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

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260 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
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1answer
1k 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). ...
2
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1answer
301 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
385 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
155 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 ...
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1answer
146 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 ...
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1answer
402 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
1k 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 ...
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3answers
297 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 ...
8
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1answer
848 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
2k 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
1k 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
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 ...
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2answers
1k 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 ...
14
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6answers
10k 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 inclides folder with config and classes. I told my developer to move it away from public folder but he said there is no ...
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2answers
1k 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
188 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
129 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
340 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
2k 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
233 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
563 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 ...
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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 ...
4
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1answer
293 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
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 ...
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3answers
474 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
104 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
108 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
108 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
1k 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 ...
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1answer
241 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
262 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
397 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
894 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 ...
2
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1answer
295 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 ...
6
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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 ...
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3answers
424 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 ...
15
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2answers
3k 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 ...
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1answer
1k 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
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 ...
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3answers
605 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 = ...
0
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1answer
978 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
317 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 ...
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1answer
433 views

Admin area in my php website is vulnerable to sql injection without login [closed]

my website admin area is vulnerable to sql injection . I tried using havji and it hacked successfully to database. But how is this possible. without login it breaked into admin panel. ...
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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
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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 ...
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3answers
339 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 ...
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4answers
591 views

Site constantly getting infected

I am the webmaster of some websites running Typo3, 2 of which are getting infected constantly. These 2 sites are being owned by the same client. Something happens on those 2 sites that causes ...
14
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2answers
733 views

PHP attack string in access logs

So one of the Invision Power Board installations on my server was recently compromised. I found what seemed to be the attack (using PHP in the query string and carefully crafted cookies), and I ...
4
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1answer
173 views

What are possible consequences for applications that depends on Safe Mode for security?

PHP finally removed safe_mode feature: Safe Mode Warning This feature has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 5.4.0. The PHP safe mode is an attempt to solve the ...