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If we are going to return ID_UNMAPPED later anyway, there's no need to
defer that decision by returning ID_REQUIRE_TYPE first.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15319
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 42dcb3db05530179a991fe58e7b96b52bbbcc607)
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15319
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit c158b075b0b5035615fa8848f1f3d8ef27696861)
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15319
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 57150b463fb8e27c048670f7b4902bd091ee3ae9)
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15319
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 14102b05f3744c67178bd719d41e67fc3e049ee4)
It's always the first function that's called from idmap_methods.
This also demonstrates that we currently always return NT_STATUS_OK,
even if we haven't mapped all map entries.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15319
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 0da13ab3ad7278eafdcd988f39e891242eb46d37)
id_map_ptrs_init() is used in the callers in order to
set everything up as expected.
Other backends also just trust the caller.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15319
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 2cfcff3101fce94b365eccde114432dfa980bbd0)
Only support ~ 50k users per domain.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15319
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
(cherry picked from commit 0f96c4b419a59ea884e68a460910e5c8a45bfcec)
While sids_to_unixids returns ID_TYPE_BOTH mappings,
unixids_to_sids() returns the callers asked for, which
fills gencache with the non ID_TYPE_BOTH mappings.
As a result also the sids_to_unixids fast path via
gencache won't return ID_TYPE_BOTH mappings.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15319
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit 9a24570d3d69f51b6d50bb04b739815ec67c1a3d)
When we see a trusted domain SID for the first time,
idmap_autorid returns ID_REQUIRE_TYPE only for the first sid
and leaves the others with ID_TYPE_NOT_SPECIFIED.
It means the winbindd parent only retries the first sid.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15318
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit a9583b5f96fe3fbf9c1ee545fa868fd705aef3e0)
Most idmap backends don't need access to the domain controllers.
And the related code is not needed for the backends.
Commit 17c86a2c5a5a5e2b194362e5f36f0f99910222c5 changed
the logic of set_domain_online_request() completely!
Instead of triggering a dc probe in the background,
it is now doing a blocking connection.
And doing this in the idmap child is completely useless.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15317
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit ad242a20643c930eb00a8b700f7bd9638f8821a8)
This avoids sending new or reset passwords in the clear
(integrity protected only) from samba-tool in particular.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15315
Signed-off-by: Rob van der Linde <rob@catalyst.net.nz>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
This early return would mistakenly allow an unprivileged user to delete
the dNSHostName attribute by making an LDAP modify request with no
values. We should no longer allow this.
Add or replace operations with no values and no privileges are
disallowed.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15276
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15276
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
* CVE-2023-0614 Not-secret but access controlled LDAP attributes can be discovered (bug 15270)
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Setting the LDB_HANDLE_FLAG_UNTRUSTED tells the acl_read module to operate on this request.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
The chain for transitive evaluation does consider ACLs, avoiding the disclosure of
confidential information.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
This will allow our dsdb helper search functions to mark the new
request as untrusted, forcing read ACL evaluation (per current behaviour).
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
In the unlikely case that someone adds a confidential indexed attribute
to the schema, LDAP search expressions on that attribute could disclose
information via timing differences. Let's not use the index for searches
on confidential attributes.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Redaction may be expensive if we end up needing to fetch a security
descriptor to verify rights to an attribute. Checking the search scope
is probably cheaper, so do that first.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This makes it less likely that we forget to handle a case.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
If the AS_SYSTEM control is present, we know we have system privileges,
and have no need to call dsdb_module_am_system().
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Add a hook, acl_redact_msg_for_filter(), in the aclread module, that
marks inaccessible any message elements used by an LDAP search filter
that the user has no right to access. Make the various ldb_match_*()
functions check whether message elements are accessible, and refuse to
match any that are not. Remaining message elements, not mentioned in the
search filter, are checked in aclread_callback(), and any inaccessible
elements are removed at this point.
Certain attributes, namely objectClass, distinguishedName, name, and
objectGUID, are always present, and hence the presence of said
attributes is always allowed to be checked in a search filter. This
corresponds with the behaviour of Windows.
Further, we unconditionally allow the attributes isDeleted and
isRecycled in a check for presence or equality. Windows is not known to
make this special exception, but it seems mostly harmless, and should
mitigate the performance impact on searches made by the show_deleted
module.
