HOW TO FIND A VULNERABLE WEBSITES

Website security is a major problem today and should be a priority in any organization or a webmaster, Now a days Hackers are concentrating alot of their efforts to find holes in a web application, If you are a website owner and having a High Page rank and High Traffic then there is a chance that you might be a victim of these Hackers.

Few years back their existed no proper tools search for vulnerability, but now a days there are tons of tools available through which even a newbie can find a vulnerable site and start Hacking

 Common Methods used for Website Hacking

There are lots of methods that can be used to hack a website but most common ones are as follows:


1.SQL Injection
2.XSS(Cross Site Scripting)
3.Remote File Inclusion(RFI)
4.Directory Traversal attack
5.Local File inclusion(LFI)
6.DDOS attack

Tools commonly used to find a vulnerable website

Acunetix

Acunetix is one of my favorite tool to find a venerability in any web application It automatically checks your web applications for SQL Injection, XSS & other web vulnerabilities.

 

Download Acunetix Web Security Scanner
Nessus

Nessus is the best unix venerability testing tool and among the best to run on windows. Key features of this software include Remote and local file securitychecks a client/server architecture with a GTK graphical interface etc.
Download Nessus from the link below
http://www.nessus.org/download
Retina-

Retina is another Vulnerability assessment tool,It scans all the hosts on a network and report on any vulnerabilities found.
Download Retina from the link below http://www.eeye.com/Downloads/Trial-Software/Retina-Network-Security- Scanner.aspx
Metasploit Framework

The Metasploit Framework is the open source penetration testing framework with the world's largest database of public and tested exploits.
Download Metasploit(For Windows users) from the link below
http://www.metasploit.com/releases/framework-3.2.exe
Download Metaspolit(For Linux users) from the link below
http://www.metasploit.com/releases/framework-3.2.tar.gz

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COMMON METHODS TO HACK WEBSITES

Gone are the days when website hacking was a sophisticated art. Today any body can access through the Internet and start hacking your website. All that is needed is doing a search on google with keywords like “how to hack website”, “hack into a website”, “Hacking a website” etc. The following article is not an effort to teach you website hacking, but it has more to do with raising awareness on some common website hacking methods.

The Simple SQL Injection Hack

SQL Injection involves entering SQL code into web forms, eg. login fields, or into the browser address field, to access and manipulate the database behind the site, system or application.
When you enter text in the Username and Password fields of a login screen, the data you input is typically inserted into an SQL command. This command checks the data you've entered against the relevant table in the database. If your input matches table/row data, you're granted access (in the case of a login screen). If not, you're knocked back out.

In its simplest form, this is how the SQL Injection works. It's impossible to explain this without reverting to code for just a moment. Don't worry, it will all be over soon.
Suppose we enter the following string in a User name field:
' OR 1=1
The authorization SQL query that is run by the server, the command which must be satisfied to allow access, will be something along the lines of:
SELECT * FROM users WHERE username = ‘USRTEXT '
AND password = ‘PASSTEXT’
…where USRTEXT and PASSTEXT are what the user enters in the login fields of the web form.
So entering `OR 1=1 — as your username, could result in the following actually being run:
SELECT * FROM users WHERE username = ‘' OR 1=1 — 'AND password = '’
Two things you need to know about this:
['] closes the [user-name] text field.
'' is the SQL convention for Commenting code, and everything after Comment is ignored. So the actual routine now becomes:
SELECT * FROM users WHERE user name = '' OR 1=1
1 is always equal to 1, last time I checked. So the authorization routine is now validated, and we are ushered in the front door to wreck havoc.
Let's hope you got the gist of that, and move briskly on. Brilliant! I'm gonna go hack me a Bank!
Slow down, cowboy. This half-cooked method won't beat the systems they have in place up at Citibank,
evidently

 
But the process does serve to illustrate just what SQL Injection is all about — injecting code to manipulate a routine via a form, or indeed via the URL. In terms of login bypass via Injection, the hoary old ' OR 1=1 is just one option. If a hacker thinks a site is vulnerable, there are cheat-sheets all over the web for login strings which can gain access to weak systems. Here are a couple more common strings which are used to dupe SQL validation routines:
username field examples:

• admin'—
• ') or ('a'='a
• ”) or (“a”=”a
• hi” or “a”=”a

… and so on.


