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

learn more… | top users | synonyms

8
votes
9answers
378 views

What is the proper way to view the sourcecode of a website?

I recently heard that Firefox makes a second HTTP request when the sourcecode is requested. Is this true? Does this mean the webserver may issue alternate source from the original? Lastly, is ...
6
votes
5answers
631 views

Should a closed source website keep a secret key in its source?

Various APIs (such as Facebook or Amazon S3) require a secret key to authenticate access to the service. Obviously, if source code is public, the key should not be in the source! What about for a ...
22
votes
5answers
1k views

How to improve as a security expert

I'm a professional software developer with a high interest in web application security. I'd say that I probably have a better understanding of the security of web applications than the average ...
4
votes
5answers
3k views

Should I ignore the BEAST SSL exploit and continue to prefer AES?

Because of the BEAST exploit it seems everyone is saying you should stop using AES and instead use RC4. I am wondering if it wouldn't be better to continue using AES instead for the following ...
4
votes
1answer
590 views

What is the impact of certificate validation level (or class) on deployed web applications?

Certificates can have a class level (or validation level). What is the impact of these levels on deployed web applications? More specifically: Is the certificate level included in the certificate ...
4
votes
1answer
388 views

Any non-commercial certificate authority issuer for web applications?

Is there any non-commercial certificate authority capable of issuing valid certificates for web applications? I mean, the certificate must be accepted by browsers, like those of commercial CAs?
9
votes
2answers
6k views

Implications of Trace/Track Methods on Apache

When performing vulnerability scans using Nessus, against a host running Apache, one expected result is always "HTTP TRACE / TRACK Methods Allowed". While this result only has a base CVSS of 4.3, I ...
4
votes
1answer
5k views

Is the service join.me actually a huge security risk?

In case you don't know, there is a website called join.me which lets you do screen sharing from a browser, using a flash program that is on the web page. Until I encountered this service, I had no ...
6
votes
4answers
4k views

Can Central Authentication Service (CAS) do authorization?

I have a few web applications that I'm trying to tie in via CAS, but I'm a little confused about the authorization, which I read CAS isn't supposed to do. Yet, I see something like groups, but don't ...
3
votes
3answers
2k views

Google App Engine Security

I am writing a master thesis concerning security of certain applications, and as a part of it I want to write a web app on Google App Engine and test how secure it is. Does anyone know if there was ...
0
votes
0answers
102 views

Google App Engine Security [duplicate]

Possible Duplicate: Google App Engine Security I am writing a master thesis concerning security of certain applications, and as a part of it I want to write a web app on Google App Engine ...
6
votes
2answers
198 views

Where can I find good resources on reversing web malware?

I am wondering where I can find a good site with resources on reversing web malware like javascript, flash, html5, and any other stuff that is designed to attack the clients. Does anyone have any ...
13
votes
2answers
174 views

Would suggesting a random passphrase during sign-up hurt overall security?

I've been looking for ways to improve security and security awareness for both internal and external clients and I happened upon the idea of generating a one-time, random "password suggestion" on the ...
10
votes
3answers
2k views

Using file extension and MIME type (as output by file -i -b) combination to determine unsafe files?

We allow users to upload a number of files, all of which we either send over to scribd (doc, xls, ppts, etc) or display as a video ourselves (flv, mov, mp4, etc in flowplayer). To avoid users ...
5
votes
3answers
901 views

Is security increased by using a subdomain per customer in a web-app?

I'm thinking about adding per-customer subdomains to my web app (which would mean a wildcard ssl certificate and some extra code). It's an app to help small companies with their cashflow. Customers ...
0
votes
1answer
405 views

What are some good resources for learning how to hack my website? [closed]

Note: This is for my personal use. I'm not going to hack someone else's website. I have several websites, and I'd like to learn how to hack them so that I can secure them. Where can I find some good ...
3
votes
2answers
989 views

Payment gateway integration, any security considerations?

I'm interested in understanding what security considerations there are around implementing a payment gateway. I have, so far, thought of: having a SSL Cert is a MUST. logging actions is critical. ...
4
votes
2answers
151 views

Scan for common web applications?

