An application that is accessed over a network such as the Internet or an intranet using a browser.

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5
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2answers
2k views

Website: Pre-Shared-Key Authentication

We have this web-application with high valuable (business) data. All communication is encrypted through TLS/SSL. While I consider this a really safe protocol, it can still be compromised if someone ...
1
vote
1answer
178 views

Security Standards for storing private customer data

A certain government regulation in my country mandates all non-resident donors to provide a copy of their identification (usually, the passport). So, we ask the donors to upload a copy of their ...
1
vote
2answers
499 views

Why should web applications use multiple gatekeepers?

I have been reading a security checklist for web application design which can be found on: http://msdn.microsoft.com/en-us/library/ff648647.aspx One of the recommendations is to "use multiple ...
1
vote
3answers
889 views

What is this for a Request?

i see the following request-string (see complete example below) with the same request_parameters, but differing values, hitting all our sites/wafs. the scheme is always the same: ...
7
votes
3answers
2k views

How important is CAPTCHA on registration pages?

I am working on a site and I would like to add CAPTCHA to the user registration page to prevent user name enumeration. I am working with a front end developer who feels pretty strongly that we should ...
16
votes
5answers
3k views

Is it possible to inject values in a drop down list?

Say a ASP.NET page, or any html page for that matter, has a drop down list with a bunch of prices. On posting the page, the code looks at the selection of the drop down list for a computation. Is it ...
4
votes
1answer
718 views

CSRF and Flash/Flex

Flash and Flex clients can make RPC calls to a server using the NetConnection and AMF protocols. It's not uncommon to have these RPC calls setup to authenticate based on a cookie. I've heard ...
0
votes
3answers
156 views

Securely transferring data from service provider to client

Suppose a client C wants to transfer form a service provider P, who collected data on behave of C using a web-application. Additionally, suppose the amount of data is larger than 100 MByte and ...
4
votes
2answers
537 views

Login security without SSL

I have a web app without SSL (I know it's not good, I try to take it as a challenge). The login is two step. First the admin sshs into the server and runs a maintenance companion program that provides ...
6
votes
3answers
169 views

Is it safe to store hashes of possibly non-existing passwords in a less safe way?

I would like to implement a lockout mechanism that not only protects against same username and many passwords attacks, but many usernames and same password attacks too. To implement this I figured I ...
1
vote
3answers
12k views

Is it possible to find who posted comment on my blogspot anonymously?

Problem Behind question : I own an blogspot site and people used to come and comment on my posts. In recent days I can see a spammer who comments anonymously on my every blog-posts. The comments were ...
3
votes
1answer
278 views

How effective is Caja at preventing XSS?

I recently found Caja which looks like an effective way of preventing XSS. From their site: The Caja Compiler is a tool for making third party HTML, CSS and JavaScript safe to embed in your ...
1
vote
1answer
368 views

How to check my application passes multiple virus scanners

I have an application I am trying to bring to market and I want to ensure that nothing in it is picked up by a virus scanner (since that would reflect badly on me). Since I only have a single scanner ...
2
votes
1answer
92 views

Web App Protection and Sign On

I have a client that wants to protect access to a web app in case the employee leaves because the app gives access to clients, sales, etc. He wants to "hide" the login credentials to this app and ...
5
votes
4answers
1k views

How should a webmaster manage all her passwords and keys?

I have several private keys that I use to ssh into AWS, dreamhost, github, etc. I have passphrases for all of these private keys that are too complex to remember. I have mysql passwords that my ...
2
votes
2answers
505 views

Do SPA applications have different security considerations than HTML5 sites?

I'm looking into Single Page Applications that are used for both mobile development (PhoneGap) and regular websites. Since the application can load from a offline copy, can run from ...
3
votes
2answers
229 views

Risks for a new type of website login feature

What would be a security risk for a website feature that allows you to connect to your account without typing your password, given that you allowed such a login for the next say 10 seconds from a ...
4
votes
1answer
894 views

HIPAA: How am I required to secure PHI database access creds on my web server?

