Hi Friends. Today we will see how to perform SQL injection with sqlmap. Sqlmap is an “open source penetration testing tool that automates the process of detecting and exploiting SQL injection flaws and taking over of database servers “. It is pre-installed in Kali Linux. For this tutorial I am using Vulnerawa as target and it is necessary to setup a webapp pentest lab with it. See how to set up a webapp pentest lab.
If the webapp pentest lab is all ready. Open the browser in Kali linux and type the address as shown below.( the ip address may differ for you ). You should see the Vulnerawa web page as shown below. Click on “About”.
The below webpage will open. It shows about the founders of Vulnerawa.
Click on “founder 1”. It will show brief details about him as shown below.
Similarly go back and click on “Founder 2” and “Founder 3”. The result will be as below. Now if you have observed, the “id” parameter in the URL changes as we click on different users. For founder 1, it is 1 and sequentially.
Now introduce a single quote( ‘ ) character in the URL. after the number as shown below.
Click on “Enter” and the page will show an error as shown below. “You have an error as shown below……..”. This is a clear sign that the webpage is vulnerable to SQL injection.
Now open SQLmap from the path as shown below.
Now copy the vulnerable url and type the following command the terminal. Here -u stands for url.
The result will be as shown below. It will reveal the website technology and the scripting language used.
Now let’s grab the banner of the website. Type the following command and hit “Enter”.
You can see the banner as shown below.
To see the current user of the website, type the following command.
The current user can be seen as below.
Now let us see the current database used by the website. Type the following command.
We can see that the current database is “Vulneraw”.
Now let us see all the tables present in the database “Vulneraw” by using following command.
We see that we have only one table in the current database. The table is “users”.
Now lets see the number of columns in the table “users”. Type the following command.
We see there are four columns in table “users”.
Now let’s dump the values of two columns username and password by typing the following command.
The result is as below. we got the username and passwords.
If we want to dump all the entries of the table, type the following command.
Here are the entries.
Now let’s see if we are lucky enough to get the shell of the target. Shell is the target machine’s command line or terminal. Type the following command.
It will prompt us to enter the application language being used by the website. We already know it is PHP. Enter its value. Next it will prompt you to enter the writable directory. You cam choose your option wisely. I chose the default root directory for Wamp server. Hit on “Enter”.
I successfully got the os-shell. Now let’s try some commands. Type “dir” to see the contents of the root directory. It works as shown below.
Let’s see how many users are there on the system. Type the command “net user” . We can see the users listed as below. Happy hacking practice.
To find sites vulnerable to this sql injection use google dork “site:.com inurl:id=1” or similar dorks. That’s all in this tutorial. See how sql injection works.