As a result of all these changes, our behaviour regarding confidential
attributes happens to match Windows more closely. For the test in
confidential_attr.py, we can now model our attribute handling with
DC_MODE_RETURN_ALL, which corresponds to the behaviour exhibited by
Windows.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
These variables are often used together, and it is useful to have the
setup code in one place.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This function parses a SID from an ldb_message, similar to
samdb_result_dom_sid(), but does it without allocating anything.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
DSDB_CONTROL_CALCULATED_DEFAULT_SD_OID was added in commit
08187833fee57a8dba6c67546dfca516cd1f9d7a.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The object returned by schema_format_value() is a bytes object.
Therefore the search expression would resemble:
(lastKnownParent=<GUID=b'00000000-0000-0000-0000-000000000000'>)
which, due to the extra characters, would fail to match anything.
Fix it to be:
(lastKnownParent=<GUID=00000000-0000-0000-0000-000000000000>)
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
In extended_dn_fix_filter() we had:
req->op.search.tree = ldb_parse_tree_copy_shallow(req, req->op.search.tree);
which overwrote the parse tree on an existing ldb request with a fixed
up tree. This became a problem if a module performed another search with
that same request structure, as extended_dn_in would try to fix up the
already-modified tree for a second time. The fixed-up tree element now
having an extended DN, it would fall foul of the ldb_dn_match_allowed()
check in extended_dn_filter_callback(), and be replaced with an
ALWAYS_FALSE match rule. In practice this meant that <GUID={}> searches
would only work for one search in an ldb request, and fail for
subsequent ones.
Fix this by creating a new request with the modified tree, and leaving
the original request unmodified.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Change all uses of ldb_kv_filter_attrs() to use
ldb_filter_attrs_in_place() instead. This function does less work than
its predecessor, and no longer requires the allocation of a second ldb
message. Some of the work is able to be split out into separate
functions that each accomplish a single task, with a purpose to make the
code clearer.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
ldb_filter_attrs() previously did too much. Now its replacement,
ldb_filter_attrs_in_place(), only does the actual filtering, while
taking ownership of each element's values is handled in a separate
function, ldb_msg_elements_take_ownership().
Also, ldb_filter_attrs_in_place() no longer adds the distinguishedName
to the message if it is missing. That is handled in another function,
ldb_msg_add_distinguished_name().
As we're now modifying the original message rather than copying it into
a new one, we no longer need the filtered_msg parameter.
We adapt a test, based on ldb_filter_attrs_test, to exercise the new
function.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
At present this function is an exact duplicate of ldb_filter_attrs(),
but in the next commit we shall modify it to work in place, without the
need for the allocation of a second message.
The test is a near duplicate of the existing test for
ldb_filter_attrs().
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Many places in Samba depend upon various components of an ldb message
being talloc allocated, and hence able to be used as talloc contexts.
The elements and values of an unpacked ldb message point to unowned data
inside the memory-mapped database, and this function ensures that such
messages have talloc ownership of said elements and values.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Add ldb_filter_attrs_test to the list of tests so that it actually gets
run.
Remove a duplicate ldb_msg_test that was accidentally added in commit
5ca90e758ade97fb5e335029c7a1768094e70564.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
If the value of an ldb message element is not zero-terminated, calling
ldb_msg_find_attr_as_string() will cause the function to read off the
end of the buffer in an attempt to verify that the value is
zero-terminated. This can cause unexpected behaviour and make the test
randomly fail.
To avoid this, we must have a terminating null byte that is *not*
counted as part of the length, and so we must calculate the length with
strlen() rather than sizeof.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
It is better to explicitly abort than to dereference a NULL pointer or
try to read data cast to the wrong type.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This changes the slow aspect to be the object matching not the filter parsing.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
This reduces the elapsed time to 6m from 20m on my laptop.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15332
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Mar 14 07:16:04 UTC 2023 on atb-devel-224
(cherry picked from commit b4a6c054ec6acefacd22cb7230a783d20cb07c05)
[abartlet@samba.org Included in the security release as this
makes working on the large_ldap test practical by reducing
the elapsed time taken]
