Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: fix the order of error checking in dcesrv_alter()
The basically matches Windows 2012R2, it's not 100%
but it's enough for our raw protocol tests to pass.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: changing an existing presentation context via alter_context is a protocol error
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: don't derefence an empty ctx_list array in dcesrv_alter()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: remove pointless dcesrv_find_context() from dcesrv_bind()
BIND is the first pdu, which means the list of contexts is always empty.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: let invalid request fragments disconnect the connection with a protocol error
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: make sure alter_context and auth3 can't change auth_{type,level,context_id}
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: maintain in and out struct dcerpc_auth per dcesrv_call_state
We should not use one "global" per connection variable to hold the
incoming and outgoing auth_info.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: ensure that the message ordering doesn't violate the spec
The first pdu is always a BIND.
REQUEST pdus are only allowed once the authentication
is finished.
A simple anonymous authentication is finished after the BIND.
Real authentication may need additional ALTER or AUTH3 exchanges.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: verify the protocol headers before processing pdus
On protocol errors we should send BIND_NAK or FAULT and mark the
connection as to be terminated.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: add infrastructure to terminate a connection after a response
BIND_NAK or FAULT may mark a connection as to be terminated.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: make dcesrv_process_ncacn_packet() static
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: return the correct secondary_address in dcesrv_bind()
For now we still force \\PIPE\\ in upper case, we may be able to remove
this and change it in our idl files later. But for now we better
behave like a windows server without changing too much.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: add some padding to dcesrv_bind_nak() responses
This matches Windows 2012R2.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: split out a dcesrv_fault_with_flags() helper function
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: fill context_id in dcesrv_fault()
This depends on the type of the incoming pdu.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: set alloc_hint = 24 in dcesrv_fault()
This matches a Windows 2012R2 server.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: avoid ZERO_STRUCT() in dcesrv_fault()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: correctly maintain dcesrv_connection->max_{recv,xmit}_frag
These values are controlled by the client but only in a range between
2048 and 5840 (including these values in 8 byte steps).
recv and xmit result always in same min value.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server/netlogon: make use of dce_call->conn->auth_state.auth_{level,type}
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server/samr: make use of dce_call->conn->auth_state.auth_level
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server/lsa: make use of dce_call->conn->auth_state.auth_{level,type}
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Thu, 10 Mar 2016 15:02:31 +0000 (16:02 +0100)]
CVE-2015-5370: s4:rpc_server: make use of dce_call->conn->auth_state.auth_* in dcesrv_request()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Mon, 29 Jun 2015 09:03:58 +0000 (11:03 +0200)]
CVE-2015-5370: s4:rpc_server: maintain dcesrv_auth->auth_{type,level,context_id}
This will simplify checks in the following commits and avoids
derefencing dcesrv_auth->auth_info which is not always arround.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: check the result of dcerpc_pull_auth_trailer() in dcesrv_auth_bind()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: no authentication is indicated by pkt->auth_length == 0
pkt->u.*.auth_info.length is not the correct thing to check.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: s4:rpc_server: make use of talloc_zero()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 10 Jul 2015 12:08:46 +0000 (14:08 +0200)]
CVE-2015-5370: s4:librpc/rpc: protect dcerpc_request_recv_data() against too large payloads
We should only allow a combined payload of a response of at max 4 MBytes.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: use dcerpc_verify_ncacn_packet_header() to verify BIND_ACK,ALTER_RESP,RESPONSE pdus
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: handle DCERPC_PKT_FAULT before anything else in dcerpc_alter_context_recv_handler()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: make use of dcerpc_map_ack_reason() in dcerpc_bind_recv_handler()
This should give better error messages if the server doesn't support
a specific abstract/transfer syntax.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Tue, 7 Jul 2015 11:05:01 +0000 (13:05 +0200)]
CVE-2015-5370: s3:rpc_client: remove useless frag_length check in rpc_api_pipe_got_pdu()
dcerpc_pull_ncacn_packet() already verifies this.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Tue, 7 Jul 2015 11:05:01 +0000 (13:05 +0200)]
CVE-2015-5370: s3:rpc_client: move AS/U hack to the top of cli_pipe_validate_current_pdu()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 26 Jun 2015 06:10:46 +0000 (08:10 +0200)]
CVE-2015-5370: librpc/rpc: add a dcerpc_verify_ncacn_packet_header() helper function
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: finally verify the server uses the expected auth_{type,level,context_id} values
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: avoid using dcecli_security->auth_info and use per request values
We now avoid reusing the same auth_info structure for incoming and outgoing
values. We need to make sure that the remote server doesn't overwrite our own
values.
