Attachment 15943 Details for Bug 14359 – patch for v4.12 branch

[patch] patch for v4.12 branch

rpchandle-fix-bug-14359-v4.12.patch (text/plain), 15.41 KB, created by Alexander Bokovoy on 2020-04-29 07:41:50 UTC

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Creator: Alexander Bokovoy

Created: 2020-04-29 07:41:50 UTC

Size: 15.41 KB

patch

obsolete

>From 9b29e5f726321e2b68e795ec6887c1207e9eac04 Mon Sep 17 00:00:00 2001
>From: Alexander Bokovoy <ab@samba.org>
>Date: Tue, 28 Apr 2020 21:59:46 +0300
>Subject: [PATCH] s3: pass DCE RPC handle type to create_policy_hnd
>
>Various RPC services expect policy handles of a specific type.
>
>s3 RPC server did not allow to create policy handles with a specific
>type while actually requiring that policy handle type itself in some
>places.
>
>Make sure we are able to specify the policy on-wire handle type when
>creating the policy handle. The changes follow s4 DCE RPC server
>implementation.
>
>The original logic to always set on-wire handle type to 0 can be tracked
>down to commit fdeea341ed1bae670382e45eb731db1b5838ad21 when we didn't
>really know about differences in on-wire handle types.
>
>All but LSA trusted domain RPC calls do not check the on-wire handle
>type in s3 RPC server.
>
>Fixes trusted domain operations when Samba RPC client attempts to call
>s3 RPC server to perform lsa_lsaRSetForestTrustInformation in FreeIPA.
>This fix is a pre-requisite for FreeIPA-FreeIPA forest trust.
>
>BUG: https://bugzilla.samba.org/show_bug.cgi?id=14359
>
>Signed-off-by: Alexander Bokovoy <ab@samba.org>
>Reviewed-by: Jeremy Allison <jra@samba.org>
>
>Autobuild-User(master): Jeremy Allison <jra@samba.org>
>Autobuild-Date(master): Tue Apr 28 22:55:29 UTC 2020 on sn-devel-184
>
>(cherry picked from commit c7a4578d06427a82ead287f0c5248c1a54cc9336)
>---
> source3/rpc_server/epmapper/srv_epmapper.c    |  7 +-
> source3/rpc_server/eventlog/srv_eventlog_nt.c |  2 +-
> source3/rpc_server/lsa/srv_lsa_nt.c           |  2 +-
> source3/rpc_server/mdssvc/srv_mdssvc_nt.c     |  2 +-
> source3/rpc_server/rpc_handles.c              | 30 ++++---
> source3/rpc_server/rpc_pipes.h                | 19 +++--
> source3/rpc_server/samr/srv_samr_nt.c         | 84 ++++++++++++++-----
> source3/rpc_server/spoolss/srv_spoolss_nt.c   |  2 +-
> source3/rpc_server/svcctl/srv_svcctl_nt.c     |  2 +-
> source3/rpc_server/winreg/srv_winreg_nt.c     |  6 +-
> 10 files changed, 108 insertions(+), 48 deletions(-)
>
>diff --git a/source3/rpc_server/epmapper/srv_epmapper.c b/source3/rpc_server/epmapper/srv_epmapper.c
>index 1785cbbcfff..eaa8f065401 100644
>--- a/source3/rpc_server/epmapper/srv_epmapper.c
>+++ b/source3/rpc_server/epmapper/srv_epmapper.c
>@@ -27,6 +27,9 @@
> #include "srv_epmapper.h"
> #include "auth.h"
> 
