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Commit Graph

125617 Commits

Author SHA1 Message Date
Joseph Sutton
69e742e620 s4:kpasswd: Restructure code for clarity
View with 'git show -b'.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:02 +02:00
Joseph Sutton
6c4fd575d7 CVE-2022-2031 s4:kpasswd: Require an initial ticket
Ensure that for password changes the client uses an AS-REQ to get the
ticket to kpasswd, and not a TGS-REQ.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>

[jsutton@samba.org Removed MIT KDC 1.20-specific knownfails]
2022-07-24 11:42:02 +02:00
Joseph Sutton
198256e218 CVE-2022-2031 gensec_krb5: Add helper function to check if client sent an initial ticket
This will be used in the kpasswd service to ensure that the client has
an initial ticket to kadmin/changepw, and not a service ticket.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:02 +02:00
Joseph Sutton
cf749fac34 CVE-2022-2031 s4:kpasswd: Return a kpasswd error code in KRB-ERROR
If we attempt to return an error code outside of Heimdal's allowed range
[KRB5KDC_ERR_NONE, KRB5_ERR_RCSID), it will be replaced with a GENERIC
error, and the error text will be set to the meaningless result of
krb5_get_error_message(). Avoid this by ensuring the error code is in
the correct range.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:02 +02:00
Joseph Sutton
cf9e376044 CVE-2022-2031 lib:krb5_wrap: Generate valid error codes in smb_krb5_mk_error()
The error code passed in will be an offset from ERROR_TABLE_BASE_krb5,
so we need to subtract that before creating the error. Heimdal does this
internally, so it isn't needed there.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:02 +02:00
Joseph Sutton
3a8da51396 CVE-2022-2031 s4:kpasswd: Don't return AP-REP on failure
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>

[jsutton@samba.org Removed MIT KDC 1.20-specific knownfails]
2022-07-24 11:42:02 +02:00
Joseph Sutton
29ec8b2369 CVE-2022-2031 s4:kpasswd: Correctly generate error strings
The error_data we create already has an explicit length, and should not
be zero-terminated, so we omit the trailing null byte. Previously,
Heimdal builds would leave a superfluous trailing null byte on error
strings, while MIT builds would omit the final character.

The two bytes added to the string's length are for the prepended error
code.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>

[jsutton@samba.org Removed MIT KDC 1.20-specific knownfails]
2022-07-24 11:42:02 +02:00
Joseph Sutton
450ff39d1c CVE-2022-2031 tests/krb5: Add tests for kpasswd service
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>

[jsutton@samba.org Fixed conflicts in usage.py and knownfails; removed
 MIT KDC 1.20-specific knownfails as it's not supported]

[jsutton@samba.org Fixed conflicts in usage.py, knownfails, and
 tests.py]
2022-07-24 11:42:02 +02:00
Joseph Sutton
cf2d5d2ab3 CVE-2022-32744 selftest: Specify Administrator kvno for Python krb5 tests
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:01 +02:00
Joseph Sutton
668825ad56 CVE-2022-2031 tests/krb5: Add kpasswd_exchange() method
Now we can test the kpasswd service from Python.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>

[jsutton@samba.org Fixed conflicts in imports]
2022-07-24 11:42:01 +02:00
Joseph Sutton
5c41e20fae CVE-2022-2031 tests/krb5: Allow requesting a TGT to a different sname and realm
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>

[jsutton@samba.org Fixed conflict due to lacking rc4_support parameter]

[jsutton@samba.org Fixed conflicts due to lacking client_name_type and
 expected_cname parameters]
2022-07-24 11:42:01 +02:00
Joseph Sutton
5b030b176b tests/krb5: Add option for creating accounts with expired passwords
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:01 +02:00
Joseph Sutton
ca582250fc tests/krb5: Fix enum typo
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:01 +02:00
Joseph Sutton
13fe7e013e CVE-2022-2031 tests/krb5: Add methods to send and receive generic messages
This allows us to send and receive kpasswd messages, while avoiding the
existing logic for encoding and decoding other Kerberos message types.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:01 +02:00
Joseph Sutton
ae7dd875cd CVE-2022-2031 tests/krb5: Add 'port' parameter to connect()
This allows us to use the kpasswd port, 464.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:01 +02:00
Joseph Sutton
695c662bdc CVE-2022-2031 tests/krb5: Add methods to create ASN1 kpasswd structures
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:01 +02:00
Joseph Sutton
f7fad997cc CVE-2022-2031 tests/krb5: Add new definitions for kpasswd
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:01 +02:00
Joseph Sutton
245d9a4232 CVE-2022-32744 tests/krb5: Correctly calculate salt for pre-existing accounts
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:01 +02:00
Joseph Sutton
8917979641 CVE-2022-2031 tests/krb5: Split out _make_tgs_request()
This allows us to make use of it in other tests.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>

