Web Application Pentesting with Manual SQL Injection – Integer Based

Today we will perform manual SQL injection with an integer-based method for the MySQL database. I hope the last article on error-based string injection is useful to everyone, especially beginners. Now I will quickly drive into yet another writing for SQL injection with the integer-based method.

SQL Injection ONLINE LAB:

Beginners can use this website to practice skills for SQL injection
To Access the LAB Click Here

STEP 1: Breaking the Query

Visiting the website testphp.vulnweb.com/artists.php?artist=1
let us add & check a single quote to the existing URL to check whether the website is vulnerable to SQL Injection by adding testphp.vulnweb.com/artists.php?artist=1′

Here we are trying to break the query to receive error messages with the database so that we can balance the query.
But we are not getting error statements with respect to our input, which means a single quote as input.
Now I understand that when the input string is not getting an error with the database, let me try to fix it without a single quote.

The above figure shows that the website is getting fixed & we have joined the query with no errors with the integer method. So this is called SQL Injection With Integer Based Method.

STEP 2: Finding the Backend Columns

It is time to have a conversation with the database to find the number of columns. To enumerate columns we can use order by command.
Let me ask the database for any number so that I can check the column’s availability in the database.

Above figure, I have asked for 4 columns, but it throws an error.
Keep asking the database, let me ask for 3 columns !!!

The above Figure shows no SQL errors, Yes! we have only 3 columns

STEP 3: Finding the Backend Table & Table Names

Let us ask the database its table path with the command union all select

The above figure shows the execution of the union all select gives the path of tables.2 & 3 the path of the table.

The above figure shows the execution of database() & version() on the path of tables 2 & 3 providing us with the database name and version.
So here the database name is accurate and the version is 5.1.73-0ubuntu0.10.04.1

STEP 4: Dumping Database Tables

Group_concat() is the function that returns a string with the concatenated non-NULL value from a group.
So we can use this Function to list all Tables from the database.
In Addition, we can use Information_Schema to view metadata about the objects within a database

The Above Figure shows the dump of all tables as carts,categ,featured,guestbook,pictures,products,users

STEP 5: Dumping all Data in Columns of Tables

Here I will dump for users in the table

The Above Figure shows the dump of all columns of tables contain uname,pass,cc,address,email,name,phone,cart.

STEP 6: Dumping all Usernames & passwords

Here we can dump all usernames & passwords in the database.

Here we got the username as test and password as test !!!!
practice and try to dump all columns of tables containing cc, address, email, name, phone, cart. Happy Hacking !!!

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BALAGANESH