diff options
Diffstat (limited to 'package/network/services/samba36/patches/022-CVE-2015-5370-v3-6.patch')
| -rw-r--r-- | package/network/services/samba36/patches/022-CVE-2015-5370-v3-6.patch | 1791 |
1 files changed, 1791 insertions, 0 deletions
diff --git a/package/network/services/samba36/patches/022-CVE-2015-5370-v3-6.patch b/package/network/services/samba36/patches/022-CVE-2015-5370-v3-6.patch new file mode 100644 index 0000000000..36656ab882 --- /dev/null +++ b/package/network/services/samba36/patches/022-CVE-2015-5370-v3-6.patch @@ -0,0 +1,1791 @@ +From 8716bb5e03cc4f10e2d4edc704d8defe7e8045f1 Mon Sep 17 00:00:00 2001 +From: Stefan Metzmacher <metze@samba.org> +Date: Thu, 16 Jul 2015 22:46:05 +0200 +Subject: [PATCH 01/40] CVE-2015-5370: dcerpc.idl: add + DCERPC_{NCACN_PAYLOAD,FRAG}_MAX_SIZE defines +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +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> +--- + librpc/idl/dcerpc.idl | 2 ++ + 1 file changed, 2 insertions(+) + +--- a/librpc/idl/dcerpc.idl ++++ b/librpc/idl/dcerpc.idl +@@ -475,9 +475,11 @@ interface dcerpc + const uint8 DCERPC_PFC_OFFSET = 3; + const uint8 DCERPC_DREP_OFFSET = 4; + const uint8 DCERPC_FRAG_LEN_OFFSET = 8; ++ const uint32 DCERPC_FRAG_MAX_SIZE = 5840; + const uint8 DCERPC_AUTH_LEN_OFFSET = 10; + const uint8 DCERPC_CALL_ID_OFFSET = 12; + const uint8 DCERPC_NCACN_PAYLOAD_OFFSET = 16; ++ const uint32 DCERPC_NCACN_PAYLOAD_MAX_SIZE = 0x400000; /* 4 MByte */ + + /* little-endian flag */ + const uint8 DCERPC_DREP_LE = 0x10; +--- a/librpc/rpc/dcerpc_util.c ++++ b/librpc/rpc/dcerpc_util.c +@@ -92,31 +92,49 @@ uint8_t dcerpc_get_endian_flag(DATA_BLOB + * + * @return - A NTSTATUS error code. + */ +-NTSTATUS dcerpc_pull_auth_trailer(struct ncacn_packet *pkt, ++NTSTATUS dcerpc_pull_auth_trailer(const struct ncacn_packet *pkt, + TALLOC_CTX *mem_ctx, +- DATA_BLOB *pkt_trailer, ++ const DATA_BLOB *pkt_trailer, + struct dcerpc_auth *auth, +- uint32_t *auth_length, ++ uint32_t *_auth_length, + bool auth_data_only) + { + struct ndr_pull *ndr; + enum ndr_err_code ndr_err; +- uint32_t data_and_pad; ++ uint16_t data_and_pad; ++ uint16_t auth_length; ++ uint32_t tmp_length; + +- data_and_pad = pkt_trailer->length +- - (DCERPC_AUTH_TRAILER_LENGTH + pkt->auth_length); ++ ZERO_STRUCTP(auth); ++ if (_auth_length != NULL) { ++ *_auth_length = 0; ++ } ++ ++ /* Paranoia checks for auth_length. The caller should check this... */ ++ if (pkt->auth_length == 0) { ++ return NT_STATUS_INTERNAL_ERROR; ++ } ++ ++ /* Paranoia checks for auth_length. The caller should check this... */ ++ if (pkt->auth_length > pkt->frag_length) { ++ return NT_STATUS_INTERNAL_ERROR; ++ } ++ tmp_length = DCERPC_NCACN_PAYLOAD_OFFSET; ++ tmp_length += DCERPC_AUTH_TRAILER_LENGTH; ++ tmp_length += pkt->auth_length; ++ if (tmp_length > pkt->frag_length) { ++ return NT_STATUS_INTERNAL_ERROR; ++ } ++ if (pkt_trailer->length > UINT16_MAX) { ++ return NT_STATUS_INTERNAL_ERROR; ++ } + +- /* paranoia check for pad size. This would be caught anyway by +- the ndr_pull_advance() a few lines down, but it scared +- Jeremy enough for him to call me, so we might as well check +- it now, just to prevent someone posting a bogus YouTube +- video in the future. +- */ +- if (data_and_pad > pkt_trailer->length) { +- return NT_STATUS_INFO_LENGTH_MISMATCH; ++ auth_length = DCERPC_AUTH_TRAILER_LENGTH + pkt->auth_length; ++ if (pkt_trailer->length < auth_length) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; + } + +- *auth_length = pkt_trailer->length - data_and_pad; ++ data_and_pad = pkt_trailer->length - auth_length; + + ndr = ndr_pull_init_blob(pkt_trailer, mem_ctx); + if (!ndr) { +@@ -136,14 +154,28 @@ NTSTATUS dcerpc_pull_auth_trailer(struct + ndr_err = ndr_pull_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, auth); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + talloc_free(ndr); ++ ZERO_STRUCTP(auth); + return ndr_map_error2ntstatus(ndr_err); + } + ++ if (data_and_pad < auth->auth_pad_length) { ++ DEBUG(1, (__location__ ": ERROR: pad length mismatch. " ++ "Calculated %u got %u\n", ++ (unsigned)data_and_pad, ++ (unsigned)auth->auth_pad_length)); ++ talloc_free(ndr); ++ ZERO_STRUCTP(auth); ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ + if (auth_data_only && data_and_pad != auth->auth_pad_length) { +- DEBUG(1, (__location__ ": WARNING: pad length mismatch. " ++ DEBUG(1, (__location__ ": ERROR: pad length mismatch. " + "Calculated %u got %u\n", + (unsigned)data_and_pad, + (unsigned)auth->auth_pad_length)); ++ talloc_free(ndr); ++ ZERO_STRUCTP(auth); ++ return NT_STATUS_RPC_PROTOCOL_ERROR; + } + + DEBUG(6,(__location__ ": auth_pad_length %u\n", +@@ -152,6 +184,83 @@ NTSTATUS dcerpc_pull_auth_trailer(struct + talloc_steal(mem_ctx, auth->credentials.data); + talloc_free(ndr); + ++ if (_auth_length != NULL) { ++ *_auth_length = auth_length; ++ } ++ ++ return NT_STATUS_OK; ++} ++ ++/** ++* @brief Verify the fields in ncacn_packet header. ++* ++* @param pkt - The ncacn_packet strcuture ++* @param ptype - The expected PDU type ++* @param max_auth_info - The maximum size of a possible auth trailer ++* @param required_flags - The required flags for the pdu. ++* @param optional_flags - The possible optional flags for the pdu. ++* ++* @return - A NTSTATUS error code. ++*/ ++NTSTATUS dcerpc_verify_ncacn_packet_header(const struct ncacn_packet *pkt, ++ enum dcerpc_pkt_type ptype, ++ size_t max_auth_info, ++ uint8_t required_flags, ++ uint8_t optional_flags) ++{ ++ if (pkt->rpc_vers != 5) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ ++ if (pkt->rpc_vers_minor != 0) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ ++ if (pkt->auth_length > pkt->frag_length) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ ++ if (pkt->ptype != ptype) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ ++ if (max_auth_info > UINT16_MAX) { ++ return NT_STATUS_INTERNAL_ERROR; ++ } ++ ++ if (pkt->auth_length > 0) { ++ size_t max_auth_length; ++ ++ if (max_auth_info <= DCERPC_AUTH_TRAILER_LENGTH) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ max_auth_length = max_auth_info - DCERPC_AUTH_TRAILER_LENGTH; ++ ++ if (pkt->auth_length > max_auth_length) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ } ++ ++ if ((pkt->pfc_flags & required_flags) != required_flags) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ if (pkt->pfc_flags & ~(optional_flags|required_flags)) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ ++ if (pkt->drep[0] & ~DCERPC_DREP_LE) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ if (pkt->drep[1] != 0) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ if (pkt->drep[2] != 0) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ if (pkt->drep[3] != 0) { ++ return NT_STATUS_RPC_PROTOCOL_ERROR; ++ } ++ + return NT_STATUS_OK; + } + +--- a/librpc/rpc/rpc_common.h ++++ b/librpc/rpc/rpc_common.h +@@ -158,12 +158,17 @@ uint8_t dcerpc_get_endian_flag(DATA_BLOB + * + * @return - A NTSTATUS error code. + */ +-NTSTATUS dcerpc_pull_auth_trailer(struct ncacn_packet *pkt, ++NTSTATUS dcerpc_pull_auth_trailer(const struct ncacn_packet *pkt, + TALLOC_CTX *mem_ctx, +- DATA_BLOB *pkt_trailer, ++ const DATA_BLOB *pkt_trailer, + struct dcerpc_auth *auth, + uint32_t *auth_length, + bool auth_data_only); ++NTSTATUS dcerpc_verify_ncacn_packet_header(const struct ncacn_packet *pkt, ++ enum dcerpc_pkt_type ptype, ++ size_t max_auth_info, ++ uint8_t required_flags, ++ uint8_t optional_flags); + struct tevent_req *dcerpc_read_ncacn_packet_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct tstream_context *stream); +--- a/source3/librpc/rpc/dcerpc_helpers.c ++++ b/source3/librpc/rpc/dcerpc_helpers.c +@@ -210,47 +210,6 @@ NTSTATUS dcerpc_push_dcerpc_auth(TALLOC_ + } + + /** +-* @brief Decodes a dcerpc_auth blob +-* +-* @param mem_ctx The memory context on which to allocate the packet +-* elements +-* @param blob The blob of data to decode +-* @param r An empty dcerpc_auth structure, must not be NULL +-* +-* @return a NTSTATUS error code +-*/ +-NTSTATUS dcerpc_pull_dcerpc_auth(TALLOC_CTX *mem_ctx, +- const DATA_BLOB *blob, +- struct dcerpc_auth *r, +- bool bigendian) +-{ +- enum ndr_err_code ndr_err; +- struct ndr_pull *ndr; +- +- ndr = ndr_pull_init_blob(blob, mem_ctx); +- if (!ndr) { +- return NT_STATUS_NO_MEMORY; +- } +- if (bigendian) { +- ndr->flags |= LIBNDR_FLAG_BIGENDIAN; +- } +- +- ndr_err = ndr_pull_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, r); +- +- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { +- talloc_free(ndr); +- return ndr_map_error2ntstatus(ndr_err); +- } +- talloc_free(ndr); +- +- if (DEBUGLEVEL >= 10) { +- NDR_PRINT_DEBUG(dcerpc_auth, r); +- } +- +- return NT_STATUS_OK; +-} +- +-/** + * @brief Calculate how much data we can in a packet, including calculating + * auth token and pad lengths. + * +@@ -782,7 +741,7 @@ NTSTATUS dcerpc_add_auth_footer(struct p + auth->auth_type, + auth->auth_level, + pad_len, +- 1 /* context id. */, ++ auth->auth_context_id, + &auth_blob, + &auth_info); + if (!NT_STATUS_IS_OK(status)) { +@@ -844,19 +803,18 @@ NTSTATUS dcerpc_add_auth_footer(struct p + * + * @param auth The auth data for the connection + * @param pkt The actual ncacn_packet +-* @param pkt_trailer The stub_and_verifier part of the packet ++* @param pkt_trailer [in][out] The stub_and_verifier part of the packet, ++* the auth_trailer and padding will be removed. + * @param header_size The header size + * @param raw_pkt The whole raw packet data blob +-* @param pad_len [out] The padding length used in the packet + * + * @return A NTSTATUS error code + */ + NTSTATUS dcerpc_check_auth(struct pipe_auth_data *auth, + struct ncacn_packet *pkt, + DATA_BLOB *pkt_trailer, +- size_t header_size, +- DATA_BLOB *raw_pkt, +- size_t *pad_len) ++ uint8_t header_size, ++ DATA_BLOB *raw_pkt) + { + struct schannel_state *schannel_auth; + struct auth_ntlmssp_state *ntlmssp_ctx; +@@ -868,6 +826,14 @@ NTSTATUS dcerpc_check_auth(struct pipe_a + DATA_BLOB full_pkt; + DATA_BLOB data; + ++ /* ++ * These check should be done in the caller. ++ */ ++ SMB_ASSERT(raw_pkt->length == pkt->frag_length); ++ SMB_ASSERT(header_size <= pkt->frag_length); ++ SMB_ASSERT(pkt_trailer->length < pkt->frag_length); ++ SMB_ASSERT((pkt_trailer->length + header_size) <= pkt->frag_length); ++ + switch (auth->auth_level) { + case DCERPC_AUTH_LEVEL_PRIVACY: + DEBUG(10, ("Requested Privacy.\n")); +@@ -881,7 +847,6 @@ NTSTATUS dcerpc_check_auth(struct pipe_a + if (pkt->auth_length != 0) { + break; + } +- *pad_len = 0; + return NT_STATUS_OK; + + case DCERPC_AUTH_LEVEL_NONE: +@@ -890,7 +855,6 @@ NTSTATUS dcerpc_check_auth(struct pipe_a + "authenticated connection!\n")); + return NT_STATUS_INVALID_PARAMETER; + } +- *pad_len = 0; + return NT_STATUS_OK; + + default: +@@ -899,16 +863,8 @@ NTSTATUS dcerpc_check_auth(struct pipe_a + return NT_STATUS_INVALID_PARAMETER; + } + +- /* Paranioa checks for auth_length. */ +- if (pkt->auth_length > pkt->frag_length) { +- return NT_STATUS_INFO_LENGTH_MISMATCH; +- } +- if (((unsigned int)pkt->auth_length +- + DCERPC_AUTH_TRAILER_LENGTH < (unsigned int)pkt->auth_length) || +- ((unsigned int)pkt->auth_length +- + DCERPC_AUTH_TRAILER_LENGTH < DCERPC_AUTH_TRAILER_LENGTH)) { +- /* Integer wrap attempt. */ +- return NT_STATUS_INFO_LENGTH_MISMATCH; ++ if (pkt->auth_length == 0) { ++ return NT_STATUS_INVALID_PARAMETER; + } + + status = dcerpc_pull_auth_trailer(pkt, pkt, pkt_trailer, +@@ -917,10 +873,23 @@ NTSTATUS dcerpc_check_auth(struct pipe_a + return status; + } + ++ if (auth_info.auth_type != auth->auth_type) { ++ return NT_STATUS_INVALID_PARAMETER; ++ } ++ ++ if (auth_info.auth_level != auth->auth_level) { ++ return NT_STATUS_INVALID_PARAMETER; ++ } ++ ++ if (auth_info.auth_context_id != auth->auth_context_id) { ++ return NT_STATUS_INVALID_PARAMETER; ++ } ++ ++ pkt_trailer->length -= auth_length; + data = data_blob_const(raw_pkt->data + header_size, +- pkt_trailer->length - auth_length); +- full_pkt = data_blob_const(raw_pkt->data, +- raw_pkt->length - auth_info.credentials.length); ++ pkt_trailer->length); ++ full_pkt = data_blob_const(raw_pkt->data, raw_pkt->length); ++ full_pkt.length -= auth_info.credentials.length; + + switch (auth->auth_type) { + case DCERPC_AUTH_TYPE_NONE: +@@ -996,10 +965,13 @@ NTSTATUS dcerpc_check_auth(struct pipe_a + * pkt_trailer actually has a copy of the raw data, and they + * are still both used in later calls */ + if (auth->auth_level == DCERPC_AUTH_LEVEL_PRIVACY) { ++ if (pkt_trailer->length != data.length) { ++ return NT_STATUS_INVALID_PARAMETER; ++ } + memcpy(pkt_trailer->data, data.data, data.length); + } + +- *pad_len = auth_info.auth_pad_length; ++ pkt_trailer->length -= auth_info.auth_pad_length; + data_blob_free(&auth_info.credentials); + return NT_STATUS_OK; + } +--- a/source3/rpc_client/cli_pipe.c ++++ b/source3/rpc_client/cli_pipe.c +@@ -404,9 +404,9 @@ static NTSTATUS cli_pipe_validate_curren + DATA_BLOB *rdata, + DATA_BLOB *reply_pdu) + { +- struct dcerpc_response *r; ++ const struct dcerpc_response *r = NULL; ++ DATA_BLOB tmp_stub = data_blob_null; + NTSTATUS ret = NT_STATUS_OK; +- size_t pad_len = 0; + + /* + * Point the return values at the real data including the RPC +@@ -414,50 +414,128 @@ static NTSTATUS cli_pipe_validate_curren + */ + *rdata = *pdu; + ++ if ((pkt->ptype == DCERPC_PKT_BIND_ACK) && ++ !(pkt->pfc_flags & DCERPC_PFC_FLAG_LAST)) { ++ /* ++ * TODO: do we still need this hack which was introduced ++ * in commit a42afcdcc7ab9aa9ed193ae36d3dbb10843447f0. ++ * ++ * I don't even know what AS/U might be... ++ */ ++ DEBUG(5, (__location__ ": bug in server (AS/U?), setting " ++ "fragment first/last ON.