Assuming I have a database of PHI that my web application needs to access, how am I required to secure the credentials on the webserver that the web application uses to access this database? Is ...
0
votes
3answers
814 views

CSRF possible if params are not passed through query string?

I was reading up on OWASP's page on CSRF and in their example they use a request where the sensitive parameters are stored in the query string: ...
2
votes
2answers
4k views

What causes “High Risk Website Blocked” on Chrome?

I have a website with no ads and no external content. Everything on the page comes from the webserver in question. Some users on Google Chrome have reported that they see the following warning when ...
2
votes
2answers
262 views

Dual Authorization (Social Auth 2.0)

Can you see any obvious challenges to requiring 2+ users to confirm authentication requests using an association such as a friendship type of relationship. A practical application would be an ...
1
vote
1answer
339 views

If my website does not take any user input, is there any danger in showing my code and folder structure?

First time posting here; apologies for any mistakes I've made, please edit, retag, migrate as appropriate. I have a simple homepage whose purpose is (essentially) to contain my contact info and some ...
1
vote
1answer
512 views

Secure browser storage

Where is a secure place to store a "secret" in a web browser that a User has access to and JavaScript does not? Thinking was along the lines of web history, bookmarks, built in password manager & ...
5
votes
1answer
589 views

What techniques do web services use to identify password theft?

I've noticed that some web services use a security scheme in which log-in attempts that have some unusual characteristics trigger extra authentication steps. For example when I try to login to my ...
4
votes
4answers
2k views

Is it safe to show user a message if account is locked

I am working on a web application, security is high priority. So, if a user has failed to login more than 3 times, the account will be locked. Should I display a message to the user saying "your ...
0
votes
0answers
765 views

Why do you need to login after you change a password? [duplicate]

I can't recall a website that after resetting my password I was automatically logged in, I had to type the password again - which seems quite silly. From a security perspective, why do websites do ...
1
vote
1answer
557 views

How does the authentication flow with Azure Active Directory differ from Azure ACS?

I understand that Azure ACS acted as a STS that had the ability to redirect users to a given STS (OpenID, LiveID, Facebook) or authenticate using a local user/password account. In a passive situation ...
0
votes
1answer
27k views

Error150 (net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN): The server's certificate appears to be a forgery [duplicate]

Help me guys please i'm having an problem with my google account. I can't log in it keeps saying : Error 150 (net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN): The server's certificate appears to be a ...
1
vote
0answers
356 views

Generating API keys within an OAuth2 session for non-web-browser clients

I am using Google's OAuth2 for authentication for a website which also has a RESTful API component. I would like to support connections from clients which are not within a web browser. Also, I'd ...
2
votes
1answer
509 views

Are there any risk in serving static assets via compressed SSL protocol from 3rd party domain?

e.g. curl -v -H 'Accept-Encoding: gzip' 'https://cdnjs.cloudflare.com/ajax/libs/Colors.js/1.2.2/colors.min.js' As you can see, result is gzipped. My assumption is since they are serving from 3rd ...
2
votes
3answers
3k views

Cross site scripting prevention removing &lt and &gt

I'm testing an application that only skips < and > symbols. The user input being validated is always inserted between html tags like <b>, <span>, <div>, etc. and never passed ...
3
votes
2answers
937 views

Reusing the same session-ID necessarily bad?

The question is related to session-ID management in a particular php-based web-app. The web-app uses the same session-ID for each session for a fixed user. So, after logging-out of the application, ...
28
votes
3answers
3k views

How long should an e-mail address confirmation link last and why must it expire at all?

After a user registers an e-mail is sent to them with a link they must click on to activate the account. I know other sites have a limit on the amount of time the user has to click the link, else the ...
3
votes
1answer
374 views

Why do major sites (eBay, Github) not ask for a password when I attempt to change email addresses?

