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Commit Graph

3266 Commits

Author SHA1 Message Date
Joseph Sutton
73a4806346 tests/krb5: Add tests for renewal and validation of RODC TGTs with PAC requests
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Joseph Sutton
690a00a40c kdc: Always add the PAC if the header TGT is from an RODC
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Joseph Sutton
b6a25f5f01 kdc: Match Windows error code for mismatching sname
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Joseph Sutton
bac5f75059 tests/krb5: Add test for S4U2Self with wrong sname
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Joseph Sutton
d5d22bf84a kdc: Adjust SID mismatch error code to match Windows
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Joseph Sutton
f7a2fef8f4 heimdal:kdc: Adjust no-PAC error code to match Windows
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Joseph Sutton
ca80c47406 tests/krb5: Add tests for validation with requester SID PAC buffer
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Joseph Sutton
ebc9137cee tests/krb5: Align PAC buffer checking to more closely match Windows with PacRequestorEnforcement=2
We set EXPECT_EXTRA_PAC_BUFFERS to 0 for the moment. This signifies that
these checks are currently not enforced, which avoids a lot of test
failures.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Joseph Sutton
ec823c2a83 tests/krb5: Add TGS-REQ tests with FAST
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Joseph Sutton
778029c1dc tests/krb5: Add tests for TGS requests with a non-TGT
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Joseph Sutton
7574ba9f58 tests/krb5: Add tests for invalid TGTs
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Joseph Sutton
d95705172b tests/krb5: Adjust error codes to better match Windows with PacRequestorEnforcement=2
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-30 02:42:31 +00:00
Isaac Boukris
90febd2a33 s4:mit-kdb: Force canonicalization for looking up principals
See also
ac8865a221

Pair-Programmed-With: Andreas Schneider <asn@samba.org>
Signed-off-by: Isaac Boukris <iboukris@gmail.com>
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>

Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Mon Nov 29 09:32:26 UTC 2021 on sn-devel-184
2021-11-29 09:32:25 +00:00
Andreas Schneider
28be1acd8e mit-kdc: Use more strict KDC default settings
As we require MIT KRB5 >= 1.19 for the KDC, use more secure defaults.

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
2021-11-29 08:39:37 +00:00
Andrew Bartlett
1d5b155619 CVE-2021-3670 ldb: Confirm the request has not yet timed out in ldb filter processing
The LDB filter processing is where the time is spent in the LDB stack
but the timeout event will not get run while this is ongoing, so we
must confirm we have not yet timed out manually.

RN: Ensure that the LDB request has not timed out during filter processing
as the LDAP server MaxQueryDuration is otherwise not honoured.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14694

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
2021-11-25 01:41:30 +00:00
Joseph Sutton
dcfcafdbf7 CVE-2021-3670 tests/krb5/test_ldap.py: Add test for LDAP timeouts
We allow a timeout of 2x over to avoid this being a flapping test.
Samba is not very accurate on the timeout, which is not otherwise an
issue but makes this test fail sometimes.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14694

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
2021-11-25 01:41:30 +00:00
Volker Lendecke
cdc0268c19 cmdline: Make -P work in clustered mode
Bug: https://bugzilla.samba.org/show_bug.cgi?id=14908
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>

Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Wed Nov 17 18:29:09 UTC 2021 on sn-devel-184
2021-11-17 18:29:09 +00:00
Volker Lendecke
9faa317319 selftest: Add reproducer for bug 14908
Bug: https://bugzilla.samba.org/show_bug.cgi?id=14908
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
2021-11-17 17:41:30 +00:00
Douglas Bagnall
fccb105e07 pytests: check that we don't have bad format characters
Unicode has format control characters that affect the appearance —
including the apparent order — of other characters. Some of these,
like the bidi controls (for mixing left-to-right scripts with
right-to-left scripts) can be used make text that means one thing look
very much like it means another thing.

The potential for duplicity using these characters has recently been
publicised under the name “Trojan Source”, and CVE-2021-42694. A
specific example, as it affects the Rust language is CVE-2021-42574.

