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

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7
votes
2answers
395 views

Are my session settings secure enough?

I'm developing a file hosting and sharing web application. Are the following PHP session settings secure enough? ini_set('session.cookie_httponly', 1); ini_set('session.cookie_lifetime', 0); ...
9
votes
6answers
5k views

Why is php not used for banking sites or for a banking transaction?

Other programming languages popular on the web, such as Java and .NET, are used for banking sites. However, I've rarely (if ever) seen a PHP application designed to be deployed for a banking site. ...
0
votes
1answer
347 views

Php Session ID, http VS https [duplicate]

So I was doing some tests with the php session ID cookie. I know that data is stored on the server however, a cookie with a unique ID is stored so that the server can recognize the client while ...
10
votes
3answers
691 views

How to deobfuscate this PHP malware?

Two days ago a file called "images.php" appeared on a friend's server, which he noticed because it caused errors. The file contained the following. This code is of unknown origin and presumed to be ...
0
votes
1answer
213 views

Email Spoofing Modified Headers

I have be reading more and more about email spoofing and was curious how some things are done. I know in PHP you can simply do mail() and then include "From: spoofsender@provider.com" for example, ...
6
votes
1answer
166 views

How important is a mysql password for localhost?

We can assume that if an attacker gained access to a web server running mysql that they would be capable of reading the scripts to determine the mysql password. If mysql only responds on localhost, ...
19
votes
4answers
7k views

How did Anonymous use UTF-16 ASCII to fool PHP escaping?

A few months ago, Anonymous took down a child pornography site using SQL-injection. I read in this article that Anonymous claimed that "the server was using hardened PHP with escaping," but they were ...
5
votes
3answers
1k views

How to access directories disallowed in robots.txt?

While scanning my website with uniscan it found my robots.txt file which disallows access to /cgi-bin/ and other directories, but they are not accessible in browser. Is there a way to access the ...
0
votes
1answer
101 views

Dangers of PHP uploading word docs into a quarantine

I plan to write a PHP script which will allow web users to upload MS Word formatted docs. Here are the precautions I am taking: Filenames will be created by me (something like YYYY-MM-DD.doc) Files ...
2
votes
1answer
2k views

Authenticating Users from Android with PHP Webservice

I'm creating a simple Android application which requires reading and writing values to the cloud. I intent to use PHP for the webservice. But I'm a little confused over the authentication scheme. I ...
0
votes
3answers
3k views

How to filter POST requests before they reach PHP on Apache?

I have done URL filtering with .htaccess (using learning and generator), however I am still concerned that any POST request can be submitted to the PHP even there is only one POST form on the website, ...
34
votes
6answers
4k views

PHP files browsable: is this a vulnerability?

I have a friend who has a website developed in PHP on which we can browse all his files one after one (of course, we can not read the content of the PHP files). Do you think this is a security hole ? ...
3
votes
3answers
288 views

Is web app safe in not public folder?

I'am wondering if it's really safe to use this structure of my web application. WEBAPP Application Controllers Models Views ... Framework ... ...
6
votes
3answers
4k views

Does mysql_escape_string have any security vulnerabilities if all tables using Latin1 encoding?

I have heard that the PHP function mysql_escape_string has security vulnerabilities related to mult-byte characters. Are there any vulnerabilities if all tables are using Latin1 encoding?
30
votes
6answers
3k views

Should I obscure database primary keys (IDs) in application front end?

I'm working on an application which allows a moderator to edit information of user. So, at the moment, I have URL's like http://www.example.com/user/1/edit http://www.example.com/user/2/edit I'm a ...
4
votes
2answers
840 views

Does bcrypt compare the hashes in “length-constant” time?

I saw this function slowEquals() while reading Salted Password Hashing - Doing it Right, which uses a byte-level xor comparison to avoid timing attacks. I was wondering whether this is what Bcrypt ...
1
vote
2answers
431 views

Sql injection is not working on my site?

I have set up a page and database so I can practice SQL injection. Ive tried some examples and it doesn't seem to work. It seems to add the username and password to that database, even though I input ...
3
votes
2answers
110 views

How can you detect an insecure, non-random token?

I know that some of PHP's random functions are insecure due to them not being completely random and are considered a bad practice. My question is how an attacker go about finding that the developer ...
7
votes
1answer
1k views

Does Heartbleed affect servers if OpenSSL was only used to generate the certificate?

I built an application that generates certificate signing requests (CSRs) using the PHP OpenSSL module. Is there a way that the HeartBleed bug can affect these (in use) private keys and CSRs that ...
4
votes
2answers
2k views

How do crackers upload php scripts to Wordpress' wp-content directory?

I've seen a site that has been attacked by uploading php scripts (presumably some sort of shell, or code that loads a shell) to Wordpress' wp-content/uploads directory. Usually this directory is used ...
2
votes
4answers
3k views

SQL Injection with pass MD5

I want to know, if in my login form there is any SQL injection possible. If there is, what could the exploit's web form entry look like? I send username and password by html form (POST). The login ...
8
votes
3answers
13k 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 ...
1
vote
1answer
172 views

PHP and max_input_vars configuration

I am looking into php's max_input_vars setting How many input variables may be accepted (limit is applied to $_GET, $_POST and $_COOKIE superglobal separately). Use of this directive mitigates ...
4
votes
1answer
493 views

Do PHP frameworks such as Zend, symfony and CakePHP provide default protection against cross site scripting?