\n")); ++ pkt->pfc_flags |= DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST; ++ } ++ + /* Ensure we have the correct type. */ + switch (pkt->ptype) { +- case DCERPC_PKT_ALTER_RESP: ++ case DCERPC_PKT_BIND_NAK: ++ DEBUG(1, (__location__ ": Bind NACK received from %s!\n", ++ rpccli_pipe_txt(talloc_tos(), cli))); ++ ++ ret = dcerpc_verify_ncacn_packet_header(pkt, ++ DCERPC_PKT_BIND_NAK, ++ 0, /* max_auth_info */ ++ DCERPC_PFC_FLAG_FIRST | ++ DCERPC_PFC_FLAG_LAST, ++ 0); /* optional flags */ ++ if (!NT_STATUS_IS_OK(ret)) { ++ DEBUG(1, (__location__ ": Connection to %s got an unexpected " ++ "RPC packet type - %u, expected %u: %s\n", ++ rpccli_pipe_txt(talloc_tos(), cli), ++ pkt->ptype, expected_pkt_type, ++ nt_errstr(ret))); ++ NDR_PRINT_DEBUG(ncacn_packet, pkt); ++ return ret; ++ } ++ ++ /* Use this for now... */ ++ return NT_STATUS_NETWORK_ACCESS_DENIED; ++ + case DCERPC_PKT_BIND_ACK: ++ ret = dcerpc_verify_ncacn_packet_header(pkt, ++ expected_pkt_type, ++ pkt->u.bind_ack.auth_info.length, ++ DCERPC_PFC_FLAG_FIRST | ++ DCERPC_PFC_FLAG_LAST, ++ DCERPC_PFC_FLAG_CONC_MPX | ++ DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN); ++ if (!NT_STATUS_IS_OK(ret)) { ++ DEBUG(1, (__location__ ": Connection to %s got an unexpected " ++ "RPC packet type - %u, expected %u: %s\n", ++ rpccli_pipe_txt(talloc_tos(), cli), ++ pkt->ptype, expected_pkt_type, ++ nt_errstr(ret))); ++ NDR_PRINT_DEBUG(ncacn_packet, pkt); ++ return ret; ++ } + +- /* Client code never receives this kind of packets */ + break; + ++ case DCERPC_PKT_ALTER_RESP: ++ ret = dcerpc_verify_ncacn_packet_header(pkt, ++ expected_pkt_type, ++ pkt->u.alter_resp.auth_info.length, ++ DCERPC_PFC_FLAG_FIRST | ++ DCERPC_PFC_FLAG_LAST, ++ DCERPC_PFC_FLAG_CONC_MPX | ++ DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN); ++ if (!NT_STATUS_IS_OK(ret)) { ++ DEBUG(1, (__location__ ": Connection to %s got an unexpected " ++ "RPC packet type - %u, expected %u: %s\n", ++ rpccli_pipe_txt(talloc_tos(), cli), ++ pkt->ptype, expected_pkt_type, ++ nt_errstr(ret))); ++ NDR_PRINT_DEBUG(ncacn_packet, pkt); ++ return ret; ++ } ++ ++ break; + + case DCERPC_PKT_RESPONSE: + + r = &pkt->u.response; + ++ ret = dcerpc_verify_ncacn_packet_header(pkt, ++ expected_pkt_type, ++ r->stub_and_verifier.length, ++ 0, /* required_flags */ ++ DCERPC_PFC_FLAG_FIRST | ++ DCERPC_PFC_FLAG_LAST); ++ if (!NT_STATUS_IS_OK(ret)) { ++ DEBUG(1, (__location__ ": Connection to %s got an unexpected " ++ "RPC packet type - %u, expected %u: %s\n", ++ rpccli_pipe_txt(talloc_tos(), cli), ++ pkt->ptype, expected_pkt_type, ++ nt_errstr(ret))); ++ NDR_PRINT_DEBUG(ncacn_packet, pkt); ++ return ret; ++ } ++ ++ tmp_stub.data = r->stub_and_verifier.data; ++ tmp_stub.length = r->stub_and_verifier.length; ++ + /* Here's where we deal with incoming sign/seal. */ + ret = dcerpc_check_auth(cli->auth, pkt, +- &r->stub_and_verifier, ++ &tmp_stub, + DCERPC_RESPONSE_LENGTH, +- pdu, &pad_len); ++ pdu); + if (!NT_STATUS_IS_OK(ret)) { ++ DEBUG(1, (__location__ ": Connection to %s got an unexpected " ++ "RPC packet type - %u, expected %u: %s\n", ++ rpccli_pipe_txt(talloc_tos(), cli), ++ pkt->ptype, expected_pkt_type, ++ nt_errstr(ret))); ++ NDR_PRINT_DEBUG(ncacn_packet, pkt); + return ret; + } + +- if (pkt->frag_length < DCERPC_RESPONSE_LENGTH + pad_len) { +- return NT_STATUS_BUFFER_TOO_SMALL; +- } +- + /* Point the return values at the NDR data. */ +- rdata->data = r->stub_and_verifier.data; ++ *rdata = tmp_stub; + +- if (pkt->auth_length) { +- /* We've already done integer wrap tests in +- * dcerpc_check_auth(). */ +- rdata->length = r->stub_and_verifier.length +- - pad_len +- - DCERPC_AUTH_TRAILER_LENGTH +- - pkt->auth_length; +- } else { +- rdata->length = r->stub_and_verifier.length; +- } +- +- DEBUG(10, ("Got pdu len %lu, data_len %lu, ss_len %u\n", ++ DEBUG(10, ("Got pdu len %lu, data_len %lu\n", + (long unsigned int)pdu->length, +- (long unsigned int)rdata->length, +- (unsigned int)pad_len)); ++ (long unsigned int)rdata->length)); + + /* + * If this is the first reply, and the allocation hint is +@@ -478,14 +556,24 @@ static NTSTATUS cli_pipe_validate_curren + + break; + +- case DCERPC_PKT_BIND_NAK: +- DEBUG(1, (__location__ ": Bind NACK received from %s!\n", +- rpccli_pipe_txt(talloc_tos(), cli))); +- /* Use this for now... */ +- return NT_STATUS_NETWORK_ACCESS_DENIED; +- + case DCERPC_PKT_FAULT: + ++ ret = dcerpc_verify_ncacn_packet_header(pkt, ++ DCERPC_PKT_FAULT, ++ 0, /* max_auth_info */ ++ DCERPC_PFC_FLAG_FIRST | ++ DCERPC_PFC_FLAG_LAST, ++ DCERPC_PFC_FLAG_DID_NOT_EXECUTE); ++ if (!NT_STATUS_IS_OK(ret)) { ++ DEBUG(1, (__location__ ": Connection to %s got an unexpected " ++ "RPC packet type - %u, expected %u: %s\n", ++ rpccli_pipe_txt(talloc_tos(), cli), ++ pkt->ptype, expected_pkt_type, ++ nt_errstr(ret))); ++ NDR_PRINT_DEBUG(ncacn_packet, pkt); ++ return ret; ++ } ++ + DEBUG(1, (__location__ ": RPC fault code %s received " + "from %s!\n", + dcerpc_errstr(talloc_tos(), +@@ -502,13 +590,6 @@ static NTSTATUS cli_pipe_validate_curren + return NT_STATUS_RPC_PROTOCOL_ERROR; + } + +- if (pkt->ptype != expected_pkt_type) { +- DEBUG(3, (__location__ ": Connection to %s got an unexpected " +- "RPC packet type - %u, not %u\n", +- rpccli_pipe_txt(talloc_tos(), cli), +- pkt->ptype, expected_pkt_type)); +- return NT_STATUS_RPC_PROTOCOL_ERROR; +- } + + if (pkt->call_id != call_id) { + DEBUG(3, (__location__ ": Connection to %s got an unexpected " +@@ -518,17 +599,6 @@ static NTSTATUS cli_pipe_validate_curren + return NT_STATUS_RPC_PROTOCOL_ERROR; + } + +- /* Do this just before return - we don't want to modify any rpc header +- data before now as we may have needed to do cryptographic actions on +- it before. */ +- +- if ((pkt->ptype == DCERPC_PKT_BIND_ACK) && +- !(pkt->pfc_flags & DCERPC_PFC_FLAG_LAST)) { +- DEBUG(5, (__location__ ": bug in server (AS/U?), setting " +- "fragment first/last ON.