Security aspects concerning code written in the programming language PHP which is often used for web applications.

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0
votes
2answers
127 views

Is my hashing function good enough

Is there an obvious flaw with this hashing function (written in PHP)? function hash($password) { sleep(1); // Make hashing slow $hash = ""; $iterations = strlen($password); for ( $i = 0; $i ...
1
vote
2answers
180 views

session security in php

This has been asked a bunch of times. I am just curious to see if the below code provides a fairly significant level of security. Are there any other cases I should consider? Below is just an ...
2
votes
2answers
582 views

Is it possible to exploit a file upload with whitelist and filename hashing?

I have a small web application. Because it is necessary to upload some files I check the file extensions with a whitelist (tgz, jpg, png, pdf, zip, rar, txt, gif, py, c, rb). In addition to that, I ...
-2
votes
1answer
242 views

What are common problems that reveal PHP code? [closed]

What is the best method for securing PHP scripts that contain database passwords? From what I've read, PHP can be revealed when an error occurs and is not caught. Is there any way to reveal PHP by ...
44
votes
6answers
6k views

Should I be concerned if my website throws stack information?

I have a simple login form on my web page and the URL looks like this: example.com/signup/signup.php?q=1 If I try something like this: example.com/signup/signup.php?q=1&() I'm redirected to ...
2
votes
2answers
132 views

After trying successful SQL injection why the result isn't getting displayed on the webpage?

Below is the PHP code I wrote that allows SQL injection with one parameter ie 'id' in this case. On trying SQL injection via putting this 2' ORDER BY 1;--' in the parameter (id field ), I get ...
21
votes
5answers
3k views

Should I use Suhosin for PHP?

Suhosin can be used to increase the security of your php application. I can really see the use of it when you are using shared hosts, with multiple (possibly evil) people running their PHP apps ...
4
votes
2answers
4k views

Should I use urandom() or openssl_random_pseudo_bytes()?

I am developing a site in PHP 5.4. Which function is better to use to generate a random salt for password security? $salt = sha1(openssl_random_pseudo_bytes(23)); or $seed = ''; $a = ...
1
vote
2answers
112 views

XSS via REQUEST_URI

Is there any situation where an XSS attack can be performed via the PHP $_SERVER['REQUEST_URI'] variable? For those unfamiliar with it: It contains the complete URL used to access that website, ...
1
vote
0answers
24 views

Security issues IIS 7.5 with PHP 5.3 [duplicate]

We are facing alot of weird php files all over our WordPress websites on our IIS 7.5 server. The file look like XSS script and maybe that php code that the hacker use to send spam emails or something ...
2
votes
2answers
172 views

Hack: anymonous URL on my Joomla Website[Resolve] [closed]

My website has been hacked again. There are many foreign URLs such as here. I've checked the database and there is nothing strange in my database. Does anyone know what kind of hack attack is like ...
2
votes
2answers
257 views

What is a current best practice example of basic encryption and decryption in PHP?

I have a good working knowledge of basic security best practices (password hashing, preventing sql injection, CSRF, etc.) but am completely at a loss for finding a solution to common-case encryption ...
18
votes
1answer
504 views

How to encrypt in PHP, properly?

How do I encrypt data in PHP, properly, using symmetric-key encryption? I have a message M and a secret S. I'm looking for a solution that uses cryptography properly without making any of the usual ...
1
vote
1answer
132 views

Security issue with form action $_SERVER['PHP_SELF']

I read that there is a potential securty issue with forms like this (action $_SERVER['PHP_SELF']) <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post"> <input ...
0
votes
1answer
862 views

How can I detect whether a webshell exploit has been run?

My forum was running MyBB 1.6.10 and maldet found a JPG file with the webshell by Orb malware code at the end (php.cmdshell.unclassed.352). I'm using nginx and had secured against arbitrary files ...
4
votes
3answers
205 views

Demonstrating SQL injection

I want to do a demo for a login page that is vulnerable to SQL injection for training purposes. I already tried to build one using PHP and MySQL. I commented the code sanitation to make the page ...
0
votes
1answer
77 views

Is enough to remove “..” from strings to avoid directory traversal attack?

