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For Heimdal, this now matches the behaviour of Windows. The object of
this requirement is to ensure we don't allow kpasswd tickets, not having
a lifetime of more than two minutes, to be passed off as TGTs.
An existing requirement for TGTs to contain a REQUESTER_SID PAC buffer
suffices to prevent kpasswd ticket misuse, so this is just an additional
precaution on top.
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 As we don't have access to the ticket or the request
in the plugin, rewrote check directly in Heimdal KDC]
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)
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)
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)
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
(cherry picked from commit 90febd2a33)
[jsutton@samba.org Removed MIT knownfail changes]
On an RODC we need to redirect failing preauthentication to an RWDC.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14865
Signed-off-by: Stefan Metzmacher <metze@samba.org>
(similar to commit heimdal commit df655cecd12712e7f7df5128b123eee0066a8216)
This reverts an earlier commit that was incorrect.
It is not Samba practice to include a revert, but at this point in
the patch preperation the ripple though the knownfail files is
more trouble than can be justified.
It is not correct to refuse to parse all tickets with no authorization
data, only for the KDC to require that a PAC is found, which is done
in "heimdal:kdc: Require PAC to be present"
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
This allows us to use it when validating 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>
Looking up the DB twice is subject to a race and is a poor
use of resources, so instead just pass in the record we
already got when trying to confirm that the server in
S4U2Self is the same as the requesting client.
The client record has already been bound to the the
original client by the SID check in the PAC.
Likewise by looking up server only once we ensure
that the keys looked up originally are in the record
we confirm the SID for here.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14686
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Commit f469fc6 (2010-10-02) inadvertently caused the previous hop realm
to not be added to the transit path of issued tickets. This may, in
some cases, enable bypass of capath policy in Heimdal versions 1.5
through 7.2.
Note, this may break sites that rely on the bug. With the bug some
incomplete [capaths] worked, that should not have. These may now break
authentication in some cross-realm configurations.
(similar to heimdal commit b1e699103f08d6a0ca46a122193c9da65f6cf837)
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12998
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14881
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Wed Oct 20 10:58:37 UTC 2021 on sn-devel-184
(cherry picked from commit 7e961f3f7a)
When generating an AS-REQ, the TGS signature was incorrectly generated using
the server key, which would fail to validate if the server was not also the
TGS. Fix this.
Patch from Isaac Bourkis <iboukris@gmail.com>.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14642
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14881
[jsutton@samba.org Backported from Heimdal commit
e7863e2af922809dad25a2e948e98c408944d551
- Samba's Heimdal version does not have the generate_pac() helper
function.
- Samba's Heimdal version does not use the 'r' context variable.
]
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 91e684f5dc)
The principal in the PAC_LOGON_NAME buffer is expected to match the client name
in the ticket. Previously we were setting this to the canonical client name,
which would have broken PAC validation if the client did not request name
canonicalization
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14642
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14881
[jsutton@samba.org Backported from Heimdal commit
3b0856cab2b25624deb1f6e0e67637ba96a647ac
- Renamed variable to avoid shadowing existing variable
]
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 75d1a7cd14)
Split Windows PAC signing and verification logic, as the signing has to be when
the ticket is ready.
Create sign and verify the PAC KDC signature if the plugin did not, allowing
for S4U2Proxy to work, instead of KRB5SignedPath.
Use the header key to verify PAC server signature, as the same key used to
encrypt/decrypt the ticket should be used for PAC server signature, like U2U
tickets are signed witht the tgt session-key and not with the longterm key,
and so krbtgt should be no different and the header key should be used.
Lookup the delegated client in DB instead of passing the delegator DB entry.
Add PAC ticket-signatures and related functions.
Note: due to the change from KRB5SignedPath to PAC, S4U2Proxy requests
against new KDC will not work if the evidence ticket was acquired from
an old KDC, and vide versa.
Closes: #767
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14642
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14881
[jsutton@samba.org Backported from Heimdal commit
2ffaba9401d19c718764d4bd24180960290238e9
- Removed tests
- Adapted to Samba's version of Heimdal
- Addressed build failures with -O3
- Added knownfails
]
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
[abartlet@samba.org backported from commit d7b03394a9
due to conflicts in knownfail due to missing tests that crash the
MIT KDC]
KRB5SignedPath was a Heimdal-specific authorization data element used to
protect the authenticity of evidence tickets when used in constrained
delegation (without a Windows PAC).
Remove this, to be replaced with the Windows PAC which itself now supports
signing the entire ticket in the TGS key.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14642
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14881
[jsutton@samba.org Backported from Heimdal commit
bb1d8f2a8c2545bccdf2c9179ce9259bf1050086
- Removed tests
- Removed auditing hook (only present in Heimdal master)
- Added knownfails
]
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit ccabc7f16c)
If missing cname or sname in AS-REQ, return KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN and
KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN. This matches MIT behaviour.
