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Handle the case where a NT4 DC does not fill in the acct_flags in
the samlogon reply info3. Yes, in 2021, there are still admins
arround with real NT4 DCs.
NT4 DCs reject authentication with workstation accounts with
NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT, even if
MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT is specified.
We no longer call dcerpc_samr_QueryUserInfo(level=16)
to get the acct_flags, as we only ever got
ACB_NORMAL back (maybe with ACB_PWNOEXP in addition),
which is easy to calculate on our own.
This was removed in commit (for 4.15.0rc1):
commit 73528f26ee
Author: Ralph Boehme <slow@samba.org>
AuthorDate: Mon Jan 11 14:59:46 2021 +0100
Commit: Jeremy Allison <jra@samba.org>
CommitDate: Thu Jan 21 22:56:20 2021 +0000
winbind: remove legacy flags fallback
Some very old NT4 DCs might have not returned the account flags filled in. This
shouldn't be a problem anymore. Additionally, on a typical domain member server,
this request is (and can only be) send to the primary domain, so this will not
work with accounts from trusted domains.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Jan 21 22:56:20 UTC 2021 on sn-devel-184
It means one more caller of the problematic cm_connect_sam()
function is removed! SAMR connections may not be allowed for
machine accounts with modern AD DCs.
For network logons NT4 DCs also skip the
account_name, so we have to fallback to the
one given by the client. We have code to cope
with that deeply hidden inside of netsamlogon_cache_store().
Up to Samba 4.7 netsamlogon_cache_store() operated on the
info3 structure that was passed to the caller of winbind_dual_SamLogon()
and pass propagated up to auth_winbind in smbd.
But for Samba 4.8 the following commit:
commit f153c95176
Author: Ralph Boehme <slow@samba.org>
Date: Mon Dec 11 16:25:35 2017 +0100
winbindd: let winbind_dual_SamLogon return validation
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
actually changed the situation and only a temporary info3 structure
was passed into netsamlogon_cache_store(), which means
account_name was NULL and get propagated as "" into auth_winbind
in smbd, where getpwnam() is no longer possible and every
smb access gets NT_STATUS_LOGON_FAILURE.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14772
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Tue Aug 3 11:10:27 UTC 2021 on sn-devel-184
93bac5f122