This will trigger some failures with our currently broken server,
which will be fixed in the next commits.
The broken server requires an dcerpc_auth structure with no credentials
in order to do an alter_context request that just creates a presentation
context without doing authentication.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: simplify checks if gensec is used in dcerpc_ship_next_request()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: avoid dereferencing sec->auth_info in dcerpc_request_prepare_vt()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: always use ncacn_pull_request_auth() for DCERPC_PKT_RESPONSE pdus
It handles the case of DCERPC_AUTH_TYPE_NONE just fine and it makes it
possible to do some verification in future.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: avoid using c->security_state.auth_info in ncacn_pull_request_auth()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: avoid using hs->p->conn->security_state.auth_info in dcerpc_bh_auth_info()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: use a local auth_info variable in ncacn_push_request_sign()
We should avoid using the global dcecli_security->auth_info struct for
individual requests.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: use auth_context_id = 1
In future we want to verify that the auth_context_id from the server
is what we expect.
As Samba (<= 4.2.3) use a hardcoded value of 1 in responses, we
need to use that.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 08:31:48 +0000 (10:31 +0200)]
CVE-2015-5370: s4:librpc/rpc: maintain dcecli_security->auth_{type,level,context_id}
This will simplify the following commits and avoids dereferencing
dcecli_security->auth_info.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Wed, 8 Jul 2015 14:25:48 +0000 (16:25 +0200)]
CVE-2015-5370: s4:librpc/rpc: send a dcerpc_sec_verification_trailer if needed
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Mon, 29 Jun 2015 08:24:45 +0000 (10:24 +0200)]
CVE-2015-5370: s3:librpc/rpc: don't call dcerpc_pull_auth_trailer() if auth_length is 0
All other paranoia checks are done within dcerpc_pull_auth_trailer()
now.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 27 Jun 2015 23:19:57 +0000 (01:19 +0200)]
CVE-2015-5370: librpc/rpc: simplify and harden dcerpc_pull_auth_trailer()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Thu, 16 Jul 2015 20:46:05 +0000 (22:46 +0200)]
CVE-2015-5370: dcerpc.idl: add DCERPC_{NCACN_PAYLOAD,FRAG}_MAX_SIZE defines
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11344
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sun, 28 Feb 2016 21:48:11 +0000 (22:48 +0100)]
CVE-2016-2118: s3:rpc_server/samr: allow _samr_ValidatePassword only with PRIVACY...
This requires transport encryption.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sun, 28 Feb 2016 21:48:11 +0000 (22:48 +0100)]
CVE-2016-2118: s4:rpc_server/samr: allow _samr_ValidatePassword only with PRIVACY...
This requires transport encryption.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Thu, 10 Mar 2016 16:03:59 +0000 (17:03 +0100)]
CVE-2016-2118: docs-xml: default "allow dcerpc auth level connect" to "no"
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Stefan Metzmacher [Sat, 26 Mar 2016 07:47:42 +0000 (08:47 +0100)]
CVE-2016-2118: s3:rpc_server/{epmapper,echo}: allow DCERPC_AUTH_LEVEL_CONNECT by default
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Stefan Metzmacher [Fri, 7 Aug 2015 07:50:30 +0000 (09:50 +0200)]
CVE-2016-2118: s3:rpc_server/{samr,lsa,netlogon}: reject DCERPC_AUTH_LEVEL_CONNECT by default
This prevents man in the middle downgrade attacks.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Pair-Programmed-With: Günther Deschner <gd@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 18 Mar 2016 03:40:30 +0000 (04:40 +0100)]
CVE-2016-2118: s3:rpc_server: make use of "allow dcerpc auth level connect"
With this option turned off we only allow DCERPC_AUTH_LEVEL_{NONE,INTEGRITY,PRIVACY},
this means the reject any request with AUTH_LEVEL_CONNECT with ACCESS_DENIED.
