 55147335ae)
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit b954acfde2)
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 4a9e0fdccf)
Ensure that the bad password count is incremented atomically,
and that the successful logon accounting data is updated atomically.
Use bad password indicator (in a distinct TDB) to determine if to open a transaction
We open a transaction when we have seen the hint that this user
has recorded a bad password. This allows us to avoid always
needing one, while not missing a possible lockout.
We also go back and get a transation if we did not take out
one out but we chose to do a write (eg for lastLogonTimestamp)
Based on patches by Gary Lockyer <gary@catalyst.net.nz>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit de4cc0a3da)
This is more specific than NT_STATUS_UNSUCCESSFUL, and for the SAMR
password change, matches the result the call to samdb_result_passwords()
would give.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 336e303cf1)
cmocka unit tests for the authsam_reread_user_logon_data in
source4/auth/sam.c
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit d6cf245b96)
As is, this is pointless, as we need a transaction to make this
any less of a race, but this provides the steps towards that goal.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 7b8e32efc3)
To ensure that the bad password count is incremented atomically,
and that the successful logon accounting data is updated atomically,
without always opening a transaction, we will need to make a note
of all bad and successful passwords in a side-DB outside the
transaction lock.
This provides the functions needed for that and hooks them in
(future commits will handle errors and use the results).
Based on patches by Gary Lockyer <gary@catalyst.net.nz>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 408717242a)
samdb_result_msds_LockoutObservationWindow() is split out of
samdb_result_effective_badPwdCount()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 2087b0cd98)
This helps the bad password and audit log handling code as it
allows assumptions to be made about the attributes found in
the variable "msg", such as that DSDB_SEARCH_SHOW_EXTENDED_DN
was used.
This ensures we can re-search on the DN via the embedded GUID,
which in in turn rename-proof.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 439f96a2cf)
[jsutton@samba.org Adapted to LM hash still being present]
Running the password lockout tests on Fedora 35 occasionally results in
errors similar to the following:
[1(0)/1 at 0s] samba.tests.krb5.lockout_tests(ad_dc:local)
EPOLL_CTL_DEL EBADF for fde[0x5569dc76c670] mpx_fde[(nil)] fd[14] - disabling
EPOLL_CTL_DEL EBADF for fde[0x5569dc6089c0] mpx_fde[(nil)] fd[14] - disabling
EPOLL_CTL_DEL EBADF for fde[0x5569dbbe58e0] mpx_fde[(nil)] fd[14] - disabling
UNEXPECTED(error): samba.tests.krb5.lockout_tests.samba.tests.krb5.lockout_tests.LockoutTests.test_lockout_race_kdc(ad_dc:local)
REASON: Exception: Exception: concurrent.futures.process._RemoteTraceback:
"""
Traceback (most recent call last):
File "/usr/lib64/python3.10/concurrent/futures/process.py", line 243, in _process_worker
r = call_item.fn(*call_item.args, **call_item.kwargs)
File "/home/samba/src/bin/python/samba/tests/krb5/lockout_tests.py", line 141, in connect_kdc
pipe.send_bytes(b'0')
File "/usr/lib64/python3.10/multiprocessing/connection.py", line 205, in send_bytes
self._send_bytes(m[offset:offset + size])
File "/usr/lib64/python3.10/multiprocessing/connection.py", line 416, in _send_bytes
self._send(header + buf)
File "/usr/lib64/python3.10/multiprocessing/connection.py", line 373, in _send
n = write(self._handle, buf)
OSError: [Errno 9] Bad file descriptor
"""
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/home/samba/src/bin/python/samba/tests/krb5/lockout_tests.py", line 537, in test_lockout_race_kdc
self.do_lockout_race(connect_kdc)
File "/home/samba/src/bin/python/samba/tests/krb5/lockout_tests.py", line 863, in do_lockout_race
self.wait_for_ready(our_pipe, connect_future)
File "/home/samba/src/bin/python/samba/tests/krb5/lockout_tests.py", line 471, in wait_for_ready
raise exception
OSError: [Errno 9] Bad file descriptor
Such messages can be seen to come from epoll_del_event(). By resorting
to lower-level facilites such as fork() and OS pipes, we lose helpful
features such as timeouts and propagation of exceptions from child
processes, but we may avoid interactions with the event system that lead
