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

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Encrypt-function inside PHP code that you have to publish

If you write a PHP application, where you have to deliver the compiled code to the customer, how could you include a functionality to send encrypted data from that application to others, and include ...
2
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1answer
469 views

Are GET, POST and windows.location vulnerable to XSS in a Wordpress theme?

I created a Wordpress theme for my client. He told me that he scanned my theme with a vulnerability scanner, and that it has security issues with the GET and windows.location methods. Is this really ...
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3answers
6k views

How secure is ionCube compiled code?

I use ionCube to keep the code I write concealed for my customers. If I would store a password inside the code and compile (not encrypt) it with ionCube encoder, would it be possible for a potential ...
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1answer
973 views

Cross-site request forgery attack. How can we stopped this? [closed]

On one of our websites, we are seeing this code is adding itself. I tried to figured out but no success. One thing I have noticed when I removed the html, head and body starting tags, it's gone. Our ...
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0answers
952 views

Where to store sensitive client details (MYSQL DB credentials) [duplicate]

I have a security related question about storing some client information - specifically their database login credentials. My app works based on the client and so the database details need to be set ...
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2answers
756 views

How to implement shamir's secret sharing algorithm using AES_ENCYRPT

I am using MySQL AES_ENCRYTP() and AES_DECRYPT() to store sensitive details in a database, and currently storing the key in a php file outside of the web root with read access only. The key file looks ...
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2answers
1k views

Generating session CSRF token based on SSL session ID

Following situation: Application is only accessible via HTTPS/SPDY nginx is sending the SSL session ID to the upstream server Upon session start I'd like to use the first 128 characters of that ...
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1answer
502 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 ...
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1answer
6k views

WordPress Hacked - Found a suspicious “class-wp-style-table.php” [closed]

I recently had all of my WordPress accounts on my server hacked. The only suspicious files I found are listed below. These were the only files edited in the last 5 days (June 3, to be specific). ...
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1answer
1k views

Bot detection ideas [php]

I am looking for bot detection ideas. I don't mind bots crawling my site, that's cool, the problem is when they start posting stuff. I recently had to erase 400 accounts because of a bad boy like ...
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1answer
771 views

Is enabling PHP script execution on HTML document file extensions a security concern?

I am working on a very old and messy site, which doesn't have a CMS, or a database. However, it has a lot of .htm and .php files. I need to add some PHP code to some of the .htm files, but want to ...
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2answers
192 views

my websites got infected with a malware i cannot get any info on [closed]

we have a server, on which we host about 30 sites. these are test sites for our customers. most of them are not even indexed by google. some run on php, some on nodejs, some on ruby. all of them that ...
4
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1answer
250 views

Is it possible for users to insert forbidden characters into sites with htmlentities or mysqlescapestring?

So, in my brief research in PHP security, I have been guided toward two important functions to remove forbidden characters from forms. One being "htmlentities" and the other being ...
5
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1answer
957 views

Malicious script analysis

Could somebody tell me what can this malicious code do? I see that in the beginning it turns off the error reporting and logging. Then something with get post method and files stuff. But I am not ...
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2answers
6k views

Exploiting PHP via GET params

To be clear, this is in the interest of ethical testing to secure an application on behalf of my work. Now that that's out of the way, here are the details: Un-sanitised GET params are used in a ...
4
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3answers
469 views

Understanding JVM zero day in relationship with other runtimes

I am a .net and php developer and since java has been in the news recently thanks to the string of zero days, I decided to brush up on security. In regards to the java zero days, this question has ...
9
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2answers
2k views

“Official statement” on php.net : CRYPT_BLOWFISH is strongest hash algorithm. Why?

First: I asked this question on stackoverflow and was kindly asked to post this here again. See the original question here. According to the [early] doc pages of the new PHP 5.5 password ...
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5answers
5k views

How to make a site vulnerable to SQLi?

I've recently taken an interest in SQL injections - it (for some reason, correct me if I'm wrong) seemed like a good place to start (I am pretty much a beginner). Anyways, I want to make a site that I ...
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2answers
3k views

Secure way to establish PHP database connections

I've read the advice (example: store them in php file in a location inaccessible as a URL) but can't help thinking there must be a better way of storing/accessing database credentials. Ideally it ...
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1answer
94 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 ...
7
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2answers
3k views

Is this Data Encryption/Storage Method Secure?

Let me first say that I know it is a bad idea to store sensitive information in a mysql database, so please don't respond by saying "DON'T DO IT" or something to that effect. I am building a website ...
22
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6answers
48k views

Is it possible for a hacker to download a php file without executing it first?

I have a php website where everything is in the public_html\ folder, including an includes folder with config and classes. I told my developer to move it away from public folder but he said there is ...
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2answers
3k views

Stopping js malware injection on our Wordpress site

This had been added to our wordpress site, specifically in the footer.php. hxxp://pkktjuchlrv.peguards.cc/02b31ac5iq/get.js It is malware as defined by google, i belive it is tracking code. We have ...
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2answers
255 views

Are these two ways safe?