We sadly need to keep this enabled by default for now.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Pair-Programmed-With: Günther Deschner <gd@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Sat, 26 Mar 2016 18:19:04 +0000 (19:19 +0100)]
CVE-2016-2118: s4:rpc_server/rpcecho: allow DCERPC_AUTH_LEVEL_CONNECT by default
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Stefan Metzmacher [Sat, 26 Mar 2016 18:18:42 +0000 (19:18 +0100)]
CVE-2016-2118: s4:rpc_server/mgmt: allow DCERPC_AUTH_LEVEL_CONNECT by default
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Stefan Metzmacher [Sat, 26 Mar 2016 18:17:40 +0000 (19:17 +0100)]
CVE-2016-2118: s4:rpc_server/epmapper: allow DCERPC_AUTH_LEVEL_CONNECT by default
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Stefan Metzmacher [Fri, 7 Aug 2015 11:52:48 +0000 (13:52 +0200)]
CVE-2016-2118: s4:rpc_server/netlogon: reject DCERPC_AUTH_LEVEL_CONNECT by default
This prevents man in the middle downgrade attacks.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Stefan Metzmacher [Fri, 7 Aug 2015 07:50:30 +0000 (09:50 +0200)]
CVE-2016-2118: s4:rpc_server/samr: reject DCERPC_AUTH_LEVEL_CONNECT by default
This prevents man in the middle downgrade attacks.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 7 Aug 2015 07:50:30 +0000 (09:50 +0200)]
CVE-2016-2118: s4:rpc_server/lsa: reject DCERPC_AUTH_LEVEL_CONNECT by default
This prevents man in the middle downgrade attacks.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Thu, 10 Mar 2016 01:46:59 +0000 (02:46 +0100)]
CVE-2016-2118: s4:rpc_server: make use of "allow dcerpc auth level connect"
With this option turned off we only allow DCERPC_AUTH_LEVEL_{NONE,INTEGRITY,PRIVACY},
this means the reject any request with AUTH_LEVEL_CONNECT with ACCESS_DENIED.
We sadly need to keep this enabled by default for now.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Thu, 10 Mar 2016 16:03:59 +0000 (17:03 +0100)]
CVE-2016-2118: docs-xml: add "allow dcerpc auth level connect" defaulting to "yes"
We sadly need to allow this for now by default.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Fri, 11 Mar 2016 15:02:25 +0000 (16:02 +0100)]
CVE-2016-2118: s4:librpc: use integrity by default for authenticated binds
ncacn_ip_tcp:server should get the same protection as ncacn_np:server
if authentication and smb signing is used.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Stefan Metzmacher [Tue, 15 Dec 2015 13:49:36 +0000 (14:49 +0100)]
CVE-2016-2118: librpc: change the default auth level from DCERPC_AUTH_LEVEL_CONNECT to DCERPC_AUTH_LEVEL_INTEGRITY
ncacn_ip_tcp:server should get the same protection as ncacn_np:server
if authentication and smb signing is used.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Stefan Metzmacher [Tue, 15 Dec 2015 13:49:36 +0000 (14:49 +0100)]
CVE-2016-2118: s3: rpcclient: change the default auth level from DCERPC_AUTH_LEVEL_CONNECT to DCERPC_AUTH_LEVEL_INTEGRITY
ncacn_ip_tcp:server should get the same protection as ncacn_np:server
if authentication and smb signing is used.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Stefan Metzmacher [Thu, 10 Mar 2016 03:06:04 +0000 (04:06 +0100)]
CVE-2016-2118: s4:rpc_server/dnsserver: require at least DCERPC_AUTH_LEVEL_INTEGRITY
This matches windows and prevents man in the middle downgrade attacks.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Mon, 14 Mar 2016 21:15:00 +0000 (22:15 +0100)]
CVE-2016-2118: python:tests/dcerpc: use [sign] for dnsserver tests
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Tue, 14 Jul 2015 07:13:00 +0000 (09:13 +0200)]
CVE-2016-2118: s4:rpc_server/backupkey: require DCERPC_AUTH_LEVEL_PRIVACY
This is required for the whole interface (which has just one opnum for now).