>+/* handle types for this module */
>+enum handle_types {HTYPE_LOOKUP};
>+
> typedef uint32_t error_status_t;
> 
> /* An endpoint combined with an interface description */
>@@ -680,7 +683,7 @@ error_status_t _epm_Lookup(struct pipes_struct *p,
> 			goto done;
> 		}
> 
>-		ok = create_policy_hnd(p, r->out.entry_handle, eps);
>+		ok = create_policy_hnd(p, r->out.entry_handle, HTYPE_LOOKUP, eps);
> 		if (!ok) {
> 			rc = EPMAPPER_STATUS_NO_MEMORY;
> 			goto done;
>@@ -1072,7 +1075,7 @@ error_status_t _epm_Map(struct pipes_struct *p,
> 		}
> 		/* end of "some algorithm" */
> 
>-		ok = create_policy_hnd(p, r->out.entry_handle, eps);
>+		ok = create_policy_hnd(p, r->out.entry_handle, HTYPE_LOOKUP, eps);
> 		if (!ok) {
> 			rc = EPMAPPER_STATUS_NO_MEMORY;
> 			goto done;
>diff --git a/source3/rpc_server/eventlog/srv_eventlog_nt.c b/source3/rpc_server/eventlog/srv_eventlog_nt.c
>index 9d8322adf34..3c6474269f0 100644
>--- a/source3/rpc_server/eventlog/srv_eventlog_nt.c
>+++ b/source3/rpc_server/eventlog/srv_eventlog_nt.c
>@@ -270,7 +270,7 @@ static NTSTATUS elog_open( struct pipes_struct * p, const char *logname, struct
> 
> 	/* create the policy handle */
> 
>-	if ( !create_policy_hnd( p, hnd, elog ) ) {
>+	if ( !create_policy_hnd( p, hnd, 0, elog ) ) {
> 		TALLOC_FREE(elog);
> 		return NT_STATUS_NO_MEMORY;
> 	}
>diff --git a/source3/rpc_server/lsa/srv_lsa_nt.c b/source3/rpc_server/lsa/srv_lsa_nt.c
>index 4adb3b2bf6c..614cc06261a 100644
>--- a/source3/rpc_server/lsa/srv_lsa_nt.c
>+++ b/source3/rpc_server/lsa/srv_lsa_nt.c
>@@ -371,7 +371,7 @@ static NTSTATUS create_lsa_policy_handle(TALLOC_CTX *mem_ctx,
> 		}
> 	}
> 
>-	if (!create_policy_hnd(p, handle, info)) {
>+	if (!create_policy_hnd(p, handle, type, info)) {
> 		talloc_free(info);
> 		ZERO_STRUCTP(handle);
> 		return NT_STATUS_NO_MEMORY;
>diff --git a/source3/rpc_server/mdssvc/srv_mdssvc_nt.c b/source3/rpc_server/mdssvc/srv_mdssvc_nt.c
>index 04287008a5c..cfccd38a4c6 100644
>--- a/source3/rpc_server/mdssvc/srv_mdssvc_nt.c
>+++ b/source3/rpc_server/mdssvc/srv_mdssvc_nt.c
>@@ -140,7 +140,7 @@ static NTSTATUS create_mdssvc_policy_handle(TALLOC_CTX *mem_ctx,
> 		return NT_STATUS_UNSUCCESSFUL;
> 	}
> 
>-	if (!create_policy_hnd(p, handle, mds_ctx)) {
>+	if (!create_policy_hnd(p, handle, 0, mds_ctx)) {
> 		talloc_free(mds_ctx);
> 		ZERO_STRUCTP(handle);
> 		return NT_STATUS_NO_MEMORY;
>diff --git a/source3/rpc_server/rpc_handles.c b/source3/rpc_server/rpc_handles.c
>index 453dab6905f..700cc64d26a 100644
>--- a/source3/rpc_server/rpc_handles.c
>+++ b/source3/rpc_server/rpc_handles.c
>@@ -250,8 +250,11 @@ bool init_pipe_handles(struct pipes_struct *p, const struct ndr_syntax_id *synta
>   data_ptr is TALLOC_FREE()'ed
> ****************************************************************************/
> 