Is there an automated tool that takes a list of hosts and figures out which common web applications (such as Wordpress, Mediawiki, Joomla etc) they are running and - if possible - which version and ...
2
votes
1answer
825 views

folder and file permission shared host advice

I have a website with a webhost company. I wrote a little php/mysql application - no file uploads, just administering data from the DB and creating pdf with TCPDF. There are folders like css and js ...
43
votes
11answers
7k views

What to do about websites that store plain text passwords

I recently received an email from a popular graduate job web site (prospects.ac.uk) that I haven't used in a while suggesting I use a new feature. It contained both my username and password in plain ...
2
votes
1answer
310 views

Security reason why one should upgrade old web server to modern Java EE Web Application Server

Currently the company I work for uses Sun Java System Web Server 6.1 SP9 and Java 1.4.2. I know this version of Java reached its EOSL around 2008. The Sun Server still seems to be supported but it's ...
8
votes
6answers
855 views

when is it safe to click through an SSL warning message?

How does a user know if it's safe to click through scary browser warnings about SSL certificates? Ideally, a user should never need to click through these warning messages, but sometimes honest ...
4
votes
2answers
2k views

How to find and protect against the exploited vulnerability in a PHP application based on the logged URL?

I have been attacked on a shared host server and they said I should configure my own php.ini file properly. I have a little PHP/MySQL program with a registering function, a little admin site. ...
2
votes
3answers
2k views

Authentication between multiple systems/platforms within the same web application context

Consider the following scenario: Web application is using two separate systems (they can share data/state through DB). First one is used for processing standard web stuff like http requests/responses, ...
3
votes
1answer
709 views

Securing sensitive data in a DB,is using H2 worth it?

I am designing a web application at the moment, and one of the requirements is to secure the user credentials as well as their roles. Now of course, besides the usual password hashing + salt +.... I ...
4
votes
2answers
994 views

Is it possible to test for Postgres BlindSQL injection using pg_sleep() in a WHERE clause?

In mysql, I am familiar with using the following payloads to test for blindsql when the WHERE clause is vulnerable (all payload examples from fuzzdb): 1 or sleep(TIME)# " or sleep(TIME)# ' or ...
3
votes
2answers
141 views

Need an overview of web service / web site security world, where do I start? [duplicate]

Possible Duplicate: Resources to learn about security I'd like to get a good understanding of modern issues in web security and get insight into what it takes to keep your sites and ...
12
votes
1answer
3k views

enable browser caching with HTTPS

I understand that sensitive data should not be cached (ie, you dont want to cache an HTML file with all of your bank account details in it), but there are some things that HTTPS protected sites should ...
21
votes
3answers
7k views

How should web app developers defend against JSON hijacking?

What is the best defense against JSON hijacking? Can anyone enumerate the standard defenses, and explain their strengths and weaknesses? Here are some defenses that I've seen suggested: If the ...
8
votes
4answers
2k views

Is using HMAC to transmit a password OK?

I'm writing a small webapp and I don't want to transmit login passwords as cleartext. As I don't have SSL available I've written a one-time challenge system which sends a random string with the login ...
4
votes
2answers
386 views

Is Common Criteria (CC) a suitable standard to certify web applications

I never came across a web application that has been certified according to Common Critera. As far as I know there isn't even a protection profile available for web applications. What is the reason ...
6
votes
3answers
803 views

Attack vectors for brute-forcing website passwords

When talking about password security, a lot of discussion centers on the risk of a password being guessed in a brute-force attack. For websites where a user has registered an account, what are the ...
4
votes
3answers
177 views

What alternatives do email services provide when an account is hacked?

I am concerned about how does email services like Yahoo, Gmail, Hotmail etc provide security to their costumers and prevent their account from being compromised. For example, I have seen that if ...
7
votes
5answers
350 views

Is there any added security benefit to username complexity requirements?

I've come across several sites lately that have complexity requirements for usernames like "must be 8 characters long and contain at least 2 numbers". Is there any real added benefit to this from a ...
7
votes
2answers
404 views

Why do some online banking sites (and others who desire secure login pages) sometimes add autocomplete=“off” on their login page input fields?

For example: http://www.natwest.com/x-user.ashx?redirect=trusteer.interstitial.url&condition=trusteer.enabled2%3Dtrue <input name="...." type="text" maxlength="10" ...
1
vote
1answer
207 views

Working of WAF/IDS/IPS payload normalization schemes?

I want to know how WAF/IDS/IPS deals with Payload Transformations. Such payload transformations may be base64Encode html EntityDecode url Encode Remove whitespaces I want to know how WAF/IDS/IPS ...
7
votes
1answer
122 views

What should be included in the ground rules for an attack review?

I've drafted some ground rules for a call for adversarial attack-review. I've tried to cover the following topics: Link to the policy that I want to enforce. Link to a minimal testbed and ...
6
votes
4answers
609 views

Secure Web Password Fields + http to https redