Saturday, June 02, 2012

Basic Website Hacking Tutorial for beginners

Note: I believe you have some basic knowledge of HTML and PHP :)
Intended for educational purpose only...

SQL Injection

SQL injection is the act of injection your own, custom-crafted SQL commands into a

web-script so that you can manipulate the database any way you want. Some example usages of

SQL injection: Bypass login verification, add new admin account, lift passwords, lift

credit-card details, etc.; you can access anything that’s in the database.

Example Vulnerable Code – login.php (PHP/MySQL)
Here’s an example of a vulnerable login code
PHP Code:

$user = $_POST['u'];
$pass = $_POST['p'];

if (!isset($user) || !isset($pass)) {
echo(“<form method=post>

} else {
$sql = “SELECT `IP` FROM `users` WHERE `username`=’$user’ AND `password`=’$pass’”;
$ret = mysql_query($sql);
$ret = mysql_fetch_array($ret);
if ($ret[0] != “”) {
echo(“Welcome, $user.”);
} else {
echo(“Incorrect login details.”);

Basically what this code does, is take the username and password input, and takes the

users’s IP from the database in order to check the validity of the username/password combo.

Testing Inputs For Vulnerability
Just throw an “‘” into the inputs, and see if it outputs an error; if so, it’s probably

injectable. If it doesn’t display anything, it might be injectable, and if it is, you will

be dealing with blind SQL injection which anyone can tell you is no fun. Else, it’s not


The Example Exploit
Let’s say we know the admin’s username is Administrator and we want into his account. Since

the code doesn’t filter our input, we can insert anything we want into the statement, and

just let ourselves in. To do this, we would simply put “Administrator” in the username box,

and “‘ OR 1=1–” into the password box; the resulting SQL query to be run against the

database would be “SELECT `IP` FROM `users` WHERE `username`=’Administrator’ AND

`password=” OR 1=1–’”. Because of the “OR 1=1″, it will have the ability to ignore the

password requirement, because as we all know, the logic of “OR” only requires one question

to result in true for it to succeed, and since 1 always equals 1, it works; the “–” is the

‘comment out’ character for SQL which means it ignores everything after it, otherwise the

last “‘” would ruin the syntax, and just cause the query to fail.

XSS (Cross-Site Scripting)
This vulnerability allows for an attacker’s input to be sent to unsuspecting victims. The

primary usage for this vulnerability is cookie stealing; if an attacker steals your cookie,

they can log into whatever site they stole your cookie from under your account (usually,

and assuming you were logged in at the time.)

Example Vulnerable Code – search.php (PHP)
PHP Code:

$s = $_GET['search'];
// a real search engine would do some database stuff here
echo(“You searched for $s. There were no results found”);

Testing Inputs For Vulnerability
For this, we test by throwing some HTML into the search engine, such as “<font

color=red>XSS</font>”. If the site is vulnerable to XSS, you will see something like this:

XSS, else, it’s not vulnerable.

Example Exploit Code (Redirect)
Because we’re mean, we want to redirect the victim to goatse (don’t look that up if you

don’t know what it is) by tricking them into clicking on a link pointed to

“search.php?search=// “. This will output “You searched for // . There were no results

found” (HTML) and assuming the target’s browser supports JS (JavaScript) which all modern

browsers do unless the setting is turned off, it will redirect them to abc.

RFI/LFI (Remote/Local File Include)
This vulnerability allows the user to include a remote or local file, and have it parsed

and executed on the local server.

Example Vulnerable Code – index.php (PHP)
PHP Code:
$page = $_GET['p'];
if (isset($page)) {
} else {

Testing Inputs For Vulnerability
Try visiting “index.php?p=”; if you see Google, it is vulnerable to

RFI and consequently LFI. If you don’t it’s not vulnerable to RFI, but still may be

vulnerable to LFI. Assuming the server is running *nix, try viewing

“index.php?p=/etc/passwd”; if you see the passwd file, it’s vulnerable to LFI; else, it’s

not vulnerable to RFI or LFI.

Example Exploit
Let’s say the target is vulnerable to RFI and we upload the following PHP code to our

PHP Code:
system(“echo Hacked > index.php”);
and then we view “index.php?p=” then our malicious code

will be run on their server, and by doing so, their site will simply say ‘Hacked’ now.


Anonymous said...

Very Informative..

Anonymous said...


Anonymous said...

Woah! I'm really loving the template/theme of this blog. It's simple, yet
effective. A lot of times it's difficult to get that "perfect balance" between user friendliness and visual appearance. I must say you have done a fantastic job with this. Additionally, the blog loads super fast for me on Chrome. Outstanding Blog!

My weblog :: forgot twitter password

Anonymous said...

You have brought up a very excellent points , thanks for the

my webpage: aimbots

Anonymous said...

Most of his songs are happily themed, a definite plus for any
exercise-motivating soundtrack. Besides rock, Hebden throws in elements from rap music,
jazz, as well as house music. Although Detroit is far
more famous for exporting cars rather than music, the vast array of
techno music genres we listen to today are variants on the original style of Detroit

Also visit my web blog: daft punk random access memories flac free download

Anonymous said...

, Is Muscle Maximizer a sham or does it sincerely work.

To find out if it is actually true and to understand better if Kyle Leon's system is generally for you or not, let's look into a few of the benefits
and drawbacks of the product. Whenever upgrades became
ready you'll fully grasp this totally free no matter what quantity of money cost to establish them.

Look into my web-site - Somanabolic Muscle Maximizer Results

Anonymous said...

In addition, The Muscle Maximizer comes with a complete 9 week workout
program for you to follow so you now have everything you need to get started right away and achieve the level
of fitness you''. Many people wish to increase their lean muscle mass
and create your toned, developed body that is not
only aesthetically attractive, but strong and healthy additionally.

this program developer, Kyle Leon, is a well-known personal trainer and nutrition expert in recent years and is regarded as
one of the most respected coaches in the world when it comes
to building muscle mass naturally.

Here is my blog post; muscle maximizer results

Post a Comment

Design by Secure Hackers