When users change their email addresses within a web application's user account, I see the following problem: An attacker (who has access to your session) could change your email address to a new one ...
2
votes
3answers
2k views

Javascript containing a long hexadecimal string and eval: is this suspicious?

At the bottom of the index.php file for a simple “contact us” form, I found the following (some whitespace and newlines added): try {if(window.document)--document.getElementById('12')} catch(qq) ...
0
votes
2answers
168 views

General User Authorization Security

I am creating a website that needs user authorization. It is my first time creating a website to go live, and also my first time trying to do any form of authorization. The following is my plan, will ...
1
vote
3answers
301 views

Do obscure image URLs prevent image harvesting?

On a Web site which requires user login, and all content is viewable by any registered user, is there any point in making obscure image URLs like "1mh9cr2m78234bc23-32xy4723nxy12.jpg" to protect the ...
5
votes
3answers
1k views

Do I need to expire a session cookie when sessions are handled server-side?

The only data in the cookie is the session ID. There is no expiration timestamp set when creating it, a session is always evaluated server-side to see if it has expired. When logging out, the session ...
39
votes
15answers
7k views

Should we protect web application source code from being stolen by web hosts through obfuscation?

Is it worth to obfuscate a java web app source code so that the web host cannot make wrong use of the code or even steal your business? If so, how should this be dealt with? How should we obfuscate? ...
8
votes
2answers
1k views

Slowloris attack?

Could someone analyze this info? We got information that slowloris attack took place. They say (hosting stuff) they have implemented mod_antiloris, is that enough btw? Feel free to share your opinion ...
1
vote
3answers
819 views

How to expose a client's real IP address?

As a forum administrator, how can I find a client's real IP address? Are there any third party tools or weakness that expose the real IP address?
3
votes
1answer
540 views

Can Exchange/OWA still compress static images and be immune to HTTP compression attacks?

Microsoft Exchange / OWA (Outlook Web Access) allows for three different types of compression (link for Ex2010) Compression setting Description High Compresses both static and ...
3
votes
2answers
2k views

Automated URL Discovering

I built a simple server containing static files at /files/ and I'm attempting to discover them using automated tools. I'm using wfuzz to brute force on the URL but is that the only way? Is there any ...
1
vote
1answer
149 views

Impact of using map APIs without SSL support? [duplicate]

We are currently developing a web application which involves map APIs. Most of the map API providers don't provide any SSL support (e.g. Yahoo! doesn't). What will be the security impact of using map ...
3
votes
1answer
705 views

How can I check the iframe on my website is secure or not?

My website has an iframe used for loading my client's websites (only 5).How can I make sure the iframe is secure? Also by editing iframe src It allows to load any other websites.How can I prevent it?
-3
votes
1answer
1k views

ESAPI: Input and output validation [closed]

I am new to IT Security and I have been tasked with coming up with input and output validation for ESAPI. So for input validation, so far I got: Data Type Name Email ...
10
votes
3answers
497 views

How could the string \";alert('XSS');// be used for XSS?

I was using Burp Suite for some testing and I noticed that they included the following string: \";alert('XSS');// as an attack string for an XSS payload. How could this string be used to execute ...
3
votes
2answers
2k views

IS TDE PCI-Compliant?

According to PCI PAN can be stored in the database as long as strong cryptography is used. I couldn't find which cryptography is considered strong according to PCI. Here's the issue: I have PAN ...
4
votes
1answer
1k views

Encrypted view state vulnerable?

While reading up on view state as a possible means to prevent CSRF, I came across this Microsoft Security Bulletin which states: An attacker who successfully exploited this vulnerability could ...
5
votes
4answers
1k views

Why is this response splitting attack not working?

I'm working through OWASP's "WebGoat" (version 5.4) vulnerable web application, but I'm getting stuck on one of the earliest lessons which is to do with HTTP response splitting. I've looked in all ...