[jsutton@samba.org Fixed conflicts due to having older version of
 _make_tgs_request()]
2022-07-24 11:42:01 +02:00
Joseph Sutton
6305a55870 CVE-2022-32744 tests/krb5: Correctly handle specifying account kvno
The environment variable is a string, but we expect an integer.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:01 +02:00
Joseph Sutton
f6c5a60336 CVE-2022-2031 s4:kpasswd: Add MIT fallback for decoding setpw structure
The target principal and realm fields of the setpw structure are
supposed to be optional, but in MIT Kerberos they are mandatory. For
better compatibility and ease of testing, fall back to parsing the
simpler (containing only the new password) structure if the MIT function
fails to decode it.

Although the target principal and realm fields should be optional, one
is not supposed to specified without the other, so we don't have to deal
with the case where only one is specified.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:01 +02:00
Joseph Sutton
1b38a28bca CVE-2022-2031 s4:kpasswd: Account for missing target principal
This field is supposed to be optional.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15049
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15074

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
2022-07-24 11:42:01 +02:00
Joseph Sutton
6843c44a45 heimdal:kdc: Accommodate NULL data parameter in krb5_pac_get_buffer()
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
2022-07-24 11:42:01 +02:00
Joseph Sutton
c0395578c5 CVE-2022-2031 s4:kdc: Add MIT support for ATTRIBUTES_INFO and REQUESTER_SID PAC buffers
So that we do not confuse TGTs and kpasswd tickets, it is critical to
check that the REQUESTER_SID buffer exists in TGTs, and to ensure that
it is not propagated to service tickets.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15047

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>

[jsutton@samba.org Brought in changes to add ATTRIBUTES_INFO and
 REQUESTER_SID buffers to new PACs, and updated knownfails]

[jsutton@samba.org Adjusted MIT knownfails]
2022-07-24 11:42:01 +02:00
Joseph Sutton
bff1978187 selftest: Simplify krb5 test environments
It's not necessary to repeat the required environment variables for
every test.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit e729606631)

[jsutton@samba.org Fixed conflicts caused by missing check_cname,
 check_padata and fast_support variables]

[jsutton@samba.org Fixed conflicts]
2022-07-24 11:42:01 +02:00
Joseph Sutton
c0977bee5b tests/krb5: Add helper function to modify ticket flags
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit ded5115f73)
2022-07-24 11:42:01 +02:00
Joseph Sutton
787405ef59 tests/krb5: Correctly determine whether tickets are service tickets
Previously we expected tickets to contain a ticket checksum if the sname
was not the krbtgt. However, the ticket checksum should not be present
if we are performing an AS-REQ to our own account. Now we determine a
ticket is a service ticket only if the request is also a TGS-REQ.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 100be7eb8e)
2022-07-24 11:42:01 +02:00
Joseph Sutton
3fc519edec kdc: Canonicalize realm for enterprise principals
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Dec  7 04:54:35 UTC 2021 on sn-devel-184

(cherry picked from commit 8bd7b316bd)
2022-07-24 11:42:01 +02:00
Joseph Sutton
49aafce0a7 kdc: Require that PAC_REQUESTER_SID buffer is present for TGTs
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Nov 30 03:33:26 UTC 2021 on sn-devel-184

(cherry picked from commit 38c5bad4a8)
2022-07-24 11:42:01 +02:00
Joseph Sutton
65bb0e3201 heimdal:kdc: Do not generate extra PAC buffers for S4U2Self service ticket
Normally samba_wdc_get_pac() is used to generate the PAC for a TGT, but
when generating a service ticket for S4U2Self, we want to avoid adding
the additional PAC_ATTRIBUTES_INFO and PAC_REQUESTER_SID buffers.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 9bd2680485)
2022-07-24 11:42:01 +02:00
Joseph Sutton
8585333a8e selftest: Properly check extra PAC buffers with Heimdal
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit ee4aa21c48)

