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Commit 8932ae21 authored by Tatjana Azundris Nuernberg's avatar Tatjana Azundris Nuernberg
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Bug#11765687 (MySQL58677): No privilege on table / view, but can know #rows /... 

Bug#11765687 (MySQL58677): No privilege on table / view, but can know #rows / underlying table's name

1 - If a user had SHOW VIEW and SELECT privileges on a view and
this view was referencing another view, EXPLAIN SELECT on the outer
view (that the user had privileges on) could reveal the structure
of the underlying "inner" view as well as the number of rows in
the underlying tables, even if the user had privileges on none of
these referenced objects.

This happened because we used DEFINER's UID ("SUID") not just for
the view given in EXPLAIN, but also when checking privileges on
the underlying views (where we should use the UID of the EXPLAIN's
INVOKER instead).

We no longer run the EXPLAIN SUID (with DEFINER's privileges).
This prevents a possible exploit and makes permissions more
orthogonal.

2 - EXPLAIN SELECT would reveal a view's structure even if the user
did not have SHOW VIEW privileges for that view, as long as they
had SELECT privilege on the underlying tables.

Instead of requiring both SHOW VIEW privilege on a view and SELECT
privilege on all underlying tables, we were checking for presence
of either of them.

We now explicitly require SHOW VIEW and SELECT privileges on
the view we run EXPLAIN SELECT on, as well as all its
underlying views. We also require SELECT on all relevant
tables. 


mysql-test/r/view_grant.result:
  add extensive tests to illustrate desired behavior and
  prevent regressions (as always).
mysql-test/t/view_grant.test:
  add extensive tests to illustrate desired behavior and
  prevent regressions (as always).
sql/sql_view.cc:
  We no longer run the EXPLAIN SUID (with DEFINER's privileges).
  To achieve this, we use a temporary, SUID-less TABLE_LIST for
  the views while checking privileges.
parent 138df47b
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Showing with 605 additions and 15 deletions
mysql-test/r/view_grant.result
View file @ 8932ae21
......@@ -64,10 +64,12 @@ create view mysqltest.v1 (c,d) as select a+1,b+1 from mysqltest.t1;
create algorithm=temptable view mysqltest.v2 (c,d) as select a+1,b+1 from mysqltest.t1;
create view mysqltest.v3 (c,d) as select a+1,b+1 from mysqltest.t2;
create algorithm=temptable view mysqltest.v4 (c,d) as select a+1,b+1 from mysqltest.t2;
create view mysqltest.v5 (c,d) as select a+1,b+1 from mysqltest.t1;
grant select on mysqltest.v1 to mysqltest_1@localhost;
grant select on mysqltest.v2 to mysqltest_1@localhost;
grant select on mysqltest.v3 to mysqltest_1@localhost;
grant select on mysqltest.v4 to mysqltest_1@localhost;
grant show view on mysqltest.v5 to mysqltest_1@localhost;
select c from mysqltest.v1;
c
select c from mysqltest.v2;
......@@ -76,6 +78,8 @@ select c from mysqltest.v3;
c
select c from mysqltest.v4;
c
select c from mysqltest.v5;
ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for table 'v5'
show columns from mysqltest.v1;
Field Type Null Key Default Extra
c bigint(12) YES NULL
......@@ -100,16 +104,25 @@ explain select c from mysqltest.v4;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
show create view mysqltest.v4;
ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v4'
explain select c from mysqltest.v5;
ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for table 'v5'
show create view mysqltest.v5;
View Create View
v5 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v5` AS select (`mysqltest`.`t1`.`a` + 1) AS `c`,(`mysqltest`.`t1`.`b` + 1) AS `d` from `mysqltest`.`t1`
explain select c from mysqltest.v1;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
show create view mysqltest.v1;
ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v1'
grant show view on mysqltest.v1 to mysqltest_1@localhost;
grant select on mysqltest.t1 to mysqltest_1@localhost;
explain select c from mysqltest.v1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 0 const row not found
show create view mysqltest.v1;
ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v1'
View Create View