ASP.NET MVC provides default protection against cross site scripting. Just wondering, if PHP frameworks do the same?
1
vote
2answers
172 views

Protecting the remote database against tampering in a mobile app

This is the first time I face a mobile app deployment at big scale. This app needs to connect to a remote server where to store and retrieve data. I discarded connecting directly to the MySQL ...
1
vote
0answers
517 views

Do I keep my PHP simple auth session secure enough?

I'm experimenting with security, cryptography and web applications. My aim is to create simple login system that is realy secure enough. I'd like to share my approach to keep authenticated session ...
0
votes
1answer
161 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 ...
1
vote
1answer
152 views

WordPress Private Expoit? [closed]

I have a friend who said he has a private exploit for all WordPress ran websites. I asked him to take down my private blog, to see if it is real. He couldn't do it. I tried to get some more ...
2
votes
4answers
2k views

Malicious code in image. Harmful?

In my website, a user can upload his profile picture. After analysis of some pictures, I have found some pictures with malicious PHP code, just like the upload script. As an example, I have found a ...
-1
votes
1answer
83 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 if's i should consider? this is just an example, ...
-1
votes
1answer
101 views

Secure a string in PHP [closed]

What do you think it's the best method to secure a string in PHP? I speak of hiding its content and avoid malicious changes by the user, but be able to recover the information. We can use the ...
1
vote
4answers
222 views

What needs to be focused on when hardening a LAMP stack? [closed]

I have a site running on a VPS. I set up the LAMP stack and a few other programs personally. This is only the second time I have set up a VPS and I am a bit worried about security. Are there things ...
2
votes
3answers
3k 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 ...
0
votes
1answer
708 views

Is it safe to store the reset password token in php session

I have a login system created in PHP. It currently doesn't have the Forgot Password ? feature and I would like to implement the feature. For this I'm planning to do the following : When user ...
1
vote
3answers
1k views

Email activation string with MD5'd random number and email secure?

For the registration on my PHP powered website, I require email confirmation. After a user registers, a string is generated with the following code and sent to their email address. $key = ...
2
votes
1answer
237 views

php crypt - trailing dollar sign - extract only the salt part from hash - padding the salt

I am reading up on PHP's crypt() function. I have a few questions on it - What is the significance of the trailing '$' sign at the end of the salt string that I see in most examples. The manual ...
1
vote
1answer
238 views

IIS 7.5 WebDav Security Issues with Students

Hello Currently I am setting up a server for college students (this includes tech-savy IT students as well) and I will be using IIS 7.5 with Webdav for the students to access their files from home. ...
-1
votes
1answer
951 views

MCRYPT_RIJNDAEL_256 max key allow? [closed]

maximun key for MCRYPT_RIJNDAEL_256 ? mcrypt_encrypt( MCRYPT_RIJNDAEL_256, <<==hash_hmac using sha512==>>, $text, MCRYPT_MODE_ECB, $iv ) Warning: mcrypt_encrypt(): Size of key is too large for ...
1
vote
0answers
1k views

blueimp jQuery-File-Upload getting PHP Hacked

I really like this upload package and want to use it, but from the time I set it up on my server, I've been hacked twice by something called the AnonGhost virus (anonghost.com). I tracked the ...
-6
votes
4answers
229 views

user authentication my method (reinventing the wheel) is this secure?

I have read many articles advising to use OpenID, including Stack Overflow Q&A, for authentication. Unfortunately I can't use openid because my auth is not based on an email id - it is based on ...
6
votes
1answer
7k views

Server attack attempts, what are they trying to achieve?

Recently, I have got a few 404 errors where the user has requested PHP pages. The URLs are range around the cgi-bin and php versions, eg, /cgi-bin/php4. There is also some query string as part of ...
3
votes
1answer
180 views

How can I store information securely when I can't use crypt or a hash?

I'm creating an application for Google Glass (technically it's Glassware, but whatever). The user will do the following steps when going through setup for the Glassware: Go to my website, redirected ...
0
votes
3answers
260 views

Secure uploading file

I have file uploaded system in my php project. What I make at uploading: 1) Check file extension and file mime type. 2) If extension and mime type are allowed types, I save file outside of ...
1
vote
1answer
250 views

Have I done enough not be compromised through image uploading

I know that you can never be sure that you have done enough to be secure, and I also know that file uploading is hard to make correct. Before asking this question I read some of the related posts here ...
0
votes
0answers
40 views

Storing hashed or encrypted password in session? [duplicate]

I need users to be able to encrypt and decrypt without entering their passwords every time. One way is to store the hashed password in session, and use it for encryption and decryption. Problem with ...
1
vote
2answers
972 views

Possible attack on website

I am a developer and I therefor I have very little knowledge on security. So I need some help understanding the attack on website which we launched recently for one of our client. Website is built on ...
1
vote
3answers
121 views

What are some good ways to prevent a malicious visitor from maxing out our customer's API maximum allowed service calls?

We run an API service. We gave our customer a package for max limit of 12000 API calls / day. He reported to us that a user has been on purposely visiting his web page 12,000 times a day in order to ...
0
votes
1answer
237 views

False Positives- Server side protection against XSS

I read about XSS attacks and its prevention mechanism on server-side. It seems only protection is to sanitize the input by escaping special characters on server side (Using some PHP functions such as ...
0
votes
0answers
21 views
-1
votes
1answer
74 views

login not working using hash_pbkdf2 [closed]

i am storing the password using hash_pbkdf2 but now ive hit on a problem my code : 1.for register $salt = openssl_random_pseudo_bytes(125);//salt $final_pass = ...