>-static struct dcesrv_handle_old *create_rpc_handle_internal(struct pipes_struct *p,
>-				struct policy_handle *hnd, void *data_ptr)
>+static struct dcesrv_handle_old *create_rpc_handle_internal(
>+				struct pipes_struct *p,
>+				struct policy_handle *hnd,
>+				uint8_t handle_type,
>+				void *data_ptr)
> {
> 	struct dcesrv_handle_old *rpc_hnd = NULL;
> 	static uint32_t pol_hnd_low  = 0;
>@@ -279,8 +282,7 @@ static struct dcesrv_handle_old *create_rpc_handle_internal(struct pipes_struct
> 		pol_hnd_high++;
> 	}
> 
>-	/* first bit must be null */
>-	SIVAL(&rpc_hnd->wire_handle.handle_type, 0 , 0);
>+	SIVAL(&rpc_hnd->wire_handle.handle_type, 0 , handle_type);
> 
> 	/* second bit is incrementing */
> 	SIVAL(&rpc_hnd->wire_handle.uuid.time_low, 0 , pol_hnd_low);
>@@ -307,12 +309,14 @@ static struct dcesrv_handle_old *create_rpc_handle_internal(struct pipes_struct
> 	return rpc_hnd;
> }
> 
>-bool create_policy_hnd(struct pipes_struct *p, struct policy_handle *hnd,
>-		       void *data_ptr)
>+bool create_policy_hnd(struct pipes_struct *p,
>+			struct policy_handle *hnd,
>+			uint8_t handle_type,
>+			void *data_ptr)
> {
> 	struct dcesrv_handle_old *rpc_hnd = NULL;
> 
>-	rpc_hnd = create_rpc_handle_internal(p, hnd, data_ptr);
>+	rpc_hnd = create_rpc_handle_internal(p, hnd, handle_type, data_ptr);
> 	if (rpc_hnd == NULL) {
> 		return false;
> 	}
>@@ -450,9 +454,13 @@ bool pipe_access_check(struct pipes_struct *p)
> 	return True;
> }
> 
>-void *_policy_handle_create(struct pipes_struct *p, struct policy_handle *hnd,
>-			    uint32_t access_granted, size_t data_size,
>-			    const char *type, NTSTATUS *pstatus)
>+void *_policy_handle_create(struct pipes_struct *p,
>+			struct policy_handle *hnd,
>+			uint8_t handle_type,
>+			uint32_t access_granted,
>+			size_t data_size,
>+			const char *type,
>+			NTSTATUS *pstatus)
> {
> 	struct dcesrv_handle_old *rpc_hnd = NULL;
> 	void *data;
>@@ -474,7 +482,7 @@ void *_policy_handle_create(struct pipes_struct *p, struct policy_handle *hnd,
> 	}
> 	talloc_set_name_const(data, type);
> 
>-	rpc_hnd = create_rpc_handle_internal(p, hnd, data);
>+	rpc_hnd = create_rpc_handle_internal(p, hnd, handle_type, data);
> 	if (rpc_hnd == NULL) {
> 		TALLOC_FREE(data);
> 		*pstatus = NT_STATUS_NO_MEMORY;
>diff --git a/source3/rpc_server/rpc_pipes.h b/source3/rpc_server/rpc_pipes.h
>index 8a8f8e58169..5cdf2fdf6a2 100644
>--- a/source3/rpc_server/rpc_pipes.h
>+++ b/source3/rpc_server/rpc_pipes.h
>@@ -199,18 +199,25 @@ int close_internal_rpc_pipe_hnd(struct pipes_struct *p);
> 
> size_t num_pipe_handles(struct pipes_struct *p);
> bool init_pipe_handles(struct pipes_struct *p, const struct ndr_syntax_id *syntax);
>-bool create_policy_hnd(struct pipes_struct *p, struct policy_handle *hnd, void *data_ptr);