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v1` AS select (`mysqltest`.`t1`.`a` + 1) AS `c`,(`mysqltest`.`t1`.`b` + 1) AS `d` from `mysqltest`.`t1`
explain select c from mysqltest.v2;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 0 const row not found
2 DERIVED NULL NULL NULL NULL NULL NULL NULL no matching row in const table
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
show create view mysqltest.v2;
ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v2'
explain select c from mysqltest.v3;
......@@ -120,6 +133,11 @@ explain select c from mysqltest.v4;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
show create view mysqltest.v4;
ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v4'
explain select c from mysqltest.v5;
ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for table 'v5'
show create view mysqltest.v5;
View Create View
v5 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v5` AS select (`mysqltest`.`t1`.`a` + 1) AS `c`,(`mysqltest`.`t1`.`b` + 1) AS `d` from `mysqltest`.`t1`
grant show view on mysqltest.* to mysqltest_1@localhost;
explain select c from mysqltest.v1;
id select_type table type possible_keys key key_len ref rows Extra
......@@ -135,15 +153,12 @@ show create view mysqltest.v2;
View Create View
v2 CREATE ALGORITHM=TEMPTABLE DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v2` AS select (`mysqltest`.`t1`.`a` + 1) AS `c`,(`mysqltest`.`t1`.`b` + 1) AS `d` from `mysqltest`.`t1`
explain select c from mysqltest.v3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 system NULL NULL NULL NULL 0 const row not found
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
show create view mysqltest.v3;
View Create View
v3 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v3` AS select (`mysqltest`.`t2`.`a` + 1) AS `c`,(`mysqltest`.`t2`.`b` + 1) AS `d` from `mysqltest`.`t2`
explain select c from mysqltest.v4;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 0 const row not found
2 DERIVED NULL NULL NULL NULL NULL NULL NULL no matching row in const table
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
show create view mysqltest.v4;
View Create View
v4 CREATE ALGORITHM=TEMPTABLE DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v4` AS select (`mysqltest`.`t2`.`a` + 1) AS `c`,(`mysqltest`.`t2`.`b` + 1) AS `d` from `mysqltest`.`t2`
......@@ -945,4 +960,195 @@ DROP USER foo;
DROP VIEW db1.v1;
DROP TABLE db1.t1;
DROP DATABASE db1;
Bug #11765687/#58677:
No privilege on table/view, but can know #rows / underlying table's name
create database mysqltest1;
create table mysqltest1.t1 (i int);
create table mysqltest1.t2 (j int);
create table mysqltest1.t3 (k int, secret int);
create user alice@localhost;
create user bob@localhost;
create user cecil@localhost;
create user dan@localhost;
create user eugene@localhost;
create user fiona@localhost;
create user greg@localhost;
create user han@localhost;
create user inga@localhost;
create user jamie@localhost;
create user karl@localhost;
create user lena@localhost;
create user mhairi@localhost;
create user noam@localhost;
create user olga@localhost;
create user pjotr@localhost;
create user quintessa@localhost;
grant all privileges on mysqltest1.* to alice@localhost with grant option;
... as alice
create view v1 as select * from t1;
create view v2 as select * from v1, t2;
create view v3 as select k from t3;
grant select on mysqltest1.v1 to bob@localhost;
grant show view on mysqltest1.v1 to cecil@localhost;
grant select, show view on mysqltest1.v1 to dan@localhost;
grant select on mysqltest1.t1 to dan@localhost;
grant select on mysqltest1.* to eugene@localhost;
grant select, show view on mysqltest1.v2 to fiona@localhost;
grant select, show view on mysqltest1.v2 to greg@localhost;
grant show view on mysqltest1.v1 to greg@localhost;
grant select(k) on mysqltest1.t3 to han@localhost;
grant select, show view on mysqltest1.v3 to han@localhost;
grant select on mysqltest1.t1 to inga@localhost;
grant select on mysqltest1.t2 to inga@localhost;
grant select on mysqltest1.v1 to inga@localhost;
grant select, show view on mysqltest1.v2 to inga@localhost;
grant select on mysqltest1.t1 to jamie@localhost;
grant select on mysqltest1.t2 to jamie@localhost;
grant show view on mysqltest1.v1 to jamie@localhost;
grant select, show view on mysqltest1.v2 to jamie@localhost;
grant select on mysqltest1.t1 to karl@localhost;
