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

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0
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3answers
207 views

PHP url pen testing [closed]

hello all I am using a sandbox to start practicing security measures. I get given a URL which calls a filename using the url (/download.php?file=files/read_me.txt) ... I know its possible to get the ...
0
votes
0answers
56 views

best operation mode for Rijndael-256 in PHP

so my question is about the operation mode. In another thread I heard that ECB is bad which makes sense when I read about it, so I wanna change some things at my Crypto to make it better and wanted to ...
0
votes
1answer
46 views

Why does the SQL Injection technique INTO OUTFILE sometimes not work? [closed]

Why does the SQL Injection technique INTO OUTFILE sometimes not work? http://example.com/file.php?id=1 union select 1,"<?php system($_REQUEST['cmd'])?>",3,4 INTO OUTFILE " ...
0
votes
2answers
253 views

Getting the uploaded file path without knowing the uploading destination

Imagine a scenario that we are able to upload a PHP file on the server. However, we are not aware of the uploading path. I simply mean that, we are able to upload the file but we don't know where it ...
0
votes
1answer
920 views

PHP mallware attack [duplicate]

I'm desprate because my site has been attacked by some malware that adds code below on every php files. I tried to edit and chmod the infected file but its coming back. Scanning with ClamAV found ...
2
votes
2answers
521 views

If using htmlentities or htmlspecialchars functions is enough for block XSS attack

I know this question was discussed on net various times. and people give some example how to bypass these functions through passing some code. But here one issue, All example of ...
5
votes
2answers
480 views

How to safely display external pictures?

i want to write (and currently writing) a php script to display external images, not hosted on my website. Something like facebook's safe_image. What I'm currently doing is file_get_contents('pic') ...
-1
votes
2answers
152 views

Is SQL injection still possible after filtering?

I am just reviewing a script I want to use for my website. The author filters all user entered data ($_POST and $_GET) with this function: function XSSCheck($value) { return preg_replace( ...
3
votes
1answer
491 views

Correct way to generate password salts in PHP 5.3 on Linux given my constraints?

In examining our database storage of hashed passwords with salts, I note a high rate of salt collisions, i.e., there are far too many cases where two table rows have the same salt stored. One ...
0
votes
2answers
96 views

Standard AES vs additional parameters with Rijndael - what is more secure?

I know that Rijndael and AES are pretty similar and AES is just a subset of Rijndael, and I have read that Rijndael can have 256 bit blocks while AES has "only" 128 bit blocks. The problem is that I ...
4
votes
3answers
251 views

Wordpress infected with Trojan

So recently our (VPS CentOS6.5) server began hosting a WP site that was, or became, infected (via revslider plugin) with some kind of trojan (probably spam sender, as we ended up on Spamhaus list very ...
1
vote
2answers
39 views

form validation [closed]

To what degree of concern should I take when validating a form? What should be the general line to say enough? Currently, I'm checking form token submit value = match internal hard code input name ...
4
votes
1answer
169 views

bypass file_exists[rfi,lfi] in my code, is it posible?

I've got the following piece of code in my web application: $data = "dir/files/".$_GET['f'].".pdf"; Couple of lines down I got: if(file_exists($data)){ include($data); Could an attacker ...
1
vote
2answers
73 views

Securing php files from external include [closed]

Can anybody externally include my php file in their scripts? E.g. I have a file with classes executing code to db, and is it possible that somebody from external environment includes my php file and ...
2
votes
1answer
161 views

Web services API key

I have a PHP server with some .php files. Swift iOS application send POST request to server and get some response in JSON. PHP files on server do some work with MSQL. The question is: How to provide ...
0
votes
1answer
164 views

How do configure Apache to resolve 'Missing Cross-Frame Scripting Defence' by app scan [closed]

There is an apache server hosting some website written in PHP and is accessible thru internet. How do configure the apache to resolve 'Missing Cross-Frame Scripting Defence' and can 'Missing ...
0
votes
2answers
63 views

Test registration form using brute force

I need to test if my website registration form can have problems with brute force attacks, because this form requires an invite code. Is there any tool for this kind of test?
1
vote
3answers
133 views

Where to place PHP files for security?

A simple question, where do you place PHP files on a server? I can't seem to find any good information on this. Obviously public files should be in the document root somewhere/somehow, since they ...
0
votes
1answer
2k views

SQLMAP unable to upload the stager file with 404 error

I can't get to upload the stager file on the OWASPbwa document root (/var/wwww/WackoPicko/users). I am not sure how to troubleshoot this error. Any help on the issue will be appreciated. Thank you. ...
2
votes
0answers
105 views

Obtaining large data sets for research: MySQL, PHP, Apache, etc

I have been looking around the web for large data sets (specifically web related log files - MySQL, PHP, Apache, and so on) that contains data of attempted intrusions/exploits. I am doing some ...
1
vote
2answers
258 views

owasp esapi php implementation for xss attacks

I searched extensively for good materials for prevention of xss attacks using OWASP ESAPI. But could not find any beginner material. I found a blog for basic security but not explicitly for XSS ...
1
vote
1answer
176 views

What is This Script Trying to do [closed]

This Script seems to have been added into my Site Code I want to understand what is it trying to do so I can try to prevent it . <?php /* ===================================================== ...
-2
votes
1answer
65 views

Preventing LFI with user input

I need a script to look for logs which are in separate files for each user so that I can get all the log data. Right now I have something like this: public function getLog($name) { if ...
2
votes
2answers
197 views

PHP code in user session LFI filtered out

Firstly, I make the obligatory disclaimer that everything I am doing here is legitimate and pre-authorized, etc., etc. For those unfamiliar with user session local file inclusion in PHP, there's a ...
21
votes
5answers
4k 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 there. ...
8
votes
6answers
33k 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 ...
3
votes
1answer
247 views