Cross site scripting ( XSS ):
Cross-site scripting or XSS is a threat to a website's security. It is the most common and popular hacking a websiteto gain access information from a user on a website. There are hackers with malicious objectives that utilize this to attack certain websites on the Internet. But mostly good hackers do this to find security holes for websites and help them find solutions. Cross-site scripting is a security loophole on a website that is hard to detect and stop, making the site vulnerable to attacks from malicious hackers. This security threat leaves the site and its users open to identity theft, financial theft and data theft. It would be advantageous for website owners to understand how cross-site scripting works and how it can affect them and their users so they could place the necessary security systems to block cross-site scripting on their website.
Denial of service ( Ddos attack ):

A denial of service attack (DOS) is an attack through which a person can render a system unusable or significantly slow down the system for legitimate users by overloading the resources, so that no one can access it.this is not actually hacking a webite but it is used to take down a website.
If an attacker is unable to gain access to a machine, the attacker most probably will just crash the machine to accomplish a denial of service attack,this one of the most used method for website hacking

Cookie Poisoning:


Well, for a starters i can begin with saying that Cookie Poisoning is alot like SQL Injection

Both have 'OR'1'='1 or maybe '1'='1'

But in cookie poisoning you begin with alerting your cookies

Javascript:alert(document.cookie)

Then you will perharps see "username=JohnDoe" and "password=iloveJaneDoe"

in this case the cookie poisoning could be:

Javascript:void(document.cookie="username='OR'1'='1"); void(document.cookie="password='OR'1'='1");

It is also many versions of this kind... like for example

'

'1'='1'

'OR'1'='1

'OR'1'='1'OR'

and so on...

You may have to try 13 things before you get it completely right...

Password Cracking
Hashed strings can often be deciphered through 'brute forcing'. Bad news, eh? Yes, and particularly if your encrypted passwords/usernames are floating around in an unprotected file somewhere, and some Google hacker comes across it.
You might think that just because your password now looks something like XWE42GH64223JHTF6533H in one of those files, it means that it can't be cracked? Wrong. Tools are freely available which will decipher a certain proportion of hashed and similarly encoded passwords.

A Few Defensive Measures

* If you utilize a web content management system, subscribe to the development blog. Update to new versions soon as possible.
* Update all 3rd party modules as a matter of course — any modules incorporating web forms or enabling member file uploads are a potential threat. Module vulnerabilities can offer access to your full database.
* Harden your Web CMS or publishing platform. For example, if you use WordPress, use this guide as a reference.
* If you have an admin login page for your custom built CMS, why not call it 'Flowers.php' or something, instead of “AdminLogin.php” etc.?
* Enter some confusing data into your login fields like the sample Injection strings shown above, and any else which you think might confuse the server. If you get an unusual error message disclosing server-generated code then this may betray vulnerability.
* Do a few Google hacks on your name and your website. Just in case…
* When in doubt, pull the yellow cable out! It won't do you any good, but hey, it rhymes.

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WEBSITE HACKING WITH DOT NET NUKE EXPLOIT

In this tutorial I will tell you how hackers use a simple dot net nuke exploit to hack a website, Now the exploit I am talking about is found in hundreds and hundreds on DNN applications and it allows the hacker to upload an image on your server, This type of attack is also called one way Hacking and at the end of article I have also posted some countermeasures to help you defend your self against these kinds of attack.

Google Dork

A google dork is an act of using google provided search terms to obtain a specific result and this DNN vulnerability occurs only in those websites which have "/portals/0" in their navigation, So goahead and search for inurl:”/portals/0″ where inurl asks the google to display all the url's who have /portals/0 in their navigation
1.Lets say the vulnerable website is:
 www.vulnerablewebsite.com/portals/0
2.Now we will just add Providers/HtmlEditorProviders/Fck/fcklinkgallery.aspx after the url so www.vulnerablewebsite.com/portals/0 will become www.vulnerablewebsite.com/portals/0Providers/HtmlEditorProviders/Fck/fcklinkgallery.aspx
3.Now a website is vulnerable to this type of attack you will get a similar windows like the below one:

4.Next enter the following Javascript in the address bar:
javascript:__doPostBack(‘ctlURL$cmdUpload’,”)

What this javascript will do is that it will enable us to upload our image to the server:

5.The hacker could upload any image on victims website.
Countermeasures
1.The easiest method is to rename your fcklinkgallery to some thing else but it will not prevent this attack, but you can protect it from script kiddie's in this way, A skilled hacker can easily find the renamed file by using some Footprinting methods
2.Another way to prevent this attack is to upgrade to IIS 7 or higher and a DNN version of 4.9.4 or higher

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LEARN WEBSITE HACKING AND SECURITY WITH DVWA TOOLS

Lots of readers often ask me How can I be good at website hacking and web application security, The thing is that even if you have an idea of how some popular website application attack work but still you need a safe environment to practice what you have learned because you are not allowed to access any website even for testing purposes unless and until you are not authorized to do that, This is where Damn vulnerable web app(DVWA) comes into play
Basically Damn vulnerable web app(DVWA) PHP/MySQL web app which is Damn vulnerable, DVWA web app allows you to learn and practice web application attacks in a safe environment, It's latest version is DVWA 1.7.

Vulnerabilities

• SQL Injection
• XSS (Cross Site Scripting)
• LFI (Local File Inclusion)
• RFI (Remote File Inclusion)
• Command Execution
• Upload Script
• Login Brute Force
• Blind SQL Injection 

And much more.

Official warning

It should come as no shock..but this application is damn vulnerable! Do not upload it to your hosting provider’s public html folder or any working web server as it will be hacked. It’s recommend that you download and install XAMP onto a local machine inside your LAN which is used solely for testing.

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