grant select on mysqltest1.t2 to karl@localhost;
grant select, show view on mysqltest1.v1 to karl@localhost;
grant select on mysqltest1.v2 to karl@localhost;
grant select on mysqltest1.t1 to lena@localhost;
grant select on mysqltest1.t2 to lena@localhost;
grant select, show view on mysqltest1.v1 to lena@localhost;
grant show view on mysqltest1.v2 to lena@localhost;
grant select on mysqltest1.t1 to mhairi@localhost;
grant select on mysqltest1.t2 to mhairi@localhost;
grant select, show view on mysqltest1.v1 to mhairi@localhost;
grant select, show view on mysqltest1.v2 to mhairi@localhost;
grant select on mysqltest1.t1 to noam@localhost;
grant select, show view on mysqltest1.v1 to noam@localhost;
grant select, show view on mysqltest1.v2 to noam@localhost;
grant select on mysqltest1.t2 to olga@localhost;
grant select, show view on mysqltest1.v1 to olga@localhost;
grant select, show view on mysqltest1.v2 to olga@localhost;
grant select on mysqltest1.t1 to pjotr@localhost;
grant select on mysqltest1.t2 to pjotr@localhost;
grant select, show view on mysqltest1.v2 to pjotr@localhost;
grant select, show view on mysqltest1.v1 to quintessa@localhost;
... as bob
select * from v1;
i
explain select * from v1;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
... as cecil
select * from v1;
ERROR 42000: SELECT command denied to user 'cecil'@'localhost' for table 'v1'
explain select * from v1;
ERROR 42000: SELECT command denied to user 'cecil'@'localhost' for table 'v1'
... as dan
select * from v1;
i
explain select * from v1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 0 const row not found
... as eugene
select * from v1;
i
explain select * from v1;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
... as fiona
select * from v2;
i j
show create view v2;
View Create View
v2 CREATE ALGORITHM=UNDEFINED DEFINER=`alice`@`localhost` SQL SECURITY DEFINER VIEW `v2` AS select `v1`.`i` AS `i`,`t2`.`j` AS `j` from (`v1` join `t2`)
explain select * from t1;
ERROR 42000: SELECT command denied to user 'fiona'@'localhost' for table 't1'
explain select * from v1;
ERROR 42000: SELECT command denied to user 'fiona'@'localhost' for table 'v1'
explain select * from t2;
ERROR 42000: SELECT command denied to user 'fiona'@'localhost' for table 't2'
explain select * from v2;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
... as greg
select * from v2;
i j
explain select * from v1;
ERROR 42000: SELECT command denied to user 'greg'@'localhost' for table 'v1'
explain select * from v2;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
... as han
select * from t3;
ERROR 42000: SELECT command denied to user 'han'@'localhost' for table 't3'
explain select * from t3;
ERROR 42000: SELECT command denied to user 'han'@'localhost' for table 't3'
select k from t3;
k
explain select k from t3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 system NULL NULL NULL NULL 0 const row not found
select * from v3;
k
explain select * from v3;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 system NULL NULL NULL NULL 0 const row not found
... as inga
select * from v2;
i j
explain select * from v2;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
... as jamie
select * from v2;
i j
explain select * from v2;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
... as karl
select * from v2;
i j
explain select * from v2;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
... as lena
select * from v2;
ERROR 42000: SELECT command denied to user 'lena'@'localhost' for table 'v2'
explain select * from v2;
ERROR 42000: SELECT command denied to user 'lena'@'localhost' for table 'v2'
... as mhairi
select * from v2;
i j
explain select * from v2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 0 const row not found
1 SIMPLE t2 system NULL NULL NULL NULL 0 const row not found
... as noam
select * from v2;
i j
explain select * from v2;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
... as olga
select * from v2;
i j
explain select * from v2;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
... as pjotr
select * from v2;
i j
explain select * from v2;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
... as quintessa
select * from v1;
i
explain select * from v1;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
... as root again at last: clean-up time!
