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

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4answers
1k views

What security features should a PHP framework have?

What security features would you find useful or expect from a PHP framework? I have a PHP framework that I've developed that I'm going to be releasing as an open source project, but I want to make ...
4
votes
2answers
2k views

Are PHP Sessions based on cookies or a cookie-IP pair?

I have a PHP website and my question is: If someone manages to steal my users' cookies via an XSS attack, is it enough for him to be identified as the user? Or does his IP also have to be the same as ...
10
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2answers
4k views

How to address XSS security issues in FCKeditor / CKeditor?

A security report we conducted through an outside company reported XSS vulnerabilities in FCKeditor which we're using in our PHP application. They pointed out that accessing URLs such as: ...
4
votes
1answer
877 views

Which encryption algo should be best for an Android application [duplicate]

Possible Duplicate: Which type of encryption algorithms android supports, and which would be better? I am confused about to use of DES. Triple DES, RSA and AES algorithms, I think I ...
4
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2answers
6k views

Can DES-based hashed password be recovered if salt is known?

Can a hashed password be recovered if the hashing is done with DES based crypt function in PHP and both the hash and salt are known by the attacker? Consider the following example: $salt = 'mysalt'; ...
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vote
2answers
201 views

TCrypto - Comments about design decisions I made?

I have pushed some code to GitHub to demonstrate the usage of symmetric key encryption in PHP. It is a small key-value storage library and it (optionally) offers ability to encrypt the stored ...
10
votes
6answers
3k views

Security review: “HTTP header user-agent has been set to (something)”

We got a security review done of our PHP code and they team advised this in their report (amongst other things): /appdir/ Details The HTTP header user-agent has been set to \" . Request GET ...
9
votes
2answers
1k views

Securing my web-server / website [closed]

Does anyone know of a comprehensive security guide about important basics / fundamentals which should be done to secure a web-server / website? A web link would do.
11
votes
1answer
459 views

Public XSLT & XML playground (with PHP DOMDocument, etc.) Security Risks?

Let's say I want to set up a sandbox or playground in PHP that users can use to create (or paste in) XML and XSLT, then transform the XML via the XSLT (by means of PHP 5's DOMDocument and related ...
4
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2answers
541 views

Attack vectors in POSTing variables from one php script to the next?

I have an application which is structured in the following way for its signup page. After this signup, the user is directly granted access into the system - there is no email verification (as ...
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votes
6answers
1k views

How to defend vs. Image Remote File Inclusion, e.g. RFI using a .gif file (Apache/PHP)?

To defend versus Remote File Inclusion where attackers try to abuse image files, I usually recommend to never use include to include image files into PHP code. Sometimes though, the avoidance of ...
18
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3answers
2k views

What steps should be taken to validate user uploaded images within an application?

Recently I have worked on a number of applications that need to process user uploaded images steps have been taken to validate the extension and the mime type. But what else can be done to ensure ...
13
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4answers
610 views

what to do after suspected intrusion on hobby webserver

I maintain a server to host my files and a number of websites for hobbies and friends. I just noticed that the site summary being returned in google for one of my domains were all porn related ...
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votes
3answers
1k views

Altering a $_SESSION variable in PHP via XSS?

Not sure if what I'm saying makes sense... but is it possible for me to alter a $_SESSION variable from outside the target PHP script? One of our scripts uses a $_SESSION variable and I'm not sure if ...
15
votes
3answers
740 views

Getting a manual security code review done - What to watch out for?

We have a PHP application that we want to get code reviewed from an external security consultant, but I'm not clear on "how to" go about that process. We did specify what kind of tests he should be ...
13
votes
2answers
4k views

How to do Ajax securely?

This question is inspired by this security question http://security.stackexchange.com/questions/1707 What are the threats in using Ajax? (Please note I am talking about security threats, not ...
1
vote
1answer
348 views

Is this enough to tackle script / malicious code insertion in GET, POST requests?

I've got legacy PHP code which attempts to prevent script / SQL injection with the following: if (!empty($_POST)) { reset($_POST); while (list($k,$v)=each($_POST)) { ...
4
votes
1answer
764 views

How to prevent CSRF if you want to include Flash plugins in your form like Uploadify in your form?

What is CSRF? I need a basic definition that is not just lifted from Wikipedia. I understand SQL injection, XSS, cookie poisoning, but I just cannot wrap my mind around this. I am using a ...
5
votes
1answer
574 views

Good Security tool for PHP- Suhosin vs Spike vs PHPIDS

Do I have to check/test my code beforehand, or do these tools inform me when an attempt is being made in real time? Secondly, which one should I go for -- Suhosin or Spike or PHPIDS or a combo? What ...
7
votes
1answer
324 views

how to configure edit-restricted mediawiki

I am planning to setup a public wiki using mediawiki, but I never used mediawiki for a public site before and I am not experienced with it, even as a user. I am planning to create a very restricted ...
9
votes
3answers
558 views

What security features should be present in every web-based CMS?

What are the most important security features that a web-based CMS should offer? What's vital? What would be nice to have? What features should the CMS not attempt to do? Please note: I'm looking ...
6
votes
2answers
761 views

GET with additional parameters leads to “code injection” in html displayed

We got a security review done of our PHP code and the security company sent this in their report: Request GET ...
8
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3answers
2k views

PHP mail() Header Injection Prevention

This site nicely explains the problem. Essentially, nearly all php mail() examples that are given are vulnerable to header injection attacks. The referenced site gives a regex sanitation solution ...
9
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4answers
610 views

What information should a error log record?

I want to populate my error log with useful information if and when errors occur. I'd like to use the log to be able to spot and fix bugs on my site, but also to potentially log hack attempts. For a ...