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This implements the note from MS-NRPC 3.1.4.1 Session-Key Negotiation:
7. If none of the first 5 bytes of the client challenge is unique, the
server MUST fail session-key negotiation without further processing of
the following steps.
It lets ./zerologon_tester.py from
https://github.com/SecuraBV/CVE-2020-1472.git
report: "Attack failed. Target is probably patched."
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14497
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
This is the check Windows is using, so we won't generate challenges,
which are rejected by Windows DCs (and future Samba DCs).
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14497
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
This will avoid getting rejected by the server if we generate
a weak challenge.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14497
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
It's good to have just a single isolated function that will generate
random challenges, in future we can add some logic in order to
avoid weak values, which are likely to be rejected by a server.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14497
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
lib/util/safe_string.h is similar to source3/include/safe_string.h, but
the former has fewer checks. It is missing bcopy, strcasecmp, and
strncasecmp.
Add the missing elements to lib/util/safe_string.h remove the other
safe_string.h which is in the source3-specific path. To accomodate
existing uses of str(n?)casecmp, add #undef lines to source files where
they are used.
Signed-off-by: Matthew DeVore <matvore@google.com>
Reviewed-by: David Mulder <dmulder@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Fri Aug 28 02:18:40 UTC 2020 on sn-devel-184
Add encryption enum and function to avoid confusion when reading the
code.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
If we execute this code from python we don't have a talloc stackframe
around and segfault with talloc_tos().
To fix the crash we use the NULL context as we take care for freeing the
memory as soon as possible.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Swen Schillig <swen@linux.ibm.com>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Aug 3 22:21:04 UTC 2020 on sn-devel-184
ldap-starttls-response.dat is a reply to a starttls extended
operation. Right now ldap_decode() does not handle this correctly.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This will be used by smbtorture in order to simulate channel failures
without relying on iptables.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11897
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
An empty UDP packet put the nbt server into a busy loop that consumes
100% of a cpu.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14417
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Autobuild-User(master): Karolin Seeger <kseeger@samba.org>
Autobuild-Date(master): Thu Jul 2 10:26:24 UTC 2020 on sn-devel-184
libcli/ldap/tests/ldap_message_test.c defines a zero length array
(uint8_t buf[0]), which is a GCC extension and breaks the build with
some strict compilers like xlc.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14387
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Tue Jun 23 02:15:35 UTC 2020 on sn-devel-184
The auto-generated define NT_STATUS_EA_LIST_INCONSISTENT is still
available.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Mon Jun 22 13:30:51 UTC 2020 on sn-devel-184
The auto-generated define NT_STATUS_STOPPED_ON_SYMLINK is still
available.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
The auto-generated define NT_STATUS_PENDING is still available.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
The auto-generated define NT_STATUS_NOTIFY_ENUM_DIR is still available.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
The auto-generated NT_STATUS_NOTIFY_CLEANUP is still available.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
The auto-generated define NT_STATUS_INVALID_EA_FLAG is still available.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
The auto-generated define NT_STATUS_NO_MORE_EAS is still available.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
The auto-generated define WERR_INVALID_DATATYPE is still available.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
as dodumented in
https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-smb2/a64e55aa-1152-48e4-8206-edd96444e7f7
FSCTL_SET_OBJECT_ID_EXTENDED
FSCTL_READ_FILE_USN_DATA
FSCTL_WRITE_USN_CLOSE_RECORD
FSCTL_QUERY_ON_DISK_VOLUME_INFO
FSCTL_QUERY_SPARING_INFO
FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX
FSCTL_STORAGE_QOS_CONTROL
Signed-off-by: Bjoern Jacke <bjacke@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Björn Jacke <bjacke@samba.org>
Autobuild-Date(master): Tue May 19 15:57:08 UTC 2020 on sn-devel-184
Check the search request lengths against the limits passed to
ldap_decode.
Credit to OSS-Fuzz
REF: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20454
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14334
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Gary Lockyer <gary@samba.org>
Autobuild-Date(master): Mon May 4 04:40:10 UTC 2020 on sn-devel-184
Add search request size limits to ldap_decode calls.
The ldap server uses the smb.conf variable
"ldap max search request size" which defaults to 250Kb.
For cldap the limit is hard coded as 4096.
Credit to OSS-Fuzz
REF: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20454
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14334
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Add tests to check that ASN.1 ldap requests with deeply nested elements
are rejected. Previously there was no check on the on the depth of
nesting and excessive nesting could cause a stack overflow.
Credit to OSS-Fuzz
REF: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20454
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14334
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
All traffic goes through smbXcli_base.c, and that is prepared to deal
with short writes via the conn->outgoing queue. Instead of making sure
that all callers properly set the socket nonblocking, do it here, so
that we can later optimize sending out data to the server.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This allows us to end the use of Python 2/3 compatability macros.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Noel Power <npower@samba.org>
This will allow us to remove some unused code in the PIDL-generated
python bindings.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Noel Power <npower@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Mar 10 23:08:20 UTC 2020 on sn-devel-184
Will be used internally to pass an artificial posix create context
into VFS_CREATE_FILE from the SMB1 unix extension calls
Pair programmed with: Jeremy Allison <jra@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Will simplify callers a bit, and it does not change semantics
significantly. Zero create blobs won't find anything anyway.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