>+bool create_policy_hnd(struct pipes_struct *p,
>+			struct policy_handle *hnd,
>+			uint8_t handle_type,
>+			void *data_ptr);
> bool find_policy_by_hnd(struct pipes_struct *p, const struct policy_handle *hnd,
> 			void **data_p);
> bool close_policy_hnd(struct pipes_struct *p, struct policy_handle *hnd);
> void close_policy_by_pipe(struct pipes_struct *p);
> bool pipe_access_check(struct pipes_struct *p);
> 
>-void *_policy_handle_create(struct pipes_struct *p, struct policy_handle *hnd,
>-			    uint32_t access_granted, size_t data_size,
>-			    const char *type, NTSTATUS *pstatus);
>-#define policy_handle_create(_p, _hnd, _access, _type, _pstatus) \
>-	(_type *)_policy_handle_create((_p), (_hnd), (_access), sizeof(_type), #_type, \
>+void *_policy_handle_create(struct pipes_struct *p,
>+			struct policy_handle *hnd,
>+			uint8_t handle_type,
>+			uint32_t access_granted,
>+			size_t data_size,
>+			const char *type,
>+			NTSTATUS *pstatus);
>+#define policy_handle_create(_p, _hnd, _hnd_type, _access, _type, _pstatus) \
>+	(_type *)_policy_handle_create((_p), (_hnd), (_hnd_type), (_access), sizeof(_type), #_type, \
> 				       (_pstatus))
> 
> void *_policy_handle_find(struct pipes_struct *p,
>diff --git a/source3/rpc_server/samr/srv_samr_nt.c b/source3/rpc_server/samr/srv_samr_nt.c
>index ee3a5660358..1ebced46bb3 100644
>--- a/source3/rpc_server/samr/srv_samr_nt.c
>+++ b/source3/rpc_server/samr/srv_samr_nt.c
>@@ -65,6 +65,14 @@
> #define MAX_SAM_ENTRIES_W2K 0x400 /* 1024 */
> #define MAX_SAM_ENTRIES_W95 50
> 
>+enum samr_handle {
>+	SAMR_HANDLE_CONNECT,
>+	SAMR_HANDLE_DOMAIN,
>+	SAMR_HANDLE_USER,
>+	SAMR_HANDLE_GROUP,
>+	SAMR_HANDLE_ALIAS
>+};
>+
> struct samr_connect_info {
> 	uint8_t dummy;
> };
>@@ -498,8 +506,12 @@ NTSTATUS _samr_OpenDomain(struct pipes_struct *p,
> 		return NT_STATUS_NO_SUCH_DOMAIN;
> 	}
> 
>-	dinfo = policy_handle_create(p, r->out.domain_handle, acc_granted,
>-				     struct samr_domain_info, &status);
>+	dinfo = policy_handle_create(p,
>+				r->out.domain_handle,
>+				SAMR_HANDLE_DOMAIN,
>+				acc_granted,
>+				struct samr_domain_info,
>+				&status);
> 	if (!NT_STATUS_IS_OK(status)) {
> 		return status;
> 	}
>@@ -2221,8 +2233,12 @@ NTSTATUS _samr_OpenUser(struct pipes_struct *p,
> 	/* If we did the rid admins hack above, allow access. */
> 	acc_granted |= extra_access;
> 
>-	uinfo = policy_handle_create(p, r->out.user_handle, acc_granted,
>-				     struct samr_user_info, &nt_status);
>+	uinfo = policy_handle_create(p,
>+				r->out.user_handle,
>+				SAMR_HANDLE_USER,
>+				acc_granted,
>+				struct samr_user_info,
>+				&nt_status);
> 	if (!NT_STATUS_IS_OK(nt_status)) {
> 		return nt_status;
> 	}
>@@ -3790,8 +3806,12 @@ NTSTATUS _samr_CreateUser2(struct pipes_struct *p,
> 		return nt_status;
> 	}
> 
