Posted on 3 Comments

SQL Injection with Sqlmap : Step by step guide

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. 

Posted on 21 Comments

SQL injection with Havij : Step by step guide

NOTE : This is strictly for educative purposes.

Havij is an automated SQL injection tool. To say in the own words of its creators,

” Havij is an automated SQL Injection tool that helps penetration testers to find and exploit SQL Injection vulnerabilities on a web page. It can take advantage of a vulnerable web application. By using this software, user can perform back-end database fingerprinting, retrieve DBMS login names and password hashes, dump tables and columns, fetch data from the database, execute SQL statements against the server, and even access the underlying file system and execute operating system shell commands. ”

It is available both in free and commercial versions. Today we are going to see how to dump the contents of a database using Havij. For this I am going to use the free version. First download Havij from here and install it. Then open it and enter the vulnerable page url in the target column ( for this tut I am using my own vulnerable webpage ).

Set the database option to ‘auto detect‘ and hit analyze. This should show you the current database name as shown below.

Click on the “info” tab. This will show you information about the victim’s system. We can see information like Host IP address, web server version etc.

Click on the “Tables” tab.

Click on “Get DBs” option. This will list all the databases as shown below.

To get tables in a specific database, select the database and click on Get Tables”. This will list all the tables present in the selected database. I selected database “shunya” here.

We can see that there is on table ‘users’ in our database ‘shunya’ .To get columns , select the table ‘ users’ and click on “Get Columns”.

This will list all the columns in the table. We can see that we have five columns in the table ‘users’.all the columns. It’s time to dump the values of columns. Select the columns whose data we want to dump and click on Get data”. Here I selected all the columns.

We got all the data including usernames and passwords. But passwords seem to be encrypted. No problem. Click on the password hashes and copy them. Then click on MD5″ tab and paste the password. Click on “Start”. Havij automatically decrypts the password for us. Decrypt all passwords in the similar manner.

Click on “Find admin”. This option finds the admin  page of the website automatically. When it finds the admin page, you can try the username and passwords to get access to the website. Hope this was helpful.

Here’s a video version of this howto.