1
vote
0answers
53 views

Failed to connect to netcat reverse shell

I am doing an exercise of PentesterLab, I've got a webshell called 1.pdf, and it can be included in index.php as a PHP file. It contains code like this: %PDF-1.4 <?php echo system($_GET["cmd"]); ...
1
vote
2answers
99 views

WordPress Private Expoit? [closed]

I have a friend who said he has a private exploit for all WordPress ran websites. I asked him to take down my private blog, to see if it is real. He couldn't do it. I tried to get some more ...
2
votes
4answers
279 views

Malicious code in image. Harmful?

In my website, a user can upload his profile picture. After analysis of some pictures, I have found some pictures with malicious PHP code, just like the upload script. As an example, I have found a ...
0
votes
1answer
131 views

Have I done enough not be compromised through image uploading

I know that you can never be sure that you have done enough to be secure, and I also know that file uploading is hard to make correct. Before asking this question I read some of the related posts here ...
0
votes
0answers
34 views

Storing hashed or encrypted password in session? [duplicate]

I need users to be able to encrypt and decrypt without entering their passwords every time. One way is to store the hashed password in session, and use it for encryption and decryption. Problem with ...
0
votes
1answer
73 views

False Positives- Server side protection against XSS

I read about XSS attacks and its prevention mechanism on server-side. It seems only protection is to sanitize the input by escaping special characters on server side (Using some PHP functions such as ...
0
votes
1answer
102 views

XSS attack vector without forward slash?

is there an XSS attack vector that allows the inclusion of a external .js file without having to use forward slashes? let's say the path of the file is somewebsite.com/js/xss.js Is there a way to ...
0
votes
1answer
69 views

Removing Unnecessary Services & Packages in a MySQL Ubuntu 12.04 Server [closed]

As part of hardening a MySQL 5.6 server running on Ubuntu 12.04 LTS, unnecessary services and packages will have to be removed. For a server that is serving only as a MySQL server, what services and ...
1
vote
2answers
114 views

Is Temporary XSS a Problem?

I use a site on a regular basis so I wanted to make sure it was secure. One of the things I checked was that when I changed my first name to <img src="http://blah.blah/blah/blah.notanextension" ...
0
votes
1answer
67 views

Possible ways of exploiting PHP register_globals [closed]

I have a PHP script that executes a bunch of commands to verify that a user is logged. if (( isset ($password) && $password!="" && auth($password,$hidden_password)==1) || ...
2
votes
2answers
334 views

Unrestricted File Upload - Possible exploits

During a penetration test‎ (exercise) on a IIS web server + MYSQL DBMS, I have found an Unrestricted File Upload vulnerability for which I can upload a .php file. So I have tried to upload a php ...
0
votes
1answer
97 views

File-structure when using token

I'm using a form-token to secure the validation process of my php-file. Basically the structure of the php-file looks like this: if ($_POST) {//form has been submitted? if (validateFormToken) { ...
2
votes
1answer
116 views

Submit form with token

I have a token that I want to use to prevent direct access of some php-files. Some of these php-files are loaded via AJAX. The token is used with a session to secure form submission AND to prevent ...
3
votes
3answers
422 views

Tokenless REST API security concerns

I'm designing an API in PHP/MySQL that, by its design, will not store a user's password in the database and thus does not generate authorization tokens for the client to hold. The reason for this is ...
5
votes
1answer
252 views

Web Applications terminate strings on null-byte

I have just been doing some penetration testing on a site, and I have noticed (and I have noticed before but now seems like a good point to bring it up) that putting a null byte in the search string ...
1
vote
1answer
176 views

PHP gethostbyname security implications

I'm working on a PHP application. There is a requirement to find IP's by hostname and i have to resort to gethostbynamel for that. Looks like there is no other way. I was wondering if there are any ...
1
vote
1answer
242 views

If my website does not take any user input, is there any danger in showing my code and folder structure?

