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mirror of https://github.com/samba-team/samba.git synced 2024-12-24 21:34:56 +03:00
Commit Graph

5173 Commits

Author SHA1 Message Date
Joseph Sutton
23a67d59c8 s4-dsdb:large_ldap: Remove unused variables
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-16 23:29:32 +00:00
Joseph Sutton
db5ef4e2ba s4-dsdb:large_ldap: Remove unused imports
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-16 23:29:32 +00:00
Joseph Sutton
2d1d3b7314 pytest/password_lockout: Remove unused variables
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-16 23:29:32 +00:00
Joseph Sutton
2b598a4b2e pytest/password_lockout: Use correct variable
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-16 23:29:32 +00:00
Joseph Sutton
b5ff085952 pytest/password_lockout: Use more specific assertion methods
These methods produce better error messages if an assertion fails.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-16 23:29:32 +00:00
Joseph Sutton
2236daa7ca pytest/password_lockout: Remove unused imports
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-16 23:29:32 +00:00
Joseph Sutton
3eb95c8791 s4:dsdb:tests: Refactor security descriptor test
Use more specific unittest methods.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-16 23:29:32 +00:00
Joseph Sutton
2e5d08c908 s4:dsdb:tests: Refactor confidential attributes test
Use more specific unittest methods, and remove unused code.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-16 23:29:32 +00:00
Joseph Sutton
76b15ec145 s4:dsdb:tests: Refactor ACL test
Use more specific unittest methods; remove some unused variables.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-16 23:29:32 +00:00
Rob van der Linde
3eccaf5d1e s4/dsdb: fix unnecessary backslash
Signed-off-by: Rob van der Linde <rob@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-05 04:58:30 +00:00
Rob van der Linde
bb34d93277 dsdb/tests: fix assignment to for loop variable
because the loop variables are all called 'k' and the inner and outer loop both use 'k'.

Signed-off-by: Rob van der Linde <rob@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-05 04:58:30 +00:00
Joseph Sutton
c7295b1dc5 pydsdb: Add Managed Service Accounts GUID constant
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-05 02:54:31 +00:00
Joseph Sutton
07f3dbbf38 s4:dsdb: Fix leak
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-05-05 02:54:31 +00:00
Douglas Bagnall
4c1d9e92e1 pytest:large_ldap: use a valid ACE
Real ACEs don't have {} around their GUIDs. This will soon be banned.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-28 02:15:36 +00:00
Joseph Sutton
03bd1b8ee9 s4-dsdb: Handle allocation failure
If a talloc function returns NULL, indicating failure, the failure could
be masked by the next talloc call allocating on the NULL context.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Joseph Sutton
12d990ac9f s4-acl: Make parameter const
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Joseph Sutton
047214be29 s4/dsdb/cracknames: Remove unneeded attribute
The cracknames code never uses this.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Joseph Sutton
dc7911e76b s4-dsdb: Check correct ldb opaque variable
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Joseph Sutton
0ec0a04dc1 s4-dsdb: Remove is_attr_in_list()
ldb_attr_in_list() already exists and does essentially the same thing.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Joseph Sutton
6f2bccf1f4 s4/dsdb/util: Make some arrays static
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Joseph Sutton
52e626a8d0 pytest/acl: Remove unused remnants of source4/dsdb/tests/python/acl.py
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Joseph Sutton
7cb9620fc4 s4-dsdb:large_ldap: Note that we don't check that an error was raised
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Joseph Sutton
ec069f1b3d s4-dsdb:large_ldap: Assert that we got all the entries
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Joseph Sutton
5f24d0adc7 s4-dsdb:large_ldap: Fix disabled test
This test was silently skipped due to setUpClass() throwing a NameError.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Joseph Sutton
1cf1e6889e s4-dsdb:large_ldap: Correctly increment count variable
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Joseph Sutton
911f607ecd s4-dsdb:large_ldap: Fix typos in variable names
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2023-04-12 13:52:31 +00:00
Rob van der Linde
112faff82f dsdb: modify unicodePwd requires encrypted connection
Signed-off-by: Rob van der Linde <rob@catalyst.net.nz>
Reviewed-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): Thu Apr  6 01:33:05 UTC 2023 on atb-devel-224
2023-04-06 01:33:05 +00:00
Rob van der Linde
928de1d61c dsdb/tests: Add test for modification of unicodePwd over a cleartext/signed connection
This demonstrates that the server did not detect CVE-2023-0922