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Tue, 14 Jul 2015 07:13:00 +0000 (09:13 +0200)]
CVE-2016-2118: s4:rpc_server/drsuapi: require DCERPC_AUTH_LEVEL_PRIVACY
This matches windows and prevents man in the middle downgrade attacks.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Tue, 14 Jul 2015 07:12:18 +0000 (09:12 +0200)]
CVE-2016-2118: s4:rpc_server: make it possible to define a min_auth_level on a presentation context
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Tue, 15 Mar 2016 22:52:30 +0000 (23:52 +0100)]
CVE-2016-2115: docs-xml: always default "client ipc signing" to "mandatory"
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Ralph Boehme [Wed, 16 Dec 2015 09:04:35 +0000 (10:04 +0100)]
CVE-2016-2115: s3:libsmb: use SMB_SIGNING_IPC_DEFAULT and lp_client_ipc_{min,max}_protocol()
Use SMB_SIGNING_IPC_DEFAULT and lp_client_ipc_{min,max}_protocol() for RPC connections.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Ralph Boehme [Wed, 16 Dec 2015 09:03:52 +0000 (10:03 +0100)]
CVE-2016-2115: s3:libnet: use SMB_SIGNING_IPC_DEFAULT
Use SMB_SIGNING_IPC_DEFAULT for RPC connections.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Ralph Boehme [Wed, 16 Dec 2015 09:03:13 +0000 (10:03 +0100)]
CVE-2016-2115: s3:auth_domain: use SMB_SIGNING_IPC_DEFAULT
Use SMB_SIGNING_IPC_DEFAULT for RPC connections.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Ralph Boehme [Wed, 16 Dec 2015 09:01:59 +0000 (10:01 +0100)]
CVE-2016-2115: s3:lib/netapi: use SMB_SIGNING_IPC_DEFAULT
Use SMB_SIGNING_IPC_DEFAULT for RPC connections.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Ralph Boehme [Wed, 16 Dec 2015 09:00:09 +0000 (10:00 +0100)]
CVE-2016-2115: net: use SMB_SIGNING_IPC_DEFAULT
Use SMB_SIGNING_IPC_DEFAULT for RPC connections.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Stefan Metzmacher [Fri, 18 Dec 2015 16:16:04 +0000 (17:16 +0100)]
CVE-2016-2115: s3:libsmb: let SMB_SIGNING_IPC_DEFAULT use "client ipc min/max protocol"
We need NT1 => LATEST in order to work against all servers which support
DCERPC over ncacn_np.
This is a mini step in using SMB2/3 in our client side by default.
This gives us a higher chance that SMB signing is supported by the
server (as it can't be turned off for SMB2 and higher).
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Ralph Boehme [Wed, 16 Dec 2015 08:55:37 +0000 (09:55 +0100)]
CVE-2016-2115: s3:libsmb: add signing constant SMB_SIGNING_IPC_DEFAULT
SMB_SIGNING_IPC_DEFAULT must be used from s3 client code when opening
RPC connections.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Stefan Metzmacher [Mon, 21 Dec 2015 12:22:16 +0000 (13:22 +0100)]
CVE-2016-2115: s3:winbindd: use lp_client_ipc_signing()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Stefan Metzmacher [Sat, 27 Feb 2016 03:23:58 +0000 (04:23 +0100)]
CVE-2016-2115: s3:winbindd: use lp_client_ipc_{min,max}_protocol()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Stefan Metzmacher [Fri, 28 Mar 2014 12:44:29 +0000 (13:44 +0100)]
CVE-2016-2115: s4:librpc/rpc: make use of "client ipc *" options for ncacn_np
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Stefan Metzmacher [Sat, 27 Feb 2016 03:15:38 +0000 (04:15 +0100)]
CVE-2016-2115: s4:libcli/raw: pass the minprotocol to smb_raw_negotiate*()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Stefan Metzmacher [Sat, 27 Feb 2016 03:15:38 +0000 (04:15 +0100)]
CVE-2016-2115: s4:libcli/raw: limit maxprotocol to NT1 in smb_raw_negotiate*()
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Stefan Metzmacher [Sat, 27 Feb 2016 03:14:39 +0000 (04:14 +0100)]
CVE-2016-2115: s4:libcli/smb2: use the configured min_protocol
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Stefan Metzmacher [Sat, 27 Feb 2016 03:13:11 +0000 (04:13 +0100)]
CVE-2016-2115: s4:libcli/raw: add smbcli_options.min_protocol
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Stefan Metzmacher [Sat, 27 Feb 2016 02:43:58 +0000 (03:43 +0100)]
CVE-2016-2115: docs-xml: add "client ipc signing" option
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11756
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Stefan Metzmacher [Sat, 27 Feb 2016 02:45:43 +0000 (03:45 +0100)]
