Security aspects concerning code written in the programming language PHP which is often used for web applications.
-2
votes
0answers
48 views
Safe application hosting using LAMP [closed]
I have a Ubuntu Server with PHP, MySql/Postgres configured on it. I have a Symfony2 application, which looks something like this:
Symfony/
app/ (php app files)
src/ (php app files)
vendor/ ...
2
votes
0answers
52 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 ...
0
votes
1answer
42 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 ...
0
votes
2answers
52 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 ...
0
votes
2answers
212 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 ...
1
vote
1answer
98 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
vote
1answer
127 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).
...
1
vote
1answer
67 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 ...
6
votes
1answer
99 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 ...
-1
votes
2answers
72 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
votes
1answer
78 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 ...
4
votes
1answer
116 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 ...
6
votes
2answers
199 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 ...
-3
votes
0answers
41 views
DB filesystem encryption [closed]
This is very common question everyone has but important. Is there any best tool which encrypts filesystem? Here my requirement is even if we log in to db we should see encrypted data only. It should ...
-2
votes
0answers
28 views
Security - php file permissions on shared hosting [duplicate]
What file permissions should i set for a php website's files and folders running on a shared hosting plan on an apache server?
When I run <?php echo exec('whoami'); ?> it gives me a ...
2
votes
1answer
55 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 ...
7
votes
1answer
137 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 ...
5
votes
5answers
568 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 ...
3
votes
2answers
98 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 ...
-1
votes
1answer
61 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 ...
-4
votes
0answers
126 views
Prevent Malware attack on my site [closed]
I built a wordpress site for a client. After some days, client reported that the site has been blocked by Google for Malware content. When I reviewed the site, I found some changes in the code like ...
18
votes
3answers
3k views
How does “check.torproject.org.” know if you're using TOR?
I'm looking at the results from the following URL and would like to know how does the TOR website "know" that TOR is being used or not.
...
5
votes
4answers
394 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 ...
5
votes
2answers
409 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 ...
13
votes
6answers
1k 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 ...
5
votes
3answers
299 views
How dangerous is it to use CSS styles from an untrusted source?
I'm a moderator at a forum. We want to have a new style for the forum.
We're thinking about announcing a competition to the users to come up with the best CSS design; we would adopt the best ...
1
vote
2answers
63 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:// ...
2
votes
2answers
142 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 ...
3
votes
1answer
78 views
PHP - Serializing user inputs
My entropy gathering system works by serializing user inputs:
$entropy=sha1(microtime().$pepper.$_SERVER['REMOTE_ADDR'].$_SERVER['REMOTE_PORT'].
...
6
votes
1answer
227 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:
...
6
votes
3answers
814 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 ...
5
votes
3answers
396 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 ...
-2
votes
6answers
946 views
Use PHP to check uploaded image file for malware?
I want my users to be able to upload a photo. Currently I am not checking the uploaded photo for problems of any kind, although I do limit the size to 32k.
Is there any way for me to check uploaded ...
3
votes
2answers
93 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 ...
3
votes
1answer
199 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 ...
1
vote
2answers
99 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 ...
2
votes
3answers
182 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'])) {
...
2
votes
1answer
89 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
votes
1answer
88 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" . $anotherUnsafeVariable);
Is there a smooth way ...
2
votes
1answer
130 views
When checking a session variable to see if a user is logged in, is it enough to check to see if the variable is set?
When displaying a page with content only logged in users should see, I simply check
if(isset($_SESSION['hasLoggedIn']))
{
//show content
}
else
{
echo 'you must log in';
}
In this article it ...
14
votes
4answers
477 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 ...
1
vote
1answer
89 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 ...
1
vote
2answers
132 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 ...
2
votes
3answers
134 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
votes
1answer
210 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
...
4
votes
3answers
903 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 ...
3
votes
3answers
207 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 ...
13
votes
1answer
576 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 ...
15
votes
4answers
3k views
How to hijack a session?
Despite the blatant title of the question, this is actually for a genuine purpose.
My site uses PHP code like this:
$select="select id from tableA where user_id='".$_SESSION['sess_user_id']."'";
...
0
votes
1answer
297 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 ...