drop user alice@localhost;
drop user bob@localhost;
drop user cecil@localhost;
drop user dan@localhost;
drop user eugene@localhost;
drop user fiona@localhost;
drop user greg@localhost;
drop user han@localhost;
drop user inga@localhost;
drop user jamie@localhost;
drop user karl@localhost;
drop user lena@localhost;
drop user mhairi@localhost;
drop user noam@localhost;
drop user olga@localhost;
drop user pjotr@localhost;
drop user quintessa@localhost;
drop database mysqltest1;
End of 5.0 tests.
mysql-test/t/view_grant.test
View file @ 8932ae21
......@@ -121,21 +121,26 @@ create view mysqltest.v1 (c,d) as select a+1,b+1 from mysqltest.t1;
create algorithm=temptable view mysqltest.v2 (c,d) as select a+1,b+1 from mysqltest.t1;
create view mysqltest.v3 (c,d) as select a+1,b+1 from mysqltest.t2;
create algorithm=temptable view mysqltest.v4 (c,d) as select a+1,b+1 from mysqltest.t2;
# v5: SHOW VIEW, but no SELECT
create view mysqltest.v5 (c,d) as select a+1,b+1 from mysqltest.t1;
grant select on mysqltest.v1 to mysqltest_1@localhost;
grant select on mysqltest.v2 to mysqltest_1@localhost;
grant select on mysqltest.v3 to mysqltest_1@localhost;
grant select on mysqltest.v4 to mysqltest_1@localhost;
grant show view on mysqltest.v5 to mysqltest_1@localhost;
connection user1;
# all selects works
# all SELECTs works, except v5 which lacks SELECT privs
select c from mysqltest.v1;
select c from mysqltest.v2;
select c from mysqltest.v3;
select c from mysqltest.v4;
--error ER_TABLEACCESS_DENIED_ERROR
select c from mysqltest.v5;
# test of show coluns
show columns from mysqltest.v1;
show columns from mysqltest.v2;
# but explain/show do not
# explain/show fail
--error ER_VIEW_NO_EXPLAIN
explain select c from mysqltest.v1;
--error ER_TABLEACCESS_DENIED_ERROR
......@@ -152,15 +157,26 @@ show create view mysqltest.v3;
explain select c from mysqltest.v4;
--error ER_TABLEACCESS_DENIED_ERROR
show create view mysqltest.v4;
--error ER_TABLEACCESS_DENIED_ERROR
explain select c from mysqltest.v5;
show create view mysqltest.v5;
# missing SELECT on underlying t1, no SHOW VIEW on v1 either.
--error ER_VIEW_NO_EXPLAIN
explain select c from mysqltest.v1;
# missing SHOW VIEW
--error ER_TABLEACCESS_DENIED_ERROR
show create view mysqltest.v1;
# allow to see one of underlying table
connection root;
grant show view on mysqltest.v1 to mysqltest_1@localhost;
grant select on mysqltest.t1 to mysqltest_1@localhost;
connection user1;
# EXPLAIN of view on above table works
# EXPLAIN works
explain select c from mysqltest.v1;
--error ER_TABLEACCESS_DENIED_ERROR
show create view mysqltest.v1;
# missing SHOW VIEW
--error ER_VIEW_NO_EXPLAIN
explain select c from mysqltest.v2;
--error ER_TABLEACCESS_DENIED_ERROR
show create view mysqltest.v2;
......@@ -173,6 +189,11 @@ show create view mysqltest.v3;
explain select c from mysqltest.v4;
--error ER_TABLEACCESS_DENIED_ERROR
show create view mysqltest.v4;
# we have SHOW VIEW on v5, and SELECT on t1 -- not enough
--error ER_TABLEACCESS_DENIED_ERROR
explain select c from mysqltest.v5;
# we can SHOW CREATE VIEW though
show create view mysqltest.v5;
# allow to see any view in mysqltest database
connection root;
......@@ -182,8 +203,12 @@ explain select c from mysqltest.v1;
show create view mysqltest.v1;
explain select c from mysqltest.v2;
show create view mysqltest.v2;
# have SHOW VIEW | SELECT on v3, but no SELECT on t2
--error ER_VIEW_NO_EXPLAIN
explain select c from mysqltest.v3;
show create view mysqltest.v3;
# have SHOW VIEW | SELECT on v4, but no SELECT on t2
--error ER_VIEW_NO_EXPLAIN
explain select c from mysqltest.v4;