CVE-2016-2115: docs-xml: add "client ipc min protocol" and "client ipc max protocol" options
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11796
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Stefan Metzmacher [Wed, 15 Jul 2015 08:57:03 +0000 (10:57 +0200)]
CVE-2016-2114: docs-xml: let the "smb signing" documentation reflect the reality
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11687
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Ralph Boehme [Tue, 22 Mar 2016 15:30:42 +0000 (16:30 +0100)]
CVE-2016-2114: s3:smbd: enforce "server signing = mandatory"
This fixes a regression that was introduced by commit
abb24bf8e874d525382e994af7ae432212775153
("s3:smbd: make use of better SMB signing negotiation").
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11687
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Ralph Boehme [Tue, 22 Mar 2016 15:25:32 +0000 (16:25 +0100)]
CVE-2016-2114: libcli/smb: let mandatory signing imply allowed signing
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11687
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Wed, 15 Jul 2015 08:57:03 +0000 (10:57 +0200)]
CVE-2016-2114: s3:smbd: use the correct default values for "smb signing"
This means an ad_dc will now require signing by default.
This matches the default behavior of Windows dc and avoids
man in the middle attacks.
The main logic for this hides in lpcfg_server_signing_allowed().
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11687
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Thu, 16 Jul 2015 02:45:16 +0000 (04:45 +0200)]
CVE-2016-2114: s4:smb2_server: fix session setup with required signing
The client can't sign the session setup request...
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11687
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Wed, 16 Mar 2016 12:03:08 +0000 (13:03 +0100)]
CVE-2016-2113: docs-xml: let "tls verify peer" default to "as_strict_as_possible"
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11752
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Stefan Metzmacher [Sat, 26 Mar 2016 07:38:46 +0000 (08:38 +0100)]
CVE-2016-2113: selftest: use "tls verify peer = no_check"
Individual tests will check the more secure values.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11752
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Stefan Metzmacher [Wed, 16 Mar 2016 14:07:36 +0000 (15:07 +0100)]
CVE-2016-2113: selftest: test all "tls verify peer" combinations with ldaps
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11752
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Wed, 23 Dec 2015 15:17:04 +0000 (16:17 +0100)]
CVE-2016-2113: s4:librpc/rpc: verify the rpc_proxy certificate and hostname if configured
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11752
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Wed, 23 Dec 2015 15:17:04 +0000 (16:17 +0100)]
CVE-2016-2113: s4:libcli/ldap: verify the server certificate and hostname if configured
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11752
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Mon, 21 Mar 2016 02:56:22 +0000 (03:56 +0100)]
CVE-2016-2113: s4:selftest: explicitly use '--option="tlsverifypeer=no_check" for some ldaps tests
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11752
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Wed, 23 Dec 2015 21:12:56 +0000 (22:12 +0100)]
CVE-2016-2113: docs-xml: add "tls verify peer" option defaulting to "no_check"
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11752
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Wed, 23 Dec 2015 15:17:04 +0000 (16:17 +0100)]
CVE-2016-2113: s4:lib/tls: implement infrastructure to do peer verification
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11752
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
Stefan Metzmacher [Wed, 23 Dec 2015 14:39:48 +0000 (15:39 +0100)]
CVE-2016-2113: s4:lib/tls: create better certificates and sign the host cert with the ca cert
The generated ca cert (in ca.pem) was completely useless,
it could be replaced by cert.pem.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=11752
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Günther Deschner <gd@samba.org>
git.samba.org / samba.git / log