We don't have many format control characters in our code — in fact,
just the non-breaking space (\u200b) and the redundant BOM thing
(\ufeff), and this test aims to ensure we keep it that way.

The test uses a series of allow-lists and deny-lists to check most
text files for unknown format control characters. The filtering is
fairly conservative but not exhaustive. For example, XML and text
files are checked, but UTF-16 files are not.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Ralph Boehme <slow@samba.org>
2021-11-17 04:36:36 +00:00
Andrew Bartlett
0a546be052 CVE-2020-25717: s3:auth: Fallback to a SID/UID based mapping if the named based lookup fails
Before the CVE-2020-25717 fixes we had a fallback from
getpwnam('DOMAIN\user') to getpwnam('user') which was very dangerous and
unpredictable.

Now we do the fallback based on sid_to_uid() followed by
getpwuid() on the returned uid.

This obsoletes 'username map [script]' based workaround adviced
for CVE-2020-25717, when nss_winbindd is not used or
idmap_nss is actually used.

In future we may decide to prefer or only do the SID/UID based
lookup, but for now we want to keep this unchanged as much as possible.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14901

Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>

[metze@samba.org moved the new logic into the fallback codepath only
 in order to avoid behavior changes as much as possible]
Reviewed-by: Ralph Boehme <slow@samba.org>

Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Mon Nov 15 19:01:56 UTC 2021 on sn-devel-184
2021-11-15 19:01:56 +00:00
Joseph Sutton
494bf7de6f CVE-2020-25717: tests/krb5: Add a test for idmap_nss mapping users to SIDs
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14901

Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Signed-off-by: Stefan Metzmacher <metze@samba.org>

[metze@samba.org removed unused tests for a feature that
 was removed before merging]
Reviewed-by: Ralph Boehme <slow@samba.org>
2021-11-15 18:10:28 +00:00
Joseph Sutton
8a9f2aa2c1 CVE-2020-25717: selftest: turn ad_member_no_nss_wb into ad_member_idmap_nss
In reality environments without 'nss_winbind' make use of 'idmap_nss'.

For testing, DOMAIN/bob is mapped to the local 'bob',
while DOMAIN/jane gets the uid based on the local 'jane'
vis idmap_nss.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14901

Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Signed-off-by: Stefan Metzmacher <metze@samba.org>

[metze@samba.org avoid to create a new ad_member_idmap_nss environment
and merge it with ad_member_no_nss_wb instead]
Reviewed-by: Ralph Boehme <slow@samba.org>
2021-11-15 18:10:28 +00:00
Stefan Metzmacher
af6151ef12 CVE-2021-3738 s4:rpc_server/drsuapi: make use of assoc_group aware dcesrv_samdb_connect_as_*() helpers
This avoids a crash that's triggered by windows clients using
DsCrackNames across multiple connections within an association group
on the same DsBind context(policy) handle.

It also improves the auditing for the dcesrv_samdb_connect_as_system() case.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14468

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Stefan Metzmacher
b9deab4ca4 CVE-2021-3738 s4:torture/drsuapi: DsBindAssocGroup* tests
This adds a reproducer for an invalid memory access, when
using the context handle from DsBind across multiple connections
within an association group.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14468

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Stefan Metzmacher
871d672f51 CVE-2021-23192: dcesrv_core: only the first fragment specifies the auth_contexts
All other fragments blindly inherit it.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14875

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Samuel Cabrero <scabrero@samba.org>
2021-11-09 19:45:34 +00:00
Stefan Metzmacher
9ebc679e76 CVE-2021-23192: python/tests/dcerpc: add tests to check how security contexts relate to fragmented requests
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14875

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Samuel Cabrero <scabrero@samba.org>
2021-11-09 19:45:34 +00:00
Joseph Sutton
5f46343101 CVE-2020-25722 selftest: Ensure check for duplicate servicePrincipalNames is not bypassed for an add operation
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14564

If one of the objectClass checks passed, samldb_add() could return
through one of the samldb_fill_*() functions and skip the
servicePrincipalName uniqueness checking.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2021-11-09 19:45:34 +00:00
Joseph Sutton
ae47a73077 CVE-2020-25722 selftest: Add test for duplicate servicePrincipalNames on an add operation
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14564