[abartlet@samba.org Backported from Heimdal commit 892a1ffcaad98157e945c540b81f65edb14d29bd
and knownfail added. Further adapted knownfail for 4.14 due to conflicts
as the patch that adds a test which crashes old MIT versions is
omitted]
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14770
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14817
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
In tgs_build_reply(), validate the server name in the TGS-REQ is present before
dereferencing.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14770
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14817
[abartlet@samba.org backported from from Heimdal
commit 04171147948d0a3636bc6374181926f0fb2ec83a via reference
to an earlier patch by Joseph Sutton]
RN: An unuthenticated user can crash the AD DC KDC by omitting the server name in a TGS-REQ
Reviewed-by: Andreas Schneider <asn@samba.org>
(cherry picked from commit 0cb4b939f1)
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12505
Signed-off-by: Paul Wise <pabs3@bonedaddy.net>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Original-author: Nicolas Williams <nico@twosigma.com>
(cherry-picked from heimdal commit b3db07d5f0e03f6a1a0a392e70f9675e19a6d6af)
(cherry picked from commit f9ed4f7028)
Other parts of Samba already compile these directly.
This makes these files compile with modern compiler warnings.
The primary difference (other than being built with a newer
flex) is the loss of the #include "config.h" but
this is not used in the other .l files elsewehre and does not
seem to matter on modern systems.
The generated output from compile_et asn1_compile has not changed
(so I think the hx509 case is safe).
The mdssvc case just has changed file locations and line numbers.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
This allows us to avoid warnings and errors due to unsued variables
and functions.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
even if the tgt session key uses different hmac.
Per [MS-SFU] 2.2.1 PA-FOR-USER the checksum is
always HMAC_MD5, and that's what windows 7 client
and MIT client send.
In heimdal both the client and kdc use the checksum of
the tgt key instead and therefore work with each other
but windows and MIT clients fail against heimdal KDC.
Windows KDC allows either checksum (HMAC_MD5 or from
tgt) so we should do the same to support all clients.
Signed-off-by: Isaac Boukris <iboukris@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Thu Jun 11 02:48:58 UTC 2020 on sn-devel-184
If Samba was configured with "--nonshared-binary=winexe" to build
winexe as a static binary, and the replacement closefrom() function
was used (which is default on most GNU/Linux systems without the libbsd
development package installed), then winexe would fail to link with the
error message shown below.
[2631/3059] Linking bin/default/examples/winexe/winexe
source4/heimdal/lib/roken/closefrom.c.1.o: In function `rep_closefrom':
closefrom.c:(.text+0x0): multiple definition of `rep_closefrom'
lib/replace/closefrom.c.2.o:closefrom.c:(.text+0x292): first defined here
collect2: error: ld returned 1 exit status
The real problem here was not with the winexe build itself - that was
merely the application that I was attempting to build statically when I
encountered it. As Andrew Bartlett very helpfully pointed out to me, this
regression was introduced when "lib/replace/closefrom.c" was added in
commit 55529d0f and, more to the point, when the heimdal build started
using it in commit 3a7ebd0e. From that point on, any time that Samba's
embedded copy of heimdal was statically linked into an application, it
would fail to link because heimdal's own rep_closefrom() function in its
"roken" library would conflict with the rep_closefrom() function in the
"replace" library used elsewhere in Samba - a library which the "roken"
library itself depends on. To further compound the problem, heimdal's
own "roken" library is also compiled for the host (a necessary
distinction for cross-compiled builds) and linked into a small number of
utility applications used during the heimdal build. However, they can't
link directly against the "replace" library, unlike the main "roken"
library build which carries that dependency, because the "replace"
library is _not_ built for the host.
I solved this problem by eliminating heimdal's version of rep_closefrom()
and making it use the one from "lib/replace" everywhere. That wasn't a
problem for the main heimdal library that is built for the target because
it was already linking in "lib/replace" (that's what caused this problem
in the first place!), but to solve the aforementioned issue with
"lib/replace" not being built for the host, I added
"lib/replace/closefrom.c" to the list of "source4/heimdal/lib/roken"
sources to be built for the host to satisfy heimdal's host utilities.
Everyone wins, I think.
Signed-off-by: Karl Lenz <xorangekiller@gmail.com>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13685
Signed-off-by: Isaac Boukris <iboukris@gmail.com>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Karolin Seeger <kseeger@samba.org>
Autobuild-Date(master): Tue May 14 11:45:13 UTC 2019 on sn-devel-184