First time posting here; apologies for any mistakes I've made, please edit, retag, migrate as appropriate. I have a simple homepage whose purpose is (essentially) to contain my contact info and some ...
-4
votes
3answers
262 views

PHP web application security [closed]

I am building a PHP web application, that needs enhanced security, due to the fact that it contains very sensitive information (in a database). I think that I want to use self-signed SSL ...
8
votes
4answers
636 views

How dangerous is it to store password in plain text on sites like GitHub?

I have a few private repositories set up on GitHub for some of the projects I am working on for my company. These applications connect to databases and I have database authentication credentials ...
0
votes
1answer
258 views

Site Hacked - Where to go from here? [closed]

Our magento based e-commerce site was hacked over the weekend, the hackers managed to gain access to the magento files and embed some scrambled code into the get.php file in the root directory. I ...
-1
votes
1answer
76 views

Security comparisons between two approaches: how to distinguish FUD from Substance? [closed]

Background: WorkerB and Tymac were discussing the pros-and-cons of using two different alternatives for extending a web content management system that is used in their company. Alternative one ...
8
votes
3answers
9k views

Is there any SQL injection for this PHP login example?

I want to write a login form, and I got one example from the web. I want to know, if there is any SQL injection for this code? If there is, what could the exploit's web form entry look like? This is ...
1
vote
2answers
132 views

secure certain data on my webserver

I've developed a website where people add their sensitive data. Not credit cards, but lets say they share things about themselves which are private and it wouldn't be good if other people see that ...
6
votes
3answers
4k views

Is it possible to execute a php script in an image file? [duplicate]

I have an image upload php website. Users can upload images to my website. A user claims he can hack my website using an uploaded image. I opened all the images that he uploaded to my server with ...
0
votes
2answers
157 views

how to find injected code in SQL

Recently one of my sites is hacked. The hacker used SQL injection to compromise the security. After getting SQL access he injected code in many places in database. I cleaned up many of them. But I am ...
0
votes
1answer
939 views

ASP.net vs PHP security? [closed]

I have been told that generally speaking, asp.net web apps tend to be more secure than php, since asp.net has some automatic security measures, for example, by default it doesn't allow remote file ...
11
votes
4answers
2k views

Is $_SERVER[ ] a safe source of data in PHP?

Can I 100% rely on $_SERVER[] to be a safe source of data that I do not need to sanitized like I do $_GET[] and $_POST[]? Thanks. OVERVIEW OF RESPONSES: So it seems there is a consensus that some ...
2
votes
4answers
355 views

When logging out of a website is anything else required then destroying the session?

In PHP, I'm not sure if I should start the session before destroying it when a user wants to log out. session_start(); session_destroy(); Is there anything else that needs to be done? EDIT: I ...
3
votes
3answers
336 views

is it safe to allow external images to be attached to Blog or any Web content?

I am filtering all images that attached to any content of my blog: Check for file extension. Check content type using $finfo = finfo_open(FILEINFO_MIME_TYPE); I also save the image temporary on my ...
2
votes
2answers
491 views

how to bypass “header” in php

While reading an article I encounter an interesting thing I did not know about: if(!isset($_SESSION['usr_id']) || !isset($_SESSION['usr_name'])) { header('Location: index.php'); } ...Which ...
4
votes
1answer
474 views

CodeIgniter CSRF confusion

I have been working with CodeIgniter for about 3 weeks and am very well on the way to loving this framework. However I have been looking at the core code of the framework and I was reading over the ...
-1
votes
1answer
129 views

setting up website for logged in users, anyone, and files no one should see (via the web) [closed]

I asked how to prevent not logged in users from seeing certain content but the solution I chose to implement encountered a problem. I chose to make my root directory for the server C:\WAMP\www\public ...
4
votes
5answers
8k views

Playing with Referrer Header

There are 2 sites: http://www.site1.com http://www.site2.com http://www.site1.com contains link to http://www.site2.com as <a href="http://www.site2.com/">link<a/> When user clicks ...
0
votes
2answers
191 views

Is this code vulnerable?