\n")); +- pkt->pfc_flags |= DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST; +- } +- + return NT_STATUS_OK; + } + +@@ -883,6 +953,12 @@ static void rpc_api_pipe_got_pdu(struct + + state->pkt = talloc(state, struct ncacn_packet); + if (!state->pkt) { ++ /* ++ * TODO: do a real async disconnect ... ++ * ++ * For now do it sync... ++ */ ++ TALLOC_FREE(state->cli->transport); + tevent_req_nterror(req, NT_STATUS_NO_MEMORY); + return; + } +@@ -892,18 +968,16 @@ static void rpc_api_pipe_got_pdu(struct + state->pkt, + !state->endianess); + if (!NT_STATUS_IS_OK(status)) { ++ /* ++ * TODO: do a real async disconnect ... ++ * ++ * For now do it sync... ++ */ ++ TALLOC_FREE(state->cli->transport); + tevent_req_nterror(req, status); + return; + } + +- if (state->incoming_frag.length != state->pkt->frag_length) { +- DEBUG(5, ("Incorrect pdu length %u, expected %u\n", +- (unsigned int)state->incoming_frag.length, +- (unsigned int)state->pkt->frag_length)); +- tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); +- return; +- } +- + status = cli_pipe_validate_current_pdu(state, + state->cli, state->pkt, + &state->incoming_frag, +@@ -917,6 +991,28 @@ static void rpc_api_pipe_got_pdu(struct + (unsigned)state->reply_pdu_offset, + nt_errstr(status))); + ++ if (state->pkt->ptype != DCERPC_PKT_FAULT && !NT_STATUS_IS_OK(status)) { ++ /* ++ * TODO: do a real async disconnect ... ++ * ++ * For now do it sync... ++ */ ++ TALLOC_FREE(state->cli->transport); ++ } else if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROTOCOL_ERROR)) { ++ /* ++ * TODO: do a real async disconnect ... ++ * ++ * For now do it sync... ++ */ ++ TALLOC_FREE(state->cli->transport); ++ } else if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_SEC_PKG_ERROR)) { ++ /* ++ * TODO: do a real async disconnect ... ++ * ++ * For now do it sync... ++ */ ++ TALLOC_FREE(state->cli->transport); ++ } + if (!NT_STATUS_IS_OK(status)) { + tevent_req_nterror(req, status); + return; +@@ -941,7 +1037,24 @@ static void rpc_api_pipe_got_pdu(struct + "%s\n", + state->endianess?"little":"big", + state->pkt->drep[0]?"little":"big")); +- tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); ++ /* ++ * TODO: do a real async disconnect ... ++ * ++ * For now do it sync... ++ */ ++ TALLOC_FREE(state->cli->transport); ++ tevent_req_nterror(req, NT_STATUS_RPC_PROTOCOL_ERROR); ++ return; ++ } ++ ++ if (state->reply_pdu_offset + rdata.length > MAX_RPC_DATA_SIZE) { ++ /* ++ * TODO: do a real async disconnect ... ++ * ++ * For now do it sync... ++ */ ++ TALLOC_FREE(state->cli->transport); ++ tevent_req_nterror(req, NT_STATUS_RPC_PROTOCOL_ERROR); + return; + } + +@@ -949,6 +1062,12 @@ static void rpc_api_pipe_got_pdu(struct + if (state->reply_pdu.length < state->reply_pdu_offset + rdata.length) { + if (!data_blob_realloc(NULL, &state->reply_pdu, + state->reply_pdu_offset + rdata.length)) { ++ /* ++ * TODO: do a real async disconnect ... ++ * ++ * For now do it sync... ++ */ ++ TALLOC_FREE(state->cli->transport); + tevent_req_nterror(req, NT_STATUS_NO_MEMORY); + return; + } +@@ -978,6 +1097,14 @@ static void rpc_api_pipe_got_pdu(struct + subreq = get_complete_frag_send(state, state->ev, state->cli, + state->call_id, + &state->incoming_frag); ++ if (subreq == NULL) { ++ /* ++ * TODO: do a real async disconnect ... ++ * ++ * For now do it sync... ++ */ ++ TALLOC_FREE(state->cli->transport); ++ } + if (tevent_req_nomem(subreq, req)) { + return; + } +@@ -1247,7 +1374,7 @@ static NTSTATUS create_rpc_bind_req(TALL + auth->auth_type, + auth->auth_level, + 0, /* auth_pad_length */ +- 1, /* auth_context_id */ ++ auth->auth_context_id, + &auth_token, + &auth_info); + if (!NT_STATUS_IS_OK(ret)) { +@@ -1749,9 +1876,8 @@ static bool check_bind_response(const st + + static NTSTATUS create_rpc_bind_auth3(TALLOC_CTX *mem_ctx, + struct rpc_pipe_client *cli, +- uint32 rpc_call_id, +- enum dcerpc_AuthType auth_type, +- enum dcerpc_AuthLevel auth_level, ++ struct pipe_auth_data *auth, ++ uint32_t rpc_call_id, + DATA_BLOB *pauth_blob, + DATA_BLOB *rpc_out) + { +@@ -1761,10 +1887,10 @@ static NTSTATUS create_rpc_bind_auth3(TA + u.auth3._pad = 0; + + status = dcerpc_push_dcerpc_auth(mem_ctx, +- auth_type, +- auth_level, ++ auth->auth_type, ++ auth->auth_level, + 0, /* auth_pad_length */ +- 1, /* auth_context_id */ ++ auth->auth_context_id, + pauth_blob, + &u.auth3.auth_info); + if (!NT_STATUS_IS_OK(status)) { +@@ -1794,9 +1920,8 @@ static NTSTATUS create_rpc_bind_auth3(TA + ********************************************************************/ + + static NTSTATUS create_rpc_alter_context(TALLOC_CTX *mem_ctx, +- enum dcerpc_AuthType auth_type, +- enum dcerpc_AuthLevel auth_level, +- uint32 rpc_call_id, ++ struct pipe_auth_data *auth, ++ uint32_t rpc_call_id, + const struct ndr_syntax_id *abstract, + const struct ndr_syntax_id *transfer, + const DATA_BLOB *pauth_blob, /* spnego auth blob already created. */ +@@ -1806,10 +1931,10 @@ static NTSTATUS create_rpc_alter_context + NTSTATUS status; + + status = dcerpc_push_dcerpc_auth(mem_ctx, +- auth_type, +- auth_level, ++ auth->auth_type, ++ auth->auth_level, + 0, /* auth_pad_length */ +- 1, /* auth_context_id */ ++ auth->auth_context_id, + pauth_blob, + &auth_info); + if (!NT_STATUS_IS_OK(status)) { +@@ -1957,30 +2082,45 @@ static void rpc_pipe_bind_step_one_done( + rpc_pipe_bind_step_two_trigger(req); + return; + +- case DCERPC_AUTH_TYPE_NTLMSSP: +- case DCERPC_AUTH_TYPE_SPNEGO: +- case DCERPC_AUTH_TYPE_KRB5: +- /* Paranoid lenght checks */ +- if (pkt->frag_length < DCERPC_AUTH_TRAILER_LENGTH +- + pkt->auth_length) { +- tevent_req_nterror(req, +- NT_STATUS_INFO_LENGTH_MISMATCH); ++ default: ++ if (pkt->auth_length == 0) { ++ tevent_req_nterror(req, NT_STATUS_RPC_PROTOCOL_ERROR); + return; + } + /* get auth credentials */ +- status = dcerpc_pull_dcerpc_auth(talloc_tos(), +- &pkt->u.bind_ack.auth_info, +- &auth, false); ++ status = dcerpc_pull_auth_trailer(pkt, talloc_tos(), ++ &pkt->u.bind_ack.auth_info, ++ &auth, NULL, true); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("Failed to pull dcerpc auth: %s.\n", + nt_errstr(status))); + tevent_req_nterror(req, status); + return; + } +- break; + +- default: +- goto err_out; ++ if (auth.auth_type != pauth->auth_type) { ++ DEBUG(0, (__location__ " Auth type %u mismatch expected %u.\n", ++ auth.auth_type, pauth->auth_type)); ++ tevent_req_nterror(req, NT_STATUS_RPC_PROTOCOL_ERROR); ++ return; ++ } ++ ++ if (auth.auth_level != pauth->auth_level) { ++ DEBUG(0, (__location__ " Auth level %u mismatch expected %u.\n", ++ auth.auth_level, pauth->auth_level)); ++ tevent_req_nterror(req, NT_STATUS_RPC_PROTOCOL_ERROR); ++ return; ++ } ++ ++ if (auth.auth_context_id != pauth->auth_context_id) { ++ DEBUG(0, (__location__ " Auth context id %u mismatch expected %u.