show create view mysqltest.v4;
......@@ -1232,7 +1257,336 @@ DROP TABLE db1.t1;
DROP DATABASE db1;
connection default;
--echo Bug #11765687/#58677:
--echo No privilege on table/view, but can know #rows / underlying table's name
# As a root-like user
connect (root,localhost,root,,test);
connection root;
create database mysqltest1;
create table mysqltest1.t1 (i int);
create table mysqltest1.t2 (j int);
create table mysqltest1.t3 (k int, secret int);
create user alice@localhost;
create user bob@localhost;
create user cecil@localhost;
create user dan@localhost;
create user eugene@localhost;
create user fiona@localhost;
create user greg@localhost;
create user han@localhost;
create user inga@localhost;
create user jamie@localhost;
create user karl@localhost;
create user lena@localhost;
create user mhairi@localhost;
create user noam@localhost;
create user olga@localhost;
create user pjotr@localhost;
create user quintessa@localhost;
grant all privileges on mysqltest1.* to alice@localhost with grant option;
#
--echo ... as alice
connect (test11765687,localhost,alice,,mysqltest1);
connection test11765687;
create view v1 as select * from t1;
create view v2 as select * from v1, t2;
create view v3 as select k from t3;
grant select on mysqltest1.v1 to bob@localhost;
grant show view on mysqltest1.v1 to cecil@localhost;
grant select, show view on mysqltest1.v1 to dan@localhost;
grant select on mysqltest1.t1 to dan@localhost;
grant select on mysqltest1.* to eugene@localhost;
grant select, show view on mysqltest1.v2 to fiona@localhost;
grant select, show view on mysqltest1.v2 to greg@localhost;
grant show view on mysqltest1.v1 to greg@localhost;
grant select(k) on mysqltest1.t3 to han@localhost;
grant select, show view on mysqltest1.v3 to han@localhost;
grant select on mysqltest1.t1 to inga@localhost;
grant select on mysqltest1.t2 to inga@localhost;
grant select on mysqltest1.v1 to inga@localhost;
grant select, show view on mysqltest1.v2 to inga@localhost;
grant select on mysqltest1.t1 to jamie@localhost;
grant select on mysqltest1.t2 to jamie@localhost;
grant show view on mysqltest1.v1 to jamie@localhost;
grant select, show view on mysqltest1.v2 to jamie@localhost;
grant select on mysqltest1.t1 to karl@localhost;
grant select on mysqltest1.t2 to karl@localhost;
grant select, show view on mysqltest1.v1 to karl@localhost;
grant select on mysqltest1.v2 to karl@localhost;
grant select on mysqltest1.t1 to lena@localhost;
grant select on mysqltest1.t2 to lena@localhost;
grant select, show view on mysqltest1.v1 to lena@localhost;
grant show view on mysqltest1.v2 to lena@localhost;
grant select on mysqltest1.t1 to mhairi@localhost;
grant select on mysqltest1.t2 to mhairi@localhost;
grant select, show view on mysqltest1.v1 to mhairi@localhost;
grant select, show view on mysqltest1.v2 to mhairi@localhost;
grant select on mysqltest1.t1 to noam@localhost;
grant select, show view on mysqltest1.v1 to noam@localhost;
grant select, show view on mysqltest1.v2 to noam@localhost;
grant select on mysqltest1.t2 to olga@localhost;
grant select, show view on mysqltest1.v1 to olga@localhost;
grant select, show view on mysqltest1.v2 to olga@localhost;
grant select on mysqltest1.t1 to pjotr@localhost;
grant select on mysqltest1.t2 to pjotr@localhost;
grant select, show view on mysqltest1.v2 to pjotr@localhost;
grant select, show view on mysqltest1.v1 to quintessa@localhost;
disconnect test11765687;
#
--echo ... as bob
connect (test11765687,localhost,bob,,mysqltest1);
connection test11765687;
select * from v1; # Should succeed.