>-	uinfo = policy_handle_create(p, r->out.user_handle, acc_granted,
>-				     struct samr_user_info, &nt_status);
>+	uinfo = policy_handle_create(p,
>+				r->out.user_handle,
>+				SAMR_HANDLE_USER,
>+				acc_granted,
>+				struct samr_user_info,
>+				&nt_status);
> 	if (!NT_STATUS_IS_OK(nt_status)) {
> 		return nt_status;
> 	}
>@@ -3859,9 +3879,12 @@ NTSTATUS _samr_Connect(struct pipes_struct *p,
> 
> 	/* set up the SAMR connect_anon response */
> 
>-	(void)policy_handle_create(p, &hnd, acc_granted,
>-				    struct samr_connect_info,
>-				    &status);
>+	(void)policy_handle_create(p,
>+				&hnd,
>+				SAMR_HANDLE_CONNECT,
>+				acc_granted,
>+				struct samr_connect_info,
>+				&status);
> 	if (!NT_STATUS_IS_OK(status)) {
> 		return status;
> 	}
>@@ -3923,8 +3946,12 @@ NTSTATUS _samr_Connect2(struct pipes_struct *p,
> 	if ( !NT_STATUS_IS_OK(nt_status) )
> 		return nt_status;
> 
>-	(void)policy_handle_create(p, &hnd, acc_granted,
>-				    struct samr_connect_info, &nt_status);
>+	(void)policy_handle_create(p,
>+				&hnd,
>+				SAMR_HANDLE_CONNECT,
>+				acc_granted,
>+				struct samr_connect_info,
>+				&nt_status);
>         if (!NT_STATUS_IS_OK(nt_status)) {
>                 return nt_status;
>         }
>@@ -4160,8 +4187,12 @@ NTSTATUS _samr_OpenAlias(struct pipes_struct *p,
> 
> 	}
> 
>-	ainfo = policy_handle_create(p, r->out.alias_handle, acc_granted,
>-				     struct samr_alias_info, &status);
>+	ainfo = policy_handle_create(p,
>+				r->out.alias_handle,
>+				SAMR_HANDLE_ALIAS,
>+				acc_granted,
>+				struct samr_alias_info,
>+				&status);
> 	if (!NT_STATUS_IS_OK(status)) {
> 		return status;
> 	}
>@@ -5906,9 +5937,12 @@ NTSTATUS _samr_CreateDomainGroup(struct pipes_struct *p,
> 	if ( !NT_STATUS_IS_OK(status) )
> 		return status;
> 
>-	ginfo = policy_handle_create(p, r->out.group_handle,
>-				     GENERIC_RIGHTS_GROUP_ALL_ACCESS,
>-				     struct samr_group_info, &status);
>+	ginfo = policy_handle_create(p,
>+				r->out.group_handle,
>+				SAMR_HANDLE_GROUP,
>+				GENERIC_RIGHTS_GROUP_ALL_ACCESS,
>+				struct samr_group_info,
>+				&status);
>         if (!NT_STATUS_IS_OK(status)) {
>                 return status;
>         }
>@@ -5980,9 +6014,12 @@ NTSTATUS _samr_CreateDomAlias(struct pipes_struct *p,
> 		return NT_STATUS_ACCESS_DENIED;
> 	}
> 
>-	ainfo = policy_handle_create(p, r->out.alias_handle,
>-				     GENERIC_RIGHTS_ALIAS_ALL_ACCESS,
>-				     struct samr_alias_info, &result);
>+	ainfo = policy_handle_create(p,
>+				r->out.alias_handle,
>+				SAMR_HANDLE_ALIAS,
>+				GENERIC_RIGHTS_ALIAS_ALL_ACCESS,
>+				struct samr_alias_info,
>+				&result);
>         if (!NT_STATUS_IS_OK(result)) {
>                 return result;
>         }
>@@ -6386,9 +6423,12 @@ NTSTATUS _samr_OpenGroup(struct pipes_struct *p,
> 
> 	TALLOC_FREE(map);