Session Identification Hashing - How to make it more Secure and Robust

I wrote a PHP class which handles Session and store them in DB instead of normal Files in the server, you can find it on My Session Handler Class In that post a user by name @AnotherGuy has raised ...
3
votes
1answer
66 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
1answer
115 views

Reflected XSS via $_FILES

Is it possible to perform a reflected XSS attack via the $_FILES variable? The vulnerable code I am imagining might look like this: echo $_FILES["file"]["name"]; I read that it's not possible to ...
-3
votes
1answer
154 views

{PHP} SQL Injection [duplicate]

Please note: this isn't a duplicate!!! Why? You can use ' but You don't know how :) I have this PHP code: <?php (...) function escape($str) { $ret = ''; for($i=0;@$str[$i];$i++) { ...
3
votes
1answer
118 views

Protect against cgi-bin/php attacks centos

I am facing some strange attack while I was checking Apache logs: OST ...
33
votes
5answers
7k views

How to perform a security audit for a PHP application?

I have a PHP application that I would like to have audited for security. I'm familiar with most of the general security issues, but want to make sure I didn't miss anything. What steps should I take ...
3
votes
2answers
92 views

Concepts of a secure note sharing system

I am trying to design a system that will allow for staff members in our small company to securely share sensitive customer information (text) and see them on a web page alongside less sensitive ...
-2
votes
1answer
75 views

Using a index.php script in my iOS app, what should I do to secure it?

I am really new using web servers and security. I have just written a backend for my iOS app in PHP. It's hosted on a Linode apache server. The index.php us located at http://www.example.com/API/. I'm ...
3
votes
2answers
143 views

What measures must be taken to securely authenticate from web traffic to a WebSocket connection?

Obviously TLS is a must for any and all secure authentication. Please turn your paranoia settings up to 11 for this. Background: (In case people are unfamiliar with the WebSocket (WS) protocol and ...
2
votes
3answers
178 views

How does a hash which contains algorithm to choose can be secure?

I was thinking about creating my own hash+salt function, something like sha1(password + md5(login)), then I read here (part 4) that creating it's own hash+salt function is a bad idea, because if the ...
1
vote
1answer
155 views

What security practices should I keep in mind during development? [closed]

I am beginning to develop apps for Android and iOS that make API calls to a PHP web application that I will be developing. Users will be required to sign up with a username, password, and (optional) ...
0
votes
0answers
92 views

Export detailed reports from Rips Vulnerability Scanner 0.55

I am using RIPS 0.55 to scan for static source code vulnerabilities. Currently when running it at the directory level it just gives the category and the list of files. Is there a way to extract ...
0
votes
1answer
150 views

Securing SQL injection for my PHP files [closed]

I have made a PHP forum. I used PDO, as well as SQLi. When I did a security scan of my website, it found errors, and after a long time of trying different stuff, I can't fix them. Points to whomever ...
1
vote
2answers
344 views

Token-based authentication - what's a good token length?

What's a good token character length for a token-based login? Currently I'm using the following code: <?php $token = bin2hex(openssl_random_pseudo_bytes(16)); Is 16 sufficient or should ...
1
vote
0answers
49 views

Is there anything to worry about — worth putting security on a simple test site?

So I want to make a site, this site won't have users (so no one but me will be able to post to the site) or anything it will just echo out items from Mysql like title and text-body I was wondering if ...
-5
votes
2answers
131 views

How do i make a phone number authetication system for my website? [closed]

I really need to prevent users from create multiple accounts. So I was thinking about making a phone number authentication system. Where when a user signs up, a 4 digit code is sent to their phone, ...
1
vote
2answers
107 views

If I write an nmap job into crontab from PHP code to run background, how can I get the status of the nmap cronjob?

I am trying to write a php code test to write an nmap scan (with parameters) scheduled into crontab file. While the nmap is running I would like to get the status of that specific nmap scan. For ...
1
vote
1answer
111 views

Is this data encryption process secure?

I have created the following encryption process which I will be using to store CD keys inside my database. Before I use it, however, I need to make sure that this is as secure as possible. From what ...
2
votes
2answers
5k views

Proxy / VPN Quality Check / Detection

Is there any way to build a script which detects or rates proxies like Maxmind's proxy detection software? I have already tried to use this code, but it doesn't detect all proxies, in fact it detect ...
3
votes
3answers
304 views

How dangerous are outdated PHP versions for my clients?

In the company where I work (webhosting) our custoumers can choose the PHP version they want to use for their website. However, I have just realized that all of the offered PHP versions are outdated ...
1
vote
0answers
40 views

Folder Access restriction in Shared Hosting

In shared hosting (where I don't have access to httpd.conf files) I want PHP files in "MyTargetFolder" to not have ability to access anything in upper directories. It needs some configuration like ...
2
votes
2answers
130 views

What are the dangers of sql injection with php?

I made an SQL-injectable web-app build to with PHP to get a better understanding of what is going on and automated it all with sqlmap. The relevant code is the following: mysqli_query($conn, SELECT ...
0
votes
3answers
437 views

Is it possible to get Network Domain from Client with PHP or Apache? [closed]

I'm working on a solution to identify client Network Domain or Workgroup in a private network. Based on it, I must change some access permissions. I can't do that through IP address because it isn't ...
1
vote
1answer
73 views

There was a potential harmful file on my server, What damage has it done? [closed]

I received an abuse complaint for my server from hosting provider. After a thorough search I found file with name "title.php" in a WordPress installation's upload directory. I am curious to know what ...