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2021-11-09 19:45:34 +00:00
Joseph Sutton
fa65ceb3dc CVE-2020-25718 heimdal:kdc: Add comment about tests for tickets of users not revealed to an RODC
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14886

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Joseph Sutton
f5baabd987 CVE-2020-25719 tests/krb5: Add tests for using a ticket with a renamed account
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14561

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Joseph Sutton
756934f14c CVE-2020-25719 heimdal:kdc: Require PAC to be present
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14686

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Andrew Bartlett
4888e19811 CVE-2020-25722 kdc: Do not honour a request for a 3-part SPN (ending in our domain/realm) unless a DC
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14776

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2021-11-09 19:45:34 +00:00
Joseph Sutton
49a13f0fc9 CVE-2020-25719 heimdal:kdc: Verify PAC in TGT provided for user-to-user authentication
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14873

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Joseph Sutton
f08e6ac862 CVE-2020-25719 heimdal:kdc: Check name in request against name in user-to-user TGT
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14873

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Joseph Sutton
fd50fecbe9 CVE-2020-25719 heimdal:kdc: Use sname from request rather than user-to-user TGT client name
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14873

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Joseph Sutton
1d3548aeff CVE-2020-25719 s4:kdc: Add KDC support for PAC_REQUESTER_SID PAC buffer
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14561

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Andrew Bartlett
a3aee582a5 CVE-2020-25722 Ensure the structural objectclass cannot be changed
If the structural objectclass is allowed to change, then the restrictions
locking an object to remaining a user or computer will not be enforcable.

Likewise other LDAP inheritance rules, which allow only certain
child objects can be bypassed, which can in turn allow creation of
(unprivileged) users where only DNS objects were expected.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14753
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14889

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2021-11-09 19:45:34 +00:00
Andrew Bartlett
43983170fc CVE-2020-25721 auth: Fill in the new HAS_SAM_NAME_AND_SID values
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14835

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2021-11-09 19:45:34 +00:00
Joseph Sutton
80257fa37c CVE-2020-25718 kdc: Return ERR_POLICY if RODC krbtgt account is invalid
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14558

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Andrew Bartlett
b176ddba2a CVE-2020-25718 kdc: Confirm the RODC was allowed to issue a particular ticket
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14558

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2021-11-09 19:45:34 +00:00
Joseph Sutton
bacb51d0d3 CVE-2020-25719 heimdal:kdc: Require authdata to be present
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14686

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Joseph Sutton
2f9245f2a5 CVE-2020-25719 s4:kdc: Add KDC support for PAC_ATTRIBUTES_INFO PAC buffer
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14561

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Andreas Schneider
0db5c69d29 CVE-2020-25719 s4:kdc: Check if the pac is valid before updating it
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14561

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Andreas Schneider
435719185c CVE-2020-25719 mit-samba: Rework PAC handling in kdb_samba_db_sign_auth_data()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14561

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:34 +00:00
Joseph Sutton
fa4c9bcefd CVE-2020-25719 s4/torture: Expect additional PAC buffers
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14561

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:33 +00:00
Joseph Sutton
a461b7d4f8 CVE-2020-25719 tests/krb5: Add tests for mismatched names with user-to-user
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14873

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:33 +00:00
Joseph Sutton
26480ba2aa CVE-2020-25719 tests/krb5: Add test for user-to-user with no sname
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14873

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:33 +00:00
Joseph Sutton
7ff05eb8d4 CVE-2020-25719 tests/krb5: Add tests for requester SID PAC buffer
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14561

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:33 +00:00
Joseph Sutton
2e1e57fca8 CVE-2020-25719 tests/krb5: Add tests for PAC-REQUEST padata
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14561

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:33 +00:00
Joseph Sutton
b8c85fe81c CVE-2020-25719 tests/krb5: Add tests for PAC attributes buffer
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14561

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2021-11-09 19:45:33 +00:00