--error ER_VIEW_NO_EXPLAIN
explain select * from v1; # fail, no SHOW_VIEW
disconnect test11765687;
#
--echo ... as cecil
connect (test11765687,localhost,cecil,,mysqltest1);
connection test11765687;
--error ER_TABLEACCESS_DENIED_ERROR
select * from v1; # fail, no SELECT
--error ER_TABLEACCESS_DENIED_ERROR
explain select * from v1; # fail, no SELECT
disconnect test11765687;
#
--echo ... as dan
connect (test11765687,localhost,dan,,mysqltest1);
connection test11765687;
select * from v1; # Should succeed.
explain select * from v1; # Should succeed.
disconnect test11765687;
#
--echo ... as eugene
connect (test11765687,localhost,eugene,,mysqltest1);
connection test11765687;
select * from v1; # Should succeed.
--error ER_VIEW_NO_EXPLAIN
explain select * from v1; # fail, no SHOW_VIEW
disconnect test11765687;
#
--echo ... as fiona
connect (test11765687,localhost,fiona,,mysqltest1);
connection test11765687;
select * from v2; # Should succeed.
show create view v2; # Should succeed, but...
--error ER_TABLEACCESS_DENIED_ERROR
explain select * from t1; # fail, shouldn't see t1!
--error ER_TABLEACCESS_DENIED_ERROR
# err msg must give view name, no table names!!
explain select * from v1; # fail, have no privs on v1!
--error ER_TABLEACCESS_DENIED_ERROR
explain select * from t2; # fail, have no privs on t2!
--error ER_VIEW_NO_EXPLAIN
explain select * from v2; # fail, shouldn't see t2!
disconnect test11765687;
#
--echo ... as greg
connect (test11765687,localhost,greg,,mysqltest1);
connection test11765687;
select * from v2; # Should succeed.
--error ER_TABLEACCESS_DENIED_ERROR
explain select * from v1; # fail; no SELECT on v1!
--error ER_VIEW_NO_EXPLAIN
explain select * from v2; # fail; no SELECT on v1!
disconnect test11765687;
#
--echo ... as han
connect (test11765687,localhost,han,,mysqltest1);
connection test11765687;
--error ER_TABLEACCESS_DENIED_ERROR
select * from t3; # don't have privs on all columns,
--error ER_TABLEACCESS_DENIED_ERROR
explain select * from t3; # so EXPLAIN on "forbidden" columns should fail.
select k from t3; # but we do have SELECT on column k though,
explain select k from t3; # so EXPLAIN just on k should work,
select * from v3; # and so should SELECT on view only using allowed columns
explain select * from v3; # as should the associated EXPLAIN
disconnect test11765687;
#
--echo ... as inga
connect (test11765687,localhost,inga,,mysqltest1);
connection test11765687;
select * from v2;
# has sel/show on v2, sel on t1/t2, only sel v1
# fail: lacks show on v1
--error ER_VIEW_NO_EXPLAIN
explain select * from v2;
disconnect test11765687;
#
--echo ... as jamie
connect (test11765687,localhost,jamie,,mysqltest1);
connection test11765687;
select * from v2;
# has sel/show on v2, sel on t1/t2, only show v1
# fail: lacks sel on v1
--error ER_VIEW_NO_EXPLAIN
explain select * from v2;
disconnect test11765687;
#
--echo ... as karl
connect (test11765687,localhost,karl,,mysqltest1);
connection test11765687;
select * from v2;
# has sel only on v2, sel on t1/t2, sel/show v1
# fail: lacks show on v2
--error ER_VIEW_NO_EXPLAIN
explain select * from v2;
disconnect test11765687;
#
--echo ... as lena
connect (test11765687,localhost,lena,,mysqltest1);
connection test11765687;
--error ER_TABLEACCESS_DENIED_ERROR
select * from v2;
# has show only on v2, sel on t1/t2, sel/show v1
# fail: lacks sel on v2
--error ER_TABLEACCESS_DENIED_ERROR
explain select * from v2;
disconnect test11765687;
#
--echo ... as mhairi
connect (test11765687,localhost,mhairi,,mysqltest1);
connection test11765687;
select * from v2;
# has sel/show on v2, sel on t1/t2, sel/show v1
explain select * from v2;
disconnect test11765687;
#
--echo ... as noam
connect (test11765687,localhost,noam,,mysqltest1);
connection test11765687;
select * from v2;