I have two scenarios and want to know if each is secure or which risk there are. Number One: If the User has the edit Link (edit/[md5hash]) he can edit a post. The editkey (the hash) is in an form ...
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1answer
182 views

PHP - Serializing user inputs

My entropy gathering system works by serializing user inputs: $entropy=sha1(microtime().$pepper.$_SERVER['REMOTE_ADDR'].$_SERVER['REMOTE_PORT']. ...
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1answer
654 views

Does HTTPS Encrypt PHP Arguments?

I am working on a web app that will need to have a secret key(s) passed from one server to another - I'll need to do this over PHP. Consider the following URL: ...
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4answers
5k views

A customers site had a big mysql injection attack on it, just want to learn from it

I created an online store for a friend of mine. I created a system that shoots me an email any time there is a database error, that way if it is a bug in my code I can identify it and fix it. The ...
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2answers
433 views

Remote File Injection in ARGS blocking form updating database

I am getting a page forbidden because mod_security blocks it with Remote File Injection in ARGS rule. How do I stop this apart from not including URLs in the form fields or removing the http:// ...
5
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3answers
690 views

How do I make SQL injection harder but not impossible?

I'm doing a CTF application for my final year project. I wanted to craft a SQL injection flag but I don't wish that they can simply found out the SQLi vulnerability by injecting ' . Hence, is there ...
9
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3answers
23k 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 ...
4
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1answer
404 views

Exploited by newbie3viLc063s

My debian server got exploited by some scriptiekiddie who used Newbie3viLc063 http://pastebin.com/jma8JRG1 . Scriptkiddie uploaded logo_php.png to my server (My permissions sucked :s) and he did run ...
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2answers
168 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 ...
4
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3answers
965 views

Secure login system - using sessions?

I'm looking for a secure way to let users login on my website. Currently, I've always used a session system, like this: <?php session_start(); if (validPass() || isset($_SESSION['userId'])) { ...
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2answers
148 views

User privileges for unsanatized code

We all know there are still vulnerable code out there even though they may or may not get exploited and found for hacking attempts. I've seen people do it countless times and have a possibly plausible ...
2
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1answer
120 views

Securely store two values per user in SQL

I have come across the need in my web app to store two values for each user. These values would need to be retrievable from a value stored in a URL. I would prefer to store neither of the values in ...
2
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1answer
122 views

Mark parts of strings as unsafe?

Is there a smooth way to mark unsafe parts of a string? i.e. for use in SQL. example in php: someFunction("safe text" . $unsafeVariable . "safe text" . $anotherUnsafeVariable); Is there a smooth way ...
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4answers
3k views

What are the security threats of zip file uploads and what preventive actions should be taken?

We have a Drupal application developed for sharing files. We are allowing zip files to be uploaded by logged in departmental user. We are using Drupal private file system (outside webroot). We are ...
2
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1answer
514 views

XSS MySQL Database Accessible?

I'd like to know if there is any danger of someone being able to access the database via XSS vulnerabilities on this page. I have the following link. When you go to this link, the text I've enclosed ...
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2answers
601 views

How to stop a (malicious) endless loop

Few days ago someone tried to crack my site using a Remote File Inclusion attack. The attack was blocked by my Web Application Firewall, but I was curious about the file. So I downloaded it started to ...
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3answers
569 views

MySQL database access prevention

I am doing a PHP website for a client who deals with third party financial information, and he is concerned about the developmers (me) having access to all the information, which is obviously a valid ...
2
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1answer
2k views

ALERT - ASCII-NUL chars not allowed within request variables

In a Drupal site, I get this error in my Debian's syslog: suhosin[9413]: ALERT - ASCII-NUL chars not allowed within request variables - dropped variable 'name' (attacker 'x.x.x.x', file ...
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1answer
1k views

When checking a session variable to see if a user is logged in, is it enough to check to see if the variable is set?

When displaying a page with content only logged in users should see, I simply check if(isset($_SESSION['hasLoggedIn'])) { //show content } else { echo 'you must log in'; } In this article it ...
12
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3answers
19k 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 ...
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3answers
697 views

Stop code injections into page code

I started a topic HERE on the stackoverflow site, but was refered here. I did get some info there, but think it need's more indepth input. So hopefuly people here can help. I have a few domains ...
22
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2answers
15k views

Risks of a php image upload form

So I have a client wants a photography site where users can upload their photos in response to photography competitions. Though technically this isn't a problem, I want to know the risks associated ...
2
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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 ...
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2answers
211 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 ...
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3answers
1k views

Setting a limit on password recovery attempts

in a setting where one has forgotten their password, I'd like to be able to limit the attempts of entering in email addresses to something like 10. My first thought was to use a cookie. $attempts = ...
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1answer
3k 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 ...
0
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1answer
551 views

Is it secure to use a custom written Php extension for handling + hashing (db) keys?

I'm designing the security of a new application and try to figure out what the best way is to store the keys of the mysql AES encryption in the file system. I've seen several options like store it ...