to failures.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 91e2e5616c)
[jsutton@samba.org Fixed conflicts in usage.py, knownfails, and tests.py
due to not having claims tests]
[jsutton@samba.org Removed tests for unsupported SAMR AES password
change, removed related GNUTLS_PBKDF2_SUPPORT environment variable, and
fixed knownfail conflicts; marked all password lockout tests as
flapping due to sporadic failures seen with Fedora 35]
This lets us access MD4, which might not be available in hashlib, from
Python. This function is used in a following commit for hashing a
password to obtain the verifier for a SAMR password change.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 17b8d164f6)
This lets us access single-DES from Python. This function is used in a
following commit for encrypting an NT hash to obtain the verifier for a
SAMR password change.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14611
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit b27a67af02)
[jsutton@samba.org Fixed wscript conflict introduced by commit
61aeb77407]
Fixes a regression introduced by the fixes for bug 15126 where we crash in
vfs_default in vfswrap_stat():
assert failed: !is_named_stream(smb_fname)
The frontend calls into the VFS from build_stream_path() with a stream path
without checking if the share supports streams.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15126
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15161
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
[slow@samba.org: change from master adapted for unix_convert()]
Autobuild-User(v4-16-test): Jule Anger <janger@samba.org>
Autobuild-Date(v4-16-test): Tue Sep 6 08:49:51 UTC 2022 on sn-devel-184
This is what a Windows server returns. Tested with a share residing on a FAT
formatted drive, a Windows filesystem that doesn't support streams.
Combinations tested:
file::$DATA
file:stream
file:stream:$DATA
All three fail with NT_STATUS_OBJECT_NAME_INVALID.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15126
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15161
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
(cherry picked from commit 201e1969bf)
The spec lists the following as requiring special access:
- for requiring FILE_READ_ATTRIBUTES:
FileBasicInformation
FileAllInformation
FileNetworkOpenInformation
FileAttributeTagInformation
- for requiring FILE_READ_EA:
FileFullEaInformation
All other infolevels are unrestricted.
We ignore the IPC related infolevels:
FilePipeInformation
FilePipeLocalInformation
FilePipeRemoteInformation
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15153
RN: Missing SMB2-GETINFO access checks from MS-SMB2 3.3.5.20.1
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Tue Aug 23 12:54:08 UTC 2022 on sn-devel-184
(cherry picked from commit 6d493a9d56)
smb2_composite_setpathinfo() uses SEC_FLAG_MAXIMUM_ALLOWED which can
have unwanted side effects like breaking oplocks if the effective access
includes [READ|WRITE]_DATA.
For changing the DOS attributes we only need SEC_FILE_WRITE_ATTRIBUTE. With this
change test_smb2_oplock_batch25() doesn't trigger an oplock break anymore.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15153
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit 66e40690bd)
We're now consistently passing the base_fsp to SMB_VFS_FSET_DOS_ATTRIBUTES(), so
we don't need to check for a stream_fsp here anymore.
Additionally vfs_default will assert a non-stream fsp inside
vfswrap_fgetxattr(), so in case any caller wrongly passes a stream fsp, this is
caught in vfs_default.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15126
MR: https://gitlab.com/samba-team/samba/-/merge_requests/2643
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit 968a5ae89f)
Commit d71ef1365cdde47aeb3465699181656b0655fa04 caused a regression where the
creation date on streams wasn't updated anymore on the stream fsp.
By adding a simple wrapper vfs_fget_dos_attributes() that takes care of
- passing only the base_fsp to the VFS, so the VFS can be completely agnostic of
all the streams related complexity like fake fds,
- propagating any updated btime from the base_fsp->fsp_name to the
stream_fsp->fsp_name
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15126
MR: https://gitlab.com/samba-team/samba/-/merge_requests/2643
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(backported from commit 3f7d8db994)
[slow@samba.org: also update itime and file_id]