> 
>-	ginfo = policy_handle_create(p, r->out.group_handle,
>-				     acc_granted,
>-				     struct samr_group_info, &status);
>+	ginfo = policy_handle_create(p,
>+				r->out.group_handle,
>+				SAMR_HANDLE_GROUP,
>+				acc_granted,
>+				struct samr_group_info,
>+				&status);
>         if (!NT_STATUS_IS_OK(status)) {
>                 return status;
>         }
>diff --git a/source3/rpc_server/spoolss/srv_spoolss_nt.c b/source3/rpc_server/spoolss/srv_spoolss_nt.c
>index d92963ec32a..c80fc2aac2d 100644
>--- a/source3/rpc_server/spoolss/srv_spoolss_nt.c
>+++ b/source3/rpc_server/spoolss/srv_spoolss_nt.c
>@@ -715,7 +715,7 @@ static WERROR open_printer_hnd(struct pipes_struct *p,
> 	talloc_set_destructor(new_printer, printer_entry_destructor);
> 
> 	/* This also steals the printer_handle on the policy_handle */
>-	if (!create_policy_hnd(p, hnd, new_printer)) {
>+	if (!create_policy_hnd(p, hnd, 0, new_printer)) {
> 		TALLOC_FREE(new_printer);
> 		return WERR_INVALID_HANDLE;
> 	}
>diff --git a/source3/rpc_server/svcctl/srv_svcctl_nt.c b/source3/rpc_server/svcctl/srv_svcctl_nt.c
>index ae787066873..9ba6fbb1fce 100644
>--- a/source3/rpc_server/svcctl/srv_svcctl_nt.c
>+++ b/source3/rpc_server/svcctl/srv_svcctl_nt.c
>@@ -257,7 +257,7 @@ static WERROR create_open_service_handle(struct pipes_struct *p,
> 
> 	/* store the SERVICE_INFO and create an open handle */
> 
>-	if ( !create_policy_hnd( p, handle, info ) ) {
>+	if ( !create_policy_hnd( p, handle, 0, info ) ) {
> 		result = WERR_ACCESS_DENIED;
> 		goto done;
> 	}
>diff --git a/source3/rpc_server/winreg/srv_winreg_nt.c b/source3/rpc_server/winreg/srv_winreg_nt.c
>index 6c3270d886a..d67608fdd76 100644
>--- a/source3/rpc_server/winreg/srv_winreg_nt.c
>+++ b/source3/rpc_server/winreg/srv_winreg_nt.c
>@@ -34,6 +34,8 @@
> #undef DBGC_CLASS
> #define DBGC_CLASS DBGC_RPC_SRV
> 
>+enum handle_types { HTYPE_REGVAL, HTYPE_REGKEY };
>+
> /******************************************************************
>  Find a registry key handle and return a struct registry_key *
>  *****************************************************************/
>@@ -81,7 +83,7 @@ static WERROR open_registry_key(struct pipes_struct *p,
> 		return result;
> 	}
> 
>-	if ( !create_policy_hnd( p, hnd, key ) ) {
>+	if ( !create_policy_hnd( p, hnd, HTYPE_REGKEY, key ) ) {
> 		return WERR_FILE_NOT_FOUND;
> 	}
> 
>@@ -710,7 +712,7 @@ WERROR _winreg_CreateKey(struct pipes_struct *p,
> 		return result;
> 	}
> 
>-	if (!create_policy_hnd(p, r->out.new_handle, new_key)) {
>+	if (!create_policy_hnd(p, r->out.new_handle, HTYPE_REGKEY, new_key)) {
> 		TALLOC_FREE(new_key);
> 		return WERR_FILE_NOT_FOUND;
> 	}
>-- 
>2.25.3
>

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Attachments on bug 14359: 15943 | 15944 | 15945 | 15946