\n", ++ (unsigned)auth.auth_context_id, ++ (unsigned)pauth->auth_context_id)); ++ tevent_req_nterror(req, NT_STATUS_RPC_PROTOCOL_ERROR); ++ return; ++ } ++ ++ break; + } + + /* +@@ -2226,9 +2366,7 @@ static NTSTATUS rpc_bind_next_send(struc + /* Now prepare the alter context pdu. */ + data_blob_free(&state->rpc_out); + +- status = create_rpc_alter_context(state, +- auth->auth_type, +- auth->auth_level, ++ status = create_rpc_alter_context(state, auth, + state->rpc_call_id, + &state->cli->abstract_syntax, + &state->cli->transfer_syntax, +@@ -2261,10 +2399,8 @@ static NTSTATUS rpc_bind_finish_send(str + /* Now prepare the auth3 context pdu. */ + data_blob_free(&state->rpc_out); + +- status = create_rpc_bind_auth3(state, state->cli, ++ status = create_rpc_bind_auth3(state, state->cli, auth, + state->rpc_call_id, +- auth->auth_type, +- auth->auth_level, + auth_token, + &state->rpc_out); + if (!NT_STATUS_IS_OK(status)) { +@@ -2498,8 +2634,9 @@ static struct tevent_req *rpccli_bh_disc + /* + * TODO: do a real async disconnect ... + * +- * For now the caller needs to free rpc_cli ++ * For now we do it sync... + */ ++ TALLOC_FREE(hs->rpc_cli->transport); + hs->rpc_cli = NULL; + + tevent_req_done(req); +@@ -2636,6 +2773,7 @@ NTSTATUS rpccli_ncalrpc_bind_data(TALLOC + + result->auth_type = DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM; + result->auth_level = DCERPC_AUTH_LEVEL_CONNECT; ++ result->auth_context_id = 1; + + result->user_name = talloc_strdup(result, ""); + result->domain = talloc_strdup(result, ""); +@@ -2660,6 +2798,7 @@ NTSTATUS rpccli_anon_bind_data(TALLOC_CT + + result->auth_type = DCERPC_AUTH_TYPE_NONE; + result->auth_level = DCERPC_AUTH_LEVEL_NONE; ++ result->auth_context_id = 0; + + result->user_name = talloc_strdup(result, ""); + result->domain = talloc_strdup(result, ""); +@@ -2697,6 +2836,7 @@ static NTSTATUS rpccli_ntlmssp_bind_data + + result->auth_type = auth_type; + result->auth_level = auth_level; ++ result->auth_context_id = 1; + + result->user_name = talloc_strdup(result, username); + result->domain = talloc_strdup(result, domain); +@@ -2768,6 +2908,7 @@ NTSTATUS rpccli_schannel_bind_data(TALLO + + result->auth_type = DCERPC_AUTH_TYPE_SCHANNEL; + result->auth_level = auth_level; ++ result->auth_context_id = 1; + + result->user_name = talloc_strdup(result, ""); + result->domain = talloc_strdup(result, domain); +@@ -3432,6 +3573,7 @@ NTSTATUS cli_rpc_pipe_open_krb5(struct c + } + auth->auth_type = DCERPC_AUTH_TYPE_KRB5; + auth->auth_level = auth_level; ++ auth->auth_context_id = 1; + + if (!username) { + username = ""; +@@ -3502,6 +3644,7 @@ NTSTATUS cli_rpc_pipe_open_spnego_krb5(s + } + auth->auth_type = DCERPC_AUTH_TYPE_SPNEGO; + auth->auth_level = auth_level; ++ auth->auth_context_id = 1; + + if (!username) { + username = ""; +@@ -3576,6 +3719,7 @@ NTSTATUS cli_rpc_pipe_open_spnego_ntlmss + } + auth->auth_type = DCERPC_AUTH_TYPE_SPNEGO; + auth->auth_level = auth_level; ++ auth->auth_context_id = 1; + + if (!username) { + username = ""; +--- a/source4/rpc_server/dcesrv_auth.c ++++ b/source4/rpc_server/dcesrv_auth.c +@@ -46,7 +46,7 @@ bool dcesrv_auth_bind(struct dcesrv_call + NTSTATUS status; + uint32_t auth_length; + +- if (pkt->u.bind.auth_info.length == 0) { ++ if (pkt->auth_length == 0) { + dce_conn->auth_state.auth_info = NULL; + return true; + } +@@ -108,7 +108,7 @@ NTSTATUS dcesrv_auth_bind_ack(struct dce + struct dcesrv_connection *dce_conn = call->conn; + NTSTATUS status; + +- if (!call->conn->auth_state.gensec_security) { ++ if (call->pkt.auth_length == 0) { + return NT_STATUS_OK; + } + +@@ -155,10 +155,16 @@ bool dcesrv_auth_auth3(struct dcesrv_cal + NTSTATUS status; + uint32_t auth_length; + +- /* We can't work without an existing gensec state, and an new blob to feed it */ +- if (!dce_conn->auth_state.auth_info || +- !dce_conn->auth_state.gensec_security || +- pkt->u.auth3.auth_info.length == 0) { ++ if (pkt->auth_length == 0) { ++ return false; ++ } ++ ++ if (!dce_conn->auth_state.auth_info) { ++ return false; ++ } ++ ++ /* We can't work without an existing gensec state */ ++ if (!dce_conn->auth_state.gensec_security) { + return false; + } + +@@ -203,7 +209,7 @@ bool dcesrv_auth_alter(struct dcesrv_cal + uint32_t auth_length; + + /* on a pure interface change there is no auth blob */ +- if (pkt->u.alter.auth_info.length == 0) { ++ if (pkt->auth_length == 0) { + return true; + } + +@@ -238,8 +244,7 @@ NTSTATUS dcesrv_auth_alter_ack(struct dc + + /* on a pure interface change there is no auth_info structure + setup */ +- if (!call->conn->auth_state.auth_info || +- dce_conn->auth_state.auth_info->credentials.length == 0) { ++ if (call->pkt.auth_length == 0) { + return NT_STATUS_OK; + } + +@@ -315,6 +320,11 @@ bool dcesrv_auth_request(struct dcesrv_c + return false; + } + ++ if (pkt->auth_length == 0) { ++ DEBUG(1,("dcesrv_auth_request: unexpected auth_length of 0\n")); ++ return false; ++ } ++ + status = dcerpc_pull_auth_trailer(pkt, call, + &pkt->u.request.stub_and_verifier, + &auth, &auth_length, false); +--- a/source4/librpc/rpc/dcerpc.c ++++ b/source4/librpc/rpc/dcerpc.c +@@ -701,6 +701,14 @@ static NTSTATUS ncacn_pull_request_auth( + return NT_STATUS_INVALID_LEVEL; + } + ++ if (pkt->auth_length == 0) { ++ return NT_STATUS_INVALID_NETWORK_RESPONSE; ++ } ++ ++ if (c->security_state.generic_state == NULL) { ++ return NT_STATUS_INTERNAL_ERROR; ++ } ++ + status = dcerpc_pull_auth_trailer(pkt, mem_ctx, + &pkt->u.response.stub_and_verifier, + &auth, &auth_length, false); +@@ -1074,7 +1082,7 @@ static void dcerpc_bind_recv_handler(str + } + + /* the bind_ack might contain a reply set of credentials */ +- if (conn->security_state.auth_info && pkt->u.bind_ack.auth_info.length) { ++ if (conn->security_state.auth_info && pkt->auth_length) { + NTSTATUS status; + uint32_t auth_length; + status = dcerpc_pull_auth_trailer(pkt, conn, &pkt->u.bind_ack.auth_info, +@@ -1847,8 +1855,7 @@ static void dcerpc_alter_recv_handler(st + } + + /* the alter_resp might contain a reply set of credentials */ +- if (recv_pipe->conn->security_state.auth_info && +- pkt->u.alter_resp.auth_info.length) { ++ if (recv_pipe->conn->security_state.auth_info && pkt->auth_length) { + struct dcecli_connection *conn = recv_pipe->conn; + NTSTATUS status; + uint32_t auth_length; +--- a/source3/librpc/rpc/dcerpc.h ++++ b/source3/librpc/rpc/dcerpc.h +@@ -42,6 +42,7 @@ struct pipe_auth_data { + bool verified_bitmask1; + + void *auth_ctx; ++ uint32_t auth_context_id; + + /* Only the client code uses these 3 for now */ + char *domain; +@@ -71,10 +72,6 @@ NTSTATUS dcerpc_push_dcerpc_auth(TALLOC_ + uint32_t auth_context_id, + const DATA_BLOB *credentials, + DATA_BLOB *blob); +-NTSTATUS dcerpc_pull_dcerpc_auth(TALLOC_CTX *mem_ctx, +- const DATA_BLOB *blob, +- struct dcerpc_auth *r, +- bool bigendian); + NTSTATUS dcerpc_guess_sizes(struct pipe_auth_data *auth, + size_t header_len, size_t data_left, + size_t max_xmit_frag, size_t pad_alignment, +@@ -85,9 +82,8 @@ NTSTATUS dcerpc_add_auth_footer(struct p + NTSTATUS dcerpc_check_auth(struct pipe_auth_data *auth, + struct ncacn_packet *pkt, + DATA_BLOB *pkt_trailer, +- size_t header_size, +- DATA_BLOB *raw_pkt, +- size_t *pad_len); ++ uint8_t header_size, ++ DATA_BLOB *raw_pkt); + + /* The following definitions come from librpc/rpc/rpc_common.c */ + +--- a/source3/rpc_server/srv_pipe.c ++++ b/source3/rpc_server/srv_pipe.c +@@ -42,6 +42,7 @@ + #include "auth.h" + #include "ntdomain.h" + #include "rpc_server/srv_pipe.h" ++#include "../librpc/gen_ndr/ndr_dcerpc.h" + #include "../librpc/ndr/ndr_dcerpc.h" + + #undef DBGC_CLASS +@@ -270,10 +271,14 @@ static bool setup_bind_nak(struct pipes_ + p->out_data.data_sent_length = 0; + p->out_data.current_pdu_sent = 0; + ++ set_incoming_fault(p); + TALLOC_FREE(p->auth.auth_ctx); + p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE; + p->auth.auth_type = DCERPC_AUTH_TYPE_NONE; + p->pipe_bound = False; ++ p->allow_bind = false; ++ p->allow_alter = false; ++ p->allow_auth3 = false; + + return True; + } +@@ -339,16 +344,46 @@ static bool check_bind_req(struct pipes_ + DEBUG(3,("check_bind_req for %s\n", + get_pipe_name_from_syntax(talloc_tos(), abstract))); + ++ ok = ndr_syntax_id_equal(transfer, &ndr_transfer_syntax); ++ if (!ok) { ++ DEBUG(1,("check_bind_req unknown transfer syntax for " ++ "%s context_id=%u\n", ++ get_pipe_name_from_syntax(talloc_tos(), abstract), ++ (unsigned)context_id)); ++ return false; ++ } ++ ++ for (context_fns = p->contexts; ++ context_fns != NULL; ++ context_fns = context_fns->next) ++ { ++ if (context_fns->context_id != context_id) { ++ continue; ++ } ++ ++ ok = ndr_syntax_id_equal(&context_fns->syntax, ++ abstract); ++ if (ok) { ++ return true; ++ } ++ ++ DEBUG(1,("check_bind_req: changing abstract syntax for " ++ "%s context_id=%u into %s not supported\n", ++ get_pipe_name_from_syntax(talloc_tos(), &context_fns->syntax), ++ (unsigned)context_id, ++ get_pipe_name_from_syntax(talloc_tos(), abstract))); ++ return false; ++ } ++ + /* we have to check all now since win2k introduced a new UUID on the lsaprpc pipe */ +- if (rpc_srv_pipe_exists_by_id(abstract) && +- ndr_syntax_id_equal(transfer, &ndr_transfer_syntax)) { +- DEBUG(3, ("check_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n", +- rpc_srv_get_pipe_cli_name(abstract), +- rpc_srv_get_pipe_srv_name(abstract))); +- } else { ++ if (!rpc_srv_pipe_exists_by_id(abstract)) { + return false; + } + ++ DEBUG(3, ("check_bind_req: %s -> %s rpc service\n", ++ rpc_srv_get_pipe_cli_name(abstract), ++ rpc_srv_get_pipe_srv_name(abstract))); ++ + context_fns = SMB_MALLOC_P(struct pipe_rpc_fns); + if (context_fns == NULL) { + DEBUG(0,("check_bind_req: malloc() failed!\n")); +@@ -447,6 +482,7 @@ static bool pipe_spnego_auth_bind(struct + + p->auth.auth_ctx = spnego_ctx; + p->auth.auth_type = DCERPC_AUTH_TYPE_SPNEGO; ++ p->auth.auth_context_id = auth_info->auth_context_id; + + DEBUG(10, ("SPNEGO auth started\n")); + +@@ -557,6 +593,7 @@ static bool pipe_schannel_auth_bind(stru + /* We're finished with this bind - no more packets. */ + p->auth.auth_ctx = schannel_auth; + p->auth.auth_type = DCERPC_AUTH_TYPE_SCHANNEL; ++ p->auth.auth_context_id = auth_info->auth_context_id; + + p->pipe_bound = True; + +@@ -601,6 +638,7 @@ static bool pipe_ntlmssp_auth_bind(struc + + p->auth.auth_ctx = ntlmssp_state; + p->auth.auth_type = DCERPC_AUTH_TYPE_NTLMSSP; ++ p->auth.auth_context_id = auth_info->auth_context_id; + + DEBUG(10, (__location__ ": NTLMSSP auth started\n")); + +@@ -776,6 +814,11 @@ static NTSTATUS pipe_auth_verify_final(s + void *mech_ctx; + NTSTATUS status; + ++ if (p->auth.auth_type == DCERPC_AUTH_TYPE_NONE) { ++ p->pipe_bound = true; ++ return NT_STATUS_OK; ++ } ++ + switch (p->auth.auth_type) { + case DCERPC_AUTH_TYPE_NTLMSSP: + ntlmssp_ctx = talloc_get_type_abort(p->auth.auth_ctx, +@@ -867,16 +910,38 @@ static bool api_pipe_bind_req(struct pip + DATA_BLOB auth_resp = data_blob_null; + DATA_BLOB auth_blob = data_blob_null; + +- /* No rebinds on a bound pipe - use alter context. */ +- if (p->pipe_bound) { +- DEBUG(2,("api_pipe_bind_req: rejecting bind request on bound " +- "pipe %s.\n", +- get_pipe_name_from_syntax(talloc_tos(), &p->syntax))); ++ if (!p->allow_bind) { ++ DEBUG(2,("Pipe not in allow bind state\n")); + return setup_bind_nak(p, pkt); + } ++ p->allow_bind = false; ++ ++ status = dcerpc_verify_ncacn_packet_header(pkt, ++ DCERPC_PKT_BIND, ++ pkt->u.bind.auth_info.length, ++ 0, /* required flags */ ++ DCERPC_PFC_FLAG_FIRST | ++ DCERPC_PFC_FLAG_LAST | ++ DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN | ++ 0x08 | /* this is not defined, but should be ignored */ ++ DCERPC_PFC_FLAG_CONC_MPX | ++ DCERPC_PFC_FLAG_DID_NOT_EXECUTE | ++ DCERPC_PFC_FLAG_MAYBE | ++ DCERPC_PFC_FLAG_OBJECT_UUID); ++ if (!NT_STATUS_IS_OK(status)) { ++ DEBUG(1, ("api_pipe_bind_req: invalid pdu: %s\n", ++ nt_errstr(status))); ++ NDR_PRINT_DEBUG(ncacn_packet, pkt); ++ goto err_exit; ++ } + + if (pkt->u.bind.num_contexts == 0) { +- DEBUG(0, ("api_pipe_bind_req: no rpc contexts around\n")); ++ DEBUG(1, ("api_pipe_bind_req: no rpc contexts around\n")); ++ goto err_exit; ++ } ++ ++ if (pkt->u.bind.ctx_list[0].num_transfer_syntaxes == 0) { ++ DEBUG(1, ("api_pipe_bind_req: no transfer syntaxes around\n")); + goto err_exit; + } + +@@ -960,25 +1025,12 @@ static bool api_pipe_bind_req(struct pip + * Check if this is an authenticated bind request. + */ + if (pkt->auth_length) { +- /* Quick length check. Won't catch a bad auth footer, +- * prevents overrun. */ +- +- if (pkt->frag_length < RPC_HEADER_LEN + +- DCERPC_AUTH_TRAILER_LENGTH + +- pkt->auth_length) { +- DEBUG(0,("api_pipe_bind_req: auth_len (%u) " +- "too long for fragment %u.\n", +- (unsigned int)pkt->auth_length, +- (unsigned int)pkt->frag_length)); +- goto err_exit; +- } +- + /* + * Decode the authentication verifier. + */ +- status = dcerpc_pull_dcerpc_auth(pkt, +- &pkt->u.bind.auth_info, +- &auth_info, p->endian); ++ status = dcerpc_pull_auth_trailer(pkt, pkt, ++ &pkt->u.bind.auth_info, ++ &auth_info, NULL, true); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n")); + goto err_exit; +@@ -1072,6 +1124,7 @@ static bool api_pipe_bind_req(struct pip + p->pipe_bound = True; + /* The session key was initialized from the SMB + * session in make_internal_rpc_pipe_p */ ++ p->auth.auth_context_id = 0; + } + + ZERO_STRUCT(u.bind_ack); +@@ -1113,15 +1166,15 @@ static bool api_pipe_bind_req(struct pip + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n", + nt_errstr(status))); ++ goto err_exit; + } + + if (auth_resp.length) { +- + status = dcerpc_push_dcerpc_auth(pkt, + auth_type, + auth_info.auth_level, +- 0, +- 1, /* auth_context_id */ ++ 0, /* pad_len */ ++ p->auth.auth_context_id, + &auth_resp, + &auth_blob); + if (!NT_STATUS_IS_OK(status)) { +@@ -1152,6 +1205,22 @@ static bool api_pipe_bind_req(struct pip + p->out_data.current_pdu_sent = 0; + + TALLOC_FREE(auth_blob.data); ++ ++ if (bind_ack_ctx.result == 0) { ++ p->allow_alter = true; ++ p->allow_auth3 = true; ++ if (p->auth.auth_type == DCERPC_AUTH_TYPE_NONE) { ++ status = pipe_auth_verify_final(p); ++ if (!NT_STATUS_IS_OK(status)) { ++ DEBUG(0, ("pipe_auth_verify_final failed: %s\n", ++ nt_errstr(status))); ++ goto err_exit; ++ } ++ } ++ } else { ++ goto err_exit; ++ } ++ + return True; + + err_exit: +@@ -1176,18 +1245,39 @@ bool api_pipe_bind_auth3(struct pipes_st + + DEBUG(5, ("api_pipe_bind_auth3: decode request. %d\n", __LINE__)); + +- if (pkt->auth_length == 0) { +- DEBUG(0, ("No auth field sent for bind request!