# has sel/show on v2, sel only on t1, sel/show v1 (no sel on t2!)
--error ER_VIEW_NO_EXPLAIN
explain select * from v2;
disconnect test11765687;
#
--echo ... as olga
connect (test11765687,localhost,olga,,mysqltest1);
connection test11765687;
select * from v2;
# has sel/show on v2, sel only on t2, sel/show v1 (no sel on t1!)
--error ER_VIEW_NO_EXPLAIN
explain select * from v2;
disconnect test11765687;
#
--echo ... as pjotr
connect (test11765687,localhost,pjotr,,mysqltest1);
connection test11765687;
select * from v2;
# has sel/show on v2, sel only on t2, nothing on v1
# fail: lacks show on v1
--error ER_VIEW_NO_EXPLAIN
explain select * from v2;
disconnect test11765687;
#
--echo ... as quintessa
connect (test11765687,localhost,quintessa,,mysqltest1);
connection test11765687;
select * from v1; # Should succeed.
--error ER_VIEW_NO_EXPLAIN
explain select * from v1; # fail: lacks select on t1
disconnect test11765687;
# cleanup
#
--echo ... as root again at last: clean-up time!
connection root;
drop user alice@localhost;
drop user bob@localhost;
drop user cecil@localhost;
drop user dan@localhost;
drop user eugene@localhost;
drop user fiona@localhost;
drop user greg@localhost;
drop user han@localhost;
drop user inga@localhost;
drop user jamie@localhost;
drop user karl@localhost;
drop user lena@localhost;
drop user mhairi@localhost;
drop user noam@localhost;
drop user olga@localhost;
drop user pjotr@localhost;
drop user quintessa@localhost;
drop database mysqltest1;
disconnect root;
connection default;
--echo End of 5.0 tests.
# Wait till we reached the initial number of concurrent sessions
--source include/wait_until_count_sessions.inc
sql/sql_view.cc
View file @ 8932ae21
......@@ -1148,8 +1148,38 @@ bool mysql_make_view(THD *thd, File_parser *parser, TABLE_LIST *table,
if (!table->prelocking_placeholder &&
(old_lex->sql_command == SQLCOM_SELECT && old_lex->describe))
{
if (check_table_access(thd, SELECT_ACL, view_tables, 1) &&
check_table_access(thd, SHOW_VIEW_ACL, table, 1))
/*
The user we run EXPLAIN as (either the connected user who issued
the EXPLAIN statement, or the definer of a SUID stored routine
which contains the EXPLAIN) should have both SHOW_VIEW_ACL and
SELECT_ACL on the view being opened as well as on all underlying
views since EXPLAIN will disclose their structure. This user also
should have SELECT_ACL on all underlying tables of the view since
this EXPLAIN will disclose information about the number of rows in it.
To perform this privilege check we create auxiliary TABLE_LIST object
for the view in order a) to avoid trashing "table->grant" member for
original table list element, which contents can be important at later
stage for column-level privilege checking b) get TABLE_LIST object
with "security_ctx" member set to 0, i.e. forcing check_table_access()
to use active user's security context.
There is no need for creating similar copies of table list elements
for underlying tables since they are just have been constructed and
thus have TABLE_LIST::security_ctx == 0 and fresh TABLE_LIST::grant
member.
Finally at this point making sure we have SHOW_VIEW_ACL on the views
will suffice as we implicitly require SELECT_ACL anyway.
*/
TABLE_LIST view;
bzero((char *)&view, sizeof(TABLE_LIST));
view.db= table->db;
view.table_name= table->table_name;
if (check_table_access(thd, SELECT_ACL, view_tables, 1) ||
check_table_access(thd, SHOW_VIEW_ACL, &view, 1))
{
my_message(ER_VIEW_NO_EXPLAIN, ER(ER_VIEW_NO_EXPLAIN), MYF(0));
goto err;
......
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