14 Oct
2014
14 Oct
'14
7:35 p.m.
On Tue, Oct 14, 2014 at 7:33 PM, Madhura Jayaratne <madhura.cj(a)gmail.com>
wrote:
--
Regards,
Chirayu Chiripal
https://chirayuchiripal.wordpress.com/
On Tue, Oct 14, 2014 at 6:27 PM, Chirayu Chiripal <
chirayu.chiripal(a)gmail.com> wrote:
Yeah, sorry. My bad. But in that case, We need to check for
SCHEMA_PRIVILEGES as well now (at least for CREATE USER privileges).
On Tue, Oct 14, 2014 at 6:10 PM, Chirayu Chiripal <
chirayu.chiripal(a)gmail.com> wrote:
Thanks. This seems to be true. If I remove INSERT global privilege from
the user he no longer can create a new user (He was already
lacking CREATE_USER privileges)
Hi all,
On Tue, Oct 14, 2014 at 2:04 PM, Madhura Jayaratne <madhura.cj(a)gmail.com
I just saw my previous research (for some RFE in which this task was
done). Actually, the user needs either of global CREATE_USER or INSERT
privileges on mysql table (So he can still create user w/o having global
create user).
wrote:
Hi all,
Following queries are used to assess whether the logged in user has
super, create user and grant privileges respectively. See [1]
SELECT 1 FROM mysql.user LIMIT 1
This is used to see if user is phpMyAdmin superuser and for phpMyAdmin,
the super user is the user having read access to `mysql.user`.
SELECT 1 FROM INFORMATION_SCHEMA.USER_PRIVILEGES
WHERE PRIVILEGE_TYPE =
'CREATE USER' LIMIT 1
SELECT 1 FROM INFORMATION_SCHEMA.USER_PRIVILEGES WHERE IS_GRANTABLE =
'YES' LIMIT 1
However, if I create a user with all global privileges except for
'GRANT', 'SUPER', and 'CREATE USER' privileges all the above
queries return
1 since the queries does not check for the grantee column. Rows
corresponding to root user make all these queries return 1.
Similarly, USER_PRIVILEGES tells about the global privileges of current
logged in user. Even if user is not having Global GRANT privilege he can
still grant privileges to user (those privileges which he has), So, he is
kind of a GRANT user for phpmyadmin.
I don't know why, but I created a similar user that you have created but
using that new user can still create more users using that new user.
So each of the queries looks fine to me.
I'm not too sure. The issue is these queries lacking a WHERE GRANTEE =
<current user> clause.
Also, If I am not wrong, GRANTEE is the user from
which he got those
particular privileges and is not the current user itself.
If this is true a freshly created use would not have an entry in the
USER_PRIVILEGES table (since the new user has not granted anything), but
this is not the case.
--
Thanks and Regards,
Madhura Jayaratne
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