[jsutton@samba.org Fixed conflicts]
2022-07-24 11:42:01 +02:00
Joseph Sutton
8f97f78dd8 heimdal:kdc: Always generate a PAC for S4U2Self
If we decided not to put a PAC into the ticket, mspac would be NULL
here, and the resulting ticket would not contain a PAC. This could
happen if there was a request to omit the PAC or the service did not
require authorization data. Ensure that we always generate a PAC.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 1f4f3018c5)
2022-07-24 11:42:01 +02:00
Joseph Sutton
d343630074 tests/krb5: Add a test for S4U2Self with no authorization data required
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 192d6edfe9)
2022-07-24 11:42:01 +02:00
Joseph Sutton
29f15fe2d9 kdc: Remove PAC_TYPE_ATTRIBUTES_INFO from RODC-issued tickets
Windows ignores PAC_TYPE_ATTRIBUTES_INFO and always issues a PAC when
presented with an RODC-issued TGT. By removing this PAC buffer from
RODC-issued tickets, we ensure that an RODC-issued ticket will still
result in a PAC if it is first renewed or validated by the main DC.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 4b60e95164)
2022-07-24 11:42:01 +02:00
Joseph Sutton
72afa2641c kdc: Don't include extra PAC buffers in service tickets
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 90025b6a4d)
2022-07-24 11:42:01 +02:00
Joseph Sutton
925f63f3e4 Revert "CVE-2020-25719 s4/torture: Expect additional PAC buffers"
This reverts commit fa4c9bcefd.

We should not be generating these additional PAC buffers for service
tickets, only for TGTs.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit e61983c7f2)
2022-07-24 11:42:01 +02:00
Joseph Sutton
4cd44326ce 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>
(cherry picked from commit 73a4806346)
2022-07-24 11:42:01 +02:00
Joseph Sutton
93a5264dd6 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>
(cherry picked from commit 690a00a40c)
2022-07-24 11:42:01 +02:00
Joseph Sutton
46b05cbf80 kdc: Match Windows error code for mismatching sname
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit b6a25f5f01)
2022-07-24 11:42:01 +02:00
Joseph Sutton
c62a2b7a21 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>
(cherry picked from commit bac5f75059)
2022-07-24 11:42:01 +02:00
Joseph Sutton
5556f97c78 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>
(cherry picked from commit d5d22bf84a)
2022-07-24 11:42:01 +02:00
Joseph Sutton
02ceb9be33 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>
(cherry picked from commit f7a2fef8f4)
2022-07-24 11:42:01 +02:00
Joseph Sutton
33d5e5ad3a s4:torture: Fix typo
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 9cfb88ba04)
2022-07-24 11:42:01 +02:00
Joseph Sutton
6dbed53756 heimdal:kdc: Fix error message for user-to-user
We were checking the wrong variable to see whether a PAC was found or not.

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 11fb9476ad)
2022-07-24 11:42:01 +02:00
Joseph Sutton
69233dd323 tests/krb5: Add comments for tests that fail against Windows
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 749349efab)
2022-07-24 11:42:01 +02:00
Joseph Sutton
3fdfbd08b9 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>
(cherry picked from commit ca80c47406)
2022-07-24 11:42:01 +02:00
Joseph Sutton
5375e2b99c 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>
(cherry picked from commit ebc9137cee)

[jsutton@samba.org Fixed conflicts]
2022-07-24 11:42:01 +02:00
Joseph Sutton
1d616e8e9c tests/krb5: Add TGS-REQ tests with FAST
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit ec823c2a83)
2022-07-24 11:42:01 +02:00
Joseph Sutton
645d30ff37 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>
(cherry picked from commit 778029c1dc)
2022-07-24 11:42:01 +02:00
Joseph Sutton
eb0ed5f4f6 tests/krb5: Add tests for invalid TGTs
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 7574ba9f58)

[jsutton@samba.org Removed some MIT knownfail changes]
2022-07-24 11:42:01 +02:00