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I have a UTF-8 (utf8mb4) mysql database.
For some reasons, I'd like to use utf8 encoded strings in my queries.
For instance, instead of using this query
Update mail_table set mail = 'john#foo.com'
I'd like to use:
Update mail_table set mail = SomeMySQLFunction('\x6A\x6F\x68\x6E\x40\x66\x6F\x6F\x2E\x63\x6F\x6D')
How may i do this? Cast? Convert?
Thanks.
Regards.
Use UNHEX() function.
UPDATE mail_table
SET mail = UNHEX('6A6F686E40666F6F2E636F6D')
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I want to copy MySQL database while replacing some vulnerable data(e/g. email, phone, name, etc/) How can I efficiently achieve this?
The steps
dump your database
import your database
obfuscate values in your copy
remove your old dump
dump your second database
do whatever you need with the dump of the copy
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My lua codes for mysql
Getting these error
as the error message says, yellowpages_posts.realUser uses collation utf8mb4_unicode_ci and users.identifier uses utf8mb_general_ci.
you have to explicitly set the collation of one to the other, e.g.
yellowpages_posts.realUser = users.identifier COLLATE utf8mb4_unicode_ci
also checkout https://dev.mysql.com/doc/refman/8.0/en/cast-functions.html
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I have few tables in MySQL and I wanted to delete data in those MySQL tables from SQL Server. Do we have any approach to perform it?
You can perform Insert/Update/ Delete/ Select using Linked Server in the SQL Server. You just need to create MySQL LinkedServer and use Open Query.
Sample Query:
DELETE FROM OPENQUERY([MYSQL_LOCAL], 'SELECT user_id FROM d_portal.users' ) where user_id = 1;
MYSQL_LOCAL is a MySQL Linked Server.
You can follow the below Article for better guidance.
https://www.sqlshack.com/mysql-query-t-sql-tutorial-for-sql-server/
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If the database used by a server is something other than MySQL, say Mongo DB, then is it possible to execute SQL queries? In such cases how can we perform SQL injection?
I don't expect all the possible commands, but some basic commands if the app is using, say MongoDB.
Yes. This type of attack is possible with any data source which parses queries. In the case of MongoDB, the queries are written in JavaScript instead of SQL but if you build your query like this:
String query = "db.users.find({ age: " + request.getParameter("age") + " });"
then you open the database to similar kinds of attacks.
This is nosql injection, and it is possible.
https://www.owasp.org/index.php/Testing_for_NoSQL_injection
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Is there a SQL query that returns the schema of the current database? Like with columns "table", "name", "type", etc.
The platforms in question are MySQL, PostgreSQL, SQLite, and T-SQL.
The real RDBMS should all support an INFORMATION_SCHEMA set of views and tables. I think SQLite has its own take on things, but then it's a SQL library rather than a full RDBMS.
If you stick to the ANSI standard stuff your queries should be portable enough, but obviously you won't get details of the various platform-specfic features.
For MySQL, try SHOW TABLES; and DESCRIBE table_name;
For more info, check out http://dev.mysql.com/doc/refman/5.0/en/getting-information.html