Lets say I want to build a simple PHP script that let me access files inside a folder: $path = $_GET['path']; $path = str_replace('..', '', $path); $path = "./static/" . $path; readfile($path); Is ...
-2
votes
1answer
128 views

Possible Injection to PHP PDO

Expert says that PDO is one of secure scripting from mysql injection. I have read the manual about it and do some little research. And here, I'm trying to get ID value from URL paramater, as in: ...
-3
votes
1answer
56 views

Creating blacklist on login page [closed]

I am working on how to secure login page from tautology attack. Can anybody help me on how to create blackist of SQL keywords in php ?
1
vote
1answer
351 views

What does this PHP injected-code do?

I've just found out that all of my websites on one of my server has been hacked. Some seemingly malicous code was injected into all index.php files: /*EngineWork*/ if(!defined("FDSJERIUI234FSDF")){ ...
1
vote
0answers
43 views

IIS | Block execution of files in directory

I am dealing with user uploads via a PHP application. I want to secure the server so no exploits are available to the user, such as uploading a php shell and executing it. I have set it so all ...
0
votes
1answer
61 views

PHP and other files on the server, their visibility and access [closed]

Let's say I would like to protect my PHP files that are on the public server and are used as a part of the website. Does anyone can easily access these files just like HTML/JS/CSS files through ...
10
votes
4answers
1k views

What is Net-Worm.PHP.Mongiko trying to do?

I found several lines of this request in my web server access log: Source IP Dest IP Request Stat User agent 217.172.190.19 ...
0
votes
1answer
88 views

php- is my code secured enough to protect from remote command execution when using shell_exec()?

I am using shell_exec function on the following variables to execute commands on the shell: fname (characters only) fpack(characters only) email (a valid email address) My code is: <?php ...
7
votes
3answers
661 views

Finding security consultant for doing in-depth code review?

We have a PHP application that we know has poor coding practices (because the developers did not have a good understanding of PHP / programming fundamentals). This could lead to the scenario where we ...
1
vote
1answer
366 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"]); ...
2
votes
0answers
26 views

Understanding how openx cache was infected

I have a system that uses openx for serving banners. I have recently noticed that several cache file in /var/cache contain infected code. The code contains sql queries that create several php files in ...
-2
votes
2answers
127 views

Password hashing and blowfish [duplicate]

What I'm about to say is probably going to make me look like an idiot but it's better to be wrong and learn than have unanswered questions. Ever since I started dealing with passwords I wondered what ...
4
votes
3answers
183 views

PHP | Security for allowing user uploads

My Sittuation: I am creating a web application with PHP which allows users to scan their files for viruses. It allows the user to upload their files via the html "file" input type or via a URL. I ...
1
vote
1answer
64 views

How much access to the file system does the recent Drupal vulnerability give?

A friends drupal site was hacked. What is strange is that the root directory of the installation at the hosting company (let us call it rootdir) was copied (or renamed) rootdir_hacked and the ...
1
vote
2answers
120 views

How to test the php vulnerability CVE-2014-3515

How to test if I'm vulnerable regarding CVE-2014-3515? My vendor supplied me with a patch and verified that it installed however I would like to verify that I am no longer vulnerable. My vendor ...
1
vote
0answers
41 views

Unidentified contents injected in include file [closed]

This code was injected into a "include" file on my server. http://pastebin.com/Eueu8unY Any file that included this gave a 301 Moved Permanently error. I wish to know: Is this due to an insecure ...
2
votes
1answer
107 views

Using INTO OUTFILE with INSERT

I have some free time so I'm testing various local vulnerable machines. In one particular lab machine, you first have to gain administration panel, and then use the available "insert" command and ...
2
votes
1answer
107 views

How does this wordpress XSS work?