\n")); ++ if (!p->allow_auth3) { ++ DEBUG(1, ("Pipe not in allow auth3 state.\n")); + goto err; + } + +- /* Ensure there's enough data for an authenticated request. */ +- if (pkt->frag_length < RPC_HEADER_LEN +- + DCERPC_AUTH_TRAILER_LENGTH +- + pkt->auth_length) { +- DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len " +- "%u is too large.\n", +- (unsigned int)pkt->auth_length)); ++ status = dcerpc_verify_ncacn_packet_header(pkt, ++ DCERPC_PKT_AUTH3, ++ pkt->u.auth3.auth_info.length, ++ 0, /* required flags */ ++ DCERPC_PFC_FLAG_FIRST | ++ DCERPC_PFC_FLAG_LAST | ++ DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN | ++ 0x08 | /* this is not defined, but should be ignored */ ++ DCERPC_PFC_FLAG_CONC_MPX | ++ DCERPC_PFC_FLAG_DID_NOT_EXECUTE | ++ DCERPC_PFC_FLAG_MAYBE | ++ DCERPC_PFC_FLAG_OBJECT_UUID); ++ if (!NT_STATUS_IS_OK(status)) { ++ DEBUG(1, ("api_pipe_bind_auth3: invalid pdu: %s\n", ++ nt_errstr(status))); ++ NDR_PRINT_DEBUG(ncacn_packet, pkt); ++ goto err; ++ } ++ ++ /* We can only finish if the pipe is unbound for now */ ++ if (p->pipe_bound) { ++ DEBUG(0, (__location__ ": Pipe already bound, " ++ "AUTH3 not supported!\n")); ++ goto err; ++ } ++ ++ if (pkt->auth_length == 0) { ++ DEBUG(1, ("No auth field sent for auth3 request!\n")); + goto err; + } + +@@ -1195,9 +1285,9 @@ bool api_pipe_bind_auth3(struct pipes_st + * Decode the authentication verifier response. + */ + +- status = dcerpc_pull_dcerpc_auth(pkt, +- &pkt->u.auth3.auth_info, +- &auth_info, p->endian); ++ status = dcerpc_pull_auth_trailer(pkt, pkt, ++ &pkt->u.auth3.auth_info, ++ &auth_info, NULL, true); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("Failed to unmarshall dcerpc_auth.\n")); + goto err; +@@ -1215,6 +1305,21 @@ bool api_pipe_bind_auth3(struct pipes_st + goto err; + } + ++ if (auth_info.auth_level != p->auth.auth_level) { ++ DEBUG(1, ("Auth level mismatch! Client sent %d, " ++ "but auth was started as level %d!\n", ++ auth_info.auth_level, p->auth.auth_level)); ++ goto err; ++ } ++ ++ if (auth_info.auth_context_id != p->auth.auth_context_id) { ++ DEBUG(0, ("Auth context id mismatch! Client sent %u, " ++ "but auth was started as level %u!\n", ++ (unsigned)auth_info.auth_context_id, ++ (unsigned)p->auth.auth_context_id)); ++ goto err; ++ } ++ + switch (auth_info.auth_type) { + case DCERPC_AUTH_TYPE_NTLMSSP: + ntlmssp_ctx = talloc_get_type_abort(p->auth.auth_ctx, +@@ -1267,6 +1372,10 @@ bool api_pipe_bind_auth3(struct pipes_st + return true; + + err: ++ p->pipe_bound = false; ++ p->allow_bind = false; ++ p->allow_alter = false; ++ p->allow_auth3 = false; + + TALLOC_FREE(p->auth.auth_ctx); + return false; +@@ -1284,7 +1393,7 @@ static bool api_pipe_alter_context(struc + uint16 assoc_gid; + NTSTATUS status; + union dcerpc_payload u; +- struct dcerpc_ack_ctx bind_ack_ctx; ++ struct dcerpc_ack_ctx alter_ack_ctx; + DATA_BLOB auth_resp = data_blob_null; + DATA_BLOB auth_blob = data_blob_null; + int pad_len = 0; +@@ -1294,8 +1403,42 @@ static bool api_pipe_alter_context(struc + + DEBUG(5,("api_pipe_alter_context: make response. %d\n", __LINE__)); + +- if (pkt->u.bind.assoc_group_id != 0) { +- assoc_gid = pkt->u.bind.assoc_group_id; ++ if (!p->allow_alter) { ++ DEBUG(1, ("Pipe not in allow alter state.\n")); ++ goto err_exit; ++ } ++ ++ status = dcerpc_verify_ncacn_packet_header(pkt, ++ DCERPC_PKT_ALTER, ++ pkt->u.alter.auth_info.length, ++ 0, /* required flags */ ++ DCERPC_PFC_FLAG_FIRST | ++ DCERPC_PFC_FLAG_LAST | ++ DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN | ++ 0x08 | /* this is not defined, but should be ignored */ ++ DCERPC_PFC_FLAG_CONC_MPX | ++ DCERPC_PFC_FLAG_DID_NOT_EXECUTE | ++ DCERPC_PFC_FLAG_MAYBE | ++ DCERPC_PFC_FLAG_OBJECT_UUID); ++ if (!NT_STATUS_IS_OK(status)) { ++ DEBUG(1, ("api_pipe_alter_context: invalid pdu: %s\n", ++ nt_errstr(status))); ++ NDR_PRINT_DEBUG(ncacn_packet, pkt); ++ goto err_exit; ++ } ++ ++ if (pkt->u.alter.num_contexts == 0) { ++ DEBUG(1, ("api_pipe_alter_context: no rpc contexts around\n")); ++ goto err_exit; ++ } ++ ++ if (pkt->u.alter.ctx_list[0].num_transfer_syntaxes == 0) { ++ DEBUG(1, ("api_pipe_alter_context: no transfer syntaxes around\n")); ++ goto err_exit; ++ } ++ ++ if (pkt->u.alter.assoc_group_id != 0) { ++ assoc_gid = pkt->u.alter.assoc_group_id; + } else { + assoc_gid = 0x53f0; + } +@@ -1305,59 +1448,45 @@ static bool api_pipe_alter_context(struc + */ + + /* If the requested abstract synt uuid doesn't match our client pipe, +- reject the bind_ack & set the transfer interface synt to all 0's, ++ reject the alter_ack & set the transfer interface synt to all 0's, + ver 0 (observed when NT5 attempts to bind to abstract interfaces + unknown to NT4) + Needed when adding entries to a DACL from NT5 - SK */ + + if (check_bind_req(p, +- &pkt->u.bind.ctx_list[0].abstract_syntax, +- &pkt->u.bind.ctx_list[0].transfer_syntaxes[0], +- pkt->u.bind.ctx_list[0].context_id)) { +- +- bind_ack_ctx.result = 0; +- bind_ack_ctx.reason = 0; +- bind_ack_ctx.syntax = pkt->u.bind.ctx_list[0].transfer_syntaxes[0]; ++ &pkt->u.alter.ctx_list[0].abstract_syntax, ++ &pkt->u.alter.ctx_list[0].transfer_syntaxes[0], ++ pkt->u.alter.ctx_list[0].context_id)) { ++ ++ alter_ack_ctx.result = 0; ++ alter_ack_ctx.reason = 0; ++ alter_ack_ctx.syntax = pkt->u.alter.ctx_list[0].transfer_syntaxes[0]; + } else { +- p->pipe_bound = False; + /* Rejection reason: abstract syntax not supported */ +- bind_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT; +- bind_ack_ctx.reason = DCERPC_BIND_REASON_ASYNTAX; +- bind_ack_ctx.syntax = null_ndr_syntax_id; ++ alter_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT; ++ alter_ack_ctx.reason = DCERPC_BIND_REASON_ASYNTAX; ++ alter_ack_ctx.syntax = null_ndr_syntax_id; + } + + /* + * Check if this is an authenticated alter context request. + */ + if (pkt->auth_length) { +- /* Quick length check. Won't catch a bad auth footer, +- * prevents overrun. */ +- +- if (pkt->frag_length < RPC_HEADER_LEN + +- DCERPC_AUTH_TRAILER_LENGTH + +- pkt->auth_length) { +- DEBUG(0,("api_pipe_alter_context: auth_len (%u) " +- "too long for fragment %u.\n", +- (unsigned int)pkt->auth_length, +- (unsigned int)pkt->frag_length )); ++ /* We can only finish if the pipe is unbound for now */ ++ if (p->pipe_bound) { ++ DEBUG(0, (__location__ ": Pipe already bound, " ++ "Altering Context not yet supported!