I have developed a php code given below. I would like to know what are the security vulnerabilities present within this php code? <?php if(isset($_SESSION['id'])){ // get data ...
1
vote
1answer
127 views

Client vs Server security for business critical application (crossplatform)

We have the option to develop a software either based on Java (but then it is only available for desktop clients using Java SE and can run maybe also as tomcat app can be multithreaded, stable, ...
0
votes
2answers
252 views

How to restrict web access to certain countries

What are the better ways of filtering access to the web application based on Geographical location. Is it possible with a network layer firewall or we need an application layer?
0
votes
1answer
251 views

Protect database resources from fake data inputs via web forms

Scenario: I'm working on a project that needs to accept large amounts of data (customer data) from its users. So it can be normal to have a user trying to add 10,000 or 100,000 records at a time. In ...
2
votes
1answer
190 views

Is it safe to invoke PHP GD functions if you don't know whether file is a valid image?

There is image upload function in web application. After image is uploaded, it's resized using functions from PHP GD like imagecopyresampled and others. Before invocation of PHP GD's functions there ...
1
vote
1answer
198 views

Is it possibel to inject php code to roundcube errors log file via LFI vulnerability? [closed]

i tried to inject php code to roundcube errors log file, with no success. i think there is something filtering injected php code.
5
votes
4answers
948 views

Protecting against CSRF when a form is being submitted via an AJAX call

I'm using anti-CSRF tokens on all my forms to prevent CSRF attacks. Also, the tokens are being saved in the $_COOKIE variable to validate against the value I get from the form. I'm resetting the token ...
8
votes
6answers
3k views

Why is php not used for banking sites or for a banking transaction?

Other programming languages popular on the web, such as Java and .NET, are used for banking sites. However, I've rarely (if ever) seen a PHP application designed to be deployed for a banking site. ...
5
votes
3answers
10k views

How can I use this path bypass/exploit Local File Inclusion?

I have tried to run a vulnerability scanning script (Uniscan 6.0) on some websites and then I found a site which is exploitable with this following path. (included a word "invalid" , params/website ...
7
votes
2answers
1k views

PHP - How to do safe input filtering in the light of multibyte encoding vulnerabilities?

For days now I try to get my head round how to write a secure web application in php, and it turns out to be particularly difficult. The more I read, the more I sink in deep swamps full of ...
3
votes
2answers
1k views

sanitizing input/output in php/codeigniter

I've been making some progress learning about web application security. Right now I'm trying to finalize my strategy for sanitizing input and output. Background: Users can submit reviews to the site, ...
6
votes
2answers
368 views

Security issues with PHP Sandbox

I am working on a PHP sandbox for a Web Application Honeypot. The PHP sandbox will analyze a PHP file that may have been injected as part of an RFI attack. It should run the file in a safe environment ...
2
votes
4answers
1k views

Without using SSL, what's the most secure way to make an AJAX request to a PHP page?

It was suggested over at stackoverflow that I try my question here. This is it verbatim: So, it's impossible to do AJAX requests securely without using SSL. I get it. You can either view-source the ...
2
votes
3answers
254 views

Securing dropdown boxes

I have been creating selection boxes for years, yet I never knew you could modified it with firebug and submit them with nonpermitted values, of course this wouldn't happened if the code was secured. ...
4
votes
4answers
671 views

Database Security Best Practices for E-Commerce Site [duplicate]

Possible Duplicate: Securing an E-commerce site I'm developing an e-commerce site in a LAMP environment. Is it advisable to separate data on to different servers (i.e. to have one server as ...
5
votes
1answer
428 views

question for pentesters: PHP proc_open() in safe_mode

Can anybody explain to me how proc_open() is affected when PHP is running in safe_mode? As far as i have noticed, the command to execute is appended to a '/' - is there anything else and is it ...
1
vote
1answer
1k views

How can log poisoning be successful with a Local File Inclusion attack?

I just read a paper about Local File Inclusion on exploit-db.com, it can be found here. One technique with LFI is log poisoning as you may know already. You do an HTTP GET request that contains PHP ...