There is a new Wordpress exploit in wp-includes/formatting.php $textarr = preg_split('/(<.*>|\[.*\])/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE); General problem here is that they try to parse ...
2
votes
2answers
218 views

Why does this CSRF vulnerability work?

Recently Laravel 4 was updated to address a security concern: there was a CSRF vulnerability in their code. Here's the old code: if (Session::token() != Input::get('_token')) { throw new ...
3
votes
1answer
192 views

Root server hacked via httpd - consequences and future prevention

Since before mid 2014, my root server was targeted by hackers and recently they gained limited access. I disabled all services once I realized the server has been compromised and started ...
0
votes
2answers
74 views

PHP Plugin Security

I've been working on a Home Automation system now for a little more than a year and I've added a plugin system to it. I've also added so others can submit their plugins and if I accept them then ...
0
votes
0answers
303 views

Codeigniter RESTful web api creation for mobile and web applications general guidelines

I'm having application with running good in codeigniter, mysql and jquery. Currently we are planning to evaluate our web application with mobile application. So we planned to develop web application, ...
7
votes
1answer
169 views

What is the name for this type of URL attack?

Say a PHP page accepts URL path as a POST parameter (like the answer to this question): $path = $_POST['url_path']; file_get_contents('http://example.com' . $path); A maliicious user POSTs ...
2
votes
2answers
656 views

Preventing SQL Injections

So I'm pretty new to SQL so I'm not too familiar with how to prevent any SQL injections. I have 1 main form that's being used as a poll and it currently only has 1 text field. At the moment I think ...
0
votes
3answers
975 views

htaccess - protect php file execution in specific directory

How can I protect php execution in specific upload directory? Mostly, people put .htaccess in upload folder to protect php execution. But someone says it can be replaced by attackers. So how can I ...
1
vote
2answers
164 views

SQL Injection Issue Multi-line query

I am currently doing a SQL Injection attack against a website in school(that the tech created) sadly I can't point anyone to the site in question, the teacher has allowed us to gain knowledge as ...
0
votes
3answers
981 views

Prevent a server side script from a direct URL access

There is a server side script written in php(say backend_file.php) or coldfusion(say backend_file.cfm). Lets say, i am using Apache and I have a sample web folder (on my Localhost) like: ...
-1
votes
1answer
72 views

Is there a way to bypass the inbuilt php functions for sqlinjection

If there is a way to bypass the built-in functions of PHP to protect against SQL injection or I should rely on some other filters rather than depending on built-in functions?
0
votes
0answers
28 views

Improve the security of a website implementing the least privilege principle [duplicate]

I am a beginner and I am trying to program a secure website to improve my skills and knowledge. I am under Linux and I am using LAMP with php. My website is similar to a social network so people will ...
19
votes
8answers
2k views

PHP malware/shell keeps resurrecting [duplicate]

So I've been fighting this problem for months now and decided that it's beyond my limited (if at all) server skills, and that I need help from the pros. I have a VPS (with root access) which hosts ...
0
votes
0answers
110 views

Improve the security of a website implementing the least privilege principle

I am a beginner and I am trying to program a secure website to improve my skills and knowledge. I am under Linux and I am using LAMP with php. My website is similar to a social network so people will ...
2
votes
0answers
58 views

Offering a privacy scenario with PHP mcrypt library

first of all, sorry if my question is not clear, because English is not my first language. Anyway, let-me explain the concept I'm struggling to solve as the best solution. I have some guys, and they ...
1
vote
2answers
248 views

How To Patch LFI Vulnerability

I'm pretty sure that you all are aware of this vulnerability, but i wonder how to patch this? I have seen this code in a tutorial that it is the way to patch this but still user can access all the ...
1
vote
1answer
103 views

How to use mySQL UNION operator in sql injection, with injectable password paramiter?

Can someone give me an example of sql injection with UNION operator, that returns users and passwords, with regards to the bellow php example. I've managed to inject simple 1 or 1=1... in the pass ...