\n")); + goto err_exit; + } + +- status = dcerpc_pull_dcerpc_auth(pkt, +- &pkt->u.bind.auth_info, +- &auth_info, p->endian); ++ status = dcerpc_pull_auth_trailer(pkt, pkt, ++ &pkt->u.alter.auth_info, ++ &auth_info, NULL, true); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n")); + goto err_exit; + } + +- /* We can only finish if the pipe is unbound for now */ +- if (p->pipe_bound) { +- DEBUG(0, (__location__ ": Pipe already bound, " +- "Altering Context not yet supported!\n")); +- goto err_exit; +- } +- + if (auth_info.auth_type != p->auth.auth_type) { + DEBUG(0, ("Auth type mismatch! Client sent %d, " + "but auth was started as type %d!\n", +@@ -1365,6 +1494,20 @@ static bool api_pipe_alter_context(struc + goto err_exit; + } + ++ if (auth_info.auth_level != p->auth.auth_level) { ++ DEBUG(0, ("Auth level mismatch! Client sent %d, " ++ "but auth was started as level %d!\n", ++ auth_info.auth_level, p->auth.auth_level)); ++ goto err_exit; ++ } ++ ++ if (auth_info.auth_context_id != p->auth.auth_context_id) { ++ DEBUG(0, ("Auth context id mismatch! Client sent %u, " ++ "but auth was started as level %u!\n", ++ (unsigned)auth_info.auth_context_id, ++ (unsigned)p->auth.auth_context_id)); ++ goto err_exit; ++ } + + switch (auth_info.auth_type) { + case DCERPC_AUTH_TYPE_SPNEGO: +@@ -1431,7 +1574,7 @@ static bool api_pipe_alter_context(struc + u.alter_resp.secondary_address_size = 1; + + u.alter_resp.num_results = 1; +- u.alter_resp.ctx_list = &bind_ack_ctx; ++ u.alter_resp.ctx_list = &alter_ack_ctx; + + /* NOTE: We leave the auth_info empty so we can calculate the padding + * later and then append the auth_info --simo */ +@@ -1451,8 +1594,9 @@ static bool api_pipe_alter_context(struc + &u, + &p->out_data.frag); + if (!NT_STATUS_IS_OK(status)) { +- DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n", ++ DEBUG(0, ("Failed to marshall alter_resp packet. (%s)\n", + nt_errstr(status))); ++ goto err_exit; + } + + if (auth_resp.length) { +@@ -1469,7 +1613,7 @@ static bool api_pipe_alter_context(struc + auth_info.auth_type, + auth_info.auth_level, + pad_len, +- 1, /* auth_context_id */ ++ p->auth.auth_context_id, + &auth_resp, + &auth_blob); + if (!NT_STATUS_IS_OK(status)) { +@@ -1618,6 +1762,7 @@ static bool api_pipe_request(struct pipe + + if (!srv_pipe_check_verification_trailer(p, pkt, pipe_fns)) { + DEBUG(1, ("srv_pipe_check_verification_trailer: failed\n")); ++ set_incoming_fault(p); + setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_ACCESS_DENIED)); + data_blob_free(&p->out_data.rdata); + TALLOC_FREE(frame); +@@ -1756,7 +1901,11 @@ void set_incoming_fault(struct pipes_str + data_blob_free(&p->in_data.data); + p->in_data.pdu_needed_len = 0; + p->in_data.pdu.length = 0; +- p->fault_state = DCERPC_FAULT_CANT_PERFORM; ++ p->fault_state = DCERPC_NCA_S_PROTO_ERROR; ++ ++ p->allow_alter = false; ++ p->allow_auth3 = false; ++ p->pipe_bound = false; + + DEBUG(10, ("Setting fault state\n")); + } +@@ -1767,7 +1916,6 @@ static NTSTATUS dcesrv_auth_request(stru + { + NTSTATUS status; + size_t hdr_size = DCERPC_REQUEST_LENGTH; +- size_t pad_len; + + DEBUG(10, ("Checking request auth.\n")); + +@@ -1778,25 +1926,11 @@ static NTSTATUS dcesrv_auth_request(stru + /* in case of sealing this function will unseal the data in place */ + status = dcerpc_check_auth(auth, pkt, + &pkt->u.request.stub_and_verifier, +- hdr_size, raw_pkt, +- &pad_len); ++ hdr_size, raw_pkt); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + +- +- /* remove padding and auth trailer, +- * this way the caller will get just the data */ +- if (pkt->auth_length) { +- size_t trail_len = pad_len +- + DCERPC_AUTH_TRAILER_LENGTH +- + pkt->auth_length; +- if (pkt->u.request.stub_and_verifier.length < trail_len) { +- return NT_STATUS_INFO_LENGTH_MISMATCH; +- } +- pkt->u.request.stub_and_verifier.length -= trail_len; +- } +- + return NT_STATUS_OK; + } + +@@ -1816,6 +1950,29 @@ static bool process_request_pdu(struct p + return False; + } + ++ /* ++ * We don't ignore DCERPC_PFC_FLAG_PENDING_CANCEL. ++ * TODO: we can reject it with DCERPC_FAULT_NO_CALL_ACTIVE later. ++ */ ++ status = dcerpc_verify_ncacn_packet_header(pkt, ++ DCERPC_PKT_REQUEST, ++ pkt->u.request.stub_and_verifier.length, ++ 0, /* required_flags */ ++ DCERPC_PFC_FLAG_FIRST | ++ DCERPC_PFC_FLAG_LAST | ++ 0x08 | /* this is not defined, but should be ignored */ ++ DCERPC_PFC_FLAG_CONC_MPX | ++ DCERPC_PFC_FLAG_DID_NOT_EXECUTE | ++ DCERPC_PFC_FLAG_MAYBE | ++ DCERPC_PFC_FLAG_OBJECT_UUID); ++ if (!NT_STATUS_IS_OK(status)) { ++ DEBUG(1, ("process_request_pdu: invalid pdu: %s\n", ++ nt_errstr(status))); ++ NDR_PRINT_DEBUG(ncacn_packet, pkt); ++ set_incoming_fault(p); ++ return false; ++ } ++ + /* Store the opnum */ + p->opnum = pkt->u.request.opnum; + +@@ -2065,7 +2222,7 @@ done: + "pipe %s\n", get_pipe_name_from_syntax(talloc_tos(), + &p->syntax))); + set_incoming_fault(p); +- setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR)); ++ setup_fault_pdu(p, NT_STATUS(DCERPC_NCA_S_PROTO_ERROR)); + TALLOC_FREE(pkt); + } else { + /* +--- a/source3/include/ntdomain.h ++++ b/source3/include/ntdomain.h +@@ -135,6 +135,13 @@ struct pipes_struct { + bool pipe_bound; + + /* ++ * States we can be in. ++ */ ++ bool allow_alter; ++ bool allow_bind; ++ bool allow_auth3; ++ ++ /* + * Set the DCERPC_FAULT to return. + */ + +--- a/source3/rpc_server/rpc_ncacn_np.c ++++ b/source3/rpc_server/rpc_ncacn_np.c +@@ -171,6 +171,7 @@ struct pipes_struct *make_internal_rpc_p + + p->syntax = *syntax; + p->transport = NCALRPC; ++ p->allow_bind = true; + + DEBUG(4,("Created internal pipe %s (pipes_open=%d)\n", + get_pipe_name_from_syntax(talloc_tos(), syntax), pipes_open)); +@@ -780,6 +781,7 @@ static NTSTATUS rpc_pipe_open_external(T + } + result->auth->auth_type = DCERPC_AUTH_TYPE_NONE; + result->auth->auth_level = DCERPC_AUTH_LEVEL_NONE; ++ result->auth->auth_context_id = 0; + + status = rpccli_anon_bind_data(result, &auth); + if (!NT_STATUS_IS_OK(status)) { +--- a/source3/rpc_server/rpc_server.c ++++ b/source3/rpc_server/rpc_server.c +@@ -102,6 +102,7 @@ static int make_server_pipes_struct(TALL + p->syntax = id; + p->transport = transport; + p->ncalrpc_as_system = ncalrpc_as_system; ++ p->allow_bind = true; + + p->mem_ctx = talloc_named(p, 0, "pipe %s %p", pipe_name, p); + if (!p->mem_ctx) { +@@ -663,6 +664,12 @@ static void named_pipe_packet_done(struc + goto fail; + } + ++ if (npc->p->fault_state != 0) { ++ DEBUG(2, ("Disconnect after fault\n")); ++ sys_errno = EINVAL; ++ goto fail; ++ } ++ + /* clear out any data that may have been left around */ + npc->count = 0; + TALLOC_FREE(npc->iov); +@@ -1391,6 +1398,12 @@ static void dcerpc_ncacn_packet_done(str + goto fail; + } + ++ if (ncacn_conn->p->fault_state != 0) { ++ DEBUG(2, ("Disconnect after fault\n")); ++ sys_errno = EINVAL; ++ goto fail; ++ } ++ + /* clear out any data that may have been left around */ + ncacn_conn->count = 0; + TALLOC_FREE(ncacn_conn->iov); |