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Rob van der Linde <rob@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2023-04-06 00:33:35 +00:00
Rob van der Linde
5abda27f0e dsdb: fix spelling in password_hash.c
Signed-off-by: Rob van der Linde <rob@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2023-04-06 00:33:35 +00:00
Andrew Bartlett
479634e4cd dsdb/tests: Double number of expressions in large_ldap.py ldap_timeout test
By slowing the filter down more this makes the test reliable on the
autobuild host.

This is not a long-term solution, but is a quick tweak that can be done
today to address current issues with getting commits past the host-based
(compared with cloud-based) autobuild.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15351

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2023-04-06 00:33:35 +00:00
Andrew Bartlett
e1c0c2066c dsdb/tests: Move SD modification on class-created objects to classSetUp
These modifications persist, so should be done at the class level,
not in the test.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15351

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2023-04-06 00:33:34 +00:00
Joseph Sutton
c33e78a27f CVE-2023-0225 s4-acl: Don't return early if dNSHostName element has no values
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>
2023-04-05 02:10:35 +00:00
Douglas Bagnall
62cc4302b6 CVE-2023-0225 pytest/acl: test deleting dNSHostName as unprivileged user
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
8b4e6f7b3f s4-dsdb: Remove DSDB_ACL_CHECKS_DIRSYNC_FLAG
It's no longer used anywhere.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-04-05 02:10:35 +00:00
Andrew Bartlett
82d2ec786f dsdb: Remove remaining references to DC_MODE_RETURN_NONE and DC_MODE_RETURN_ALL
The confidential_attrs test no longer uses DC_MODE_RETURN_NONE we can now
remove the complexity.

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>
2023-04-05 02:10:35 +00:00
Andrew Bartlett
f188b6a978 CVE-2023-0614 dsdb: Add DSDB_MARK_REQ_UNTRUSTED
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
15eac7676b CVE-2023-0614 s4-dsdb: Treat confidential attributes as unindexed
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
197633cc2a CVE-2023-0614 ldb: Use binary search to check whether attribute is secret
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
3a70c6464d CVE-2023-0614 s4-acl: Avoid calling dsdb_module_am_system() if we can help it
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
d5d0e71279 CVE-2023-0614 ldb: Prevent disclosure of confidential attributes
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
748bbbe70d CVE-2023-0614 s4-acl: Split out function to set up access checking variables
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
da8138c50e CVE-2023-0614 s4-dsdb: Add samdb_result_dom_sid_buf()
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
5c334918a2 CVE-2023-0614 s4-acl: Split out logic to remove access checking 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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
f995c3805d CVE-2023-0614 tests/krb5: Add test for confidential attributes timing differences
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
d3fa2cb5dd CVE-2023-0614 s4:dsdb:tests: Fix <GUID={}> search in confidential attributes test
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
f154fad3c1 CVE-2023-0614 s4:dsdb/extended_dn_in: Don't modify a search tree we don't own
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
a43977499c CVE-2023-0614 s4-acl: Use ldb functions for handling inaccessible message elements
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
17feef18bf CVE-2023-0614 s4-acl: Make some parameters const
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>
2023-04-05 02:10:35 +00:00
Joseph Sutton
a7222faade CVE-2023-0614 s4:dsdb: Use talloc_get_type_abort() more consistently
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>
2023-04-05 02:10:35 +00:00
Andrew Bartlett
5fd0811ffa CVE-2023-0614 dsdb: Alter timeout test in large_ldap.py to be slower by matching on large objects
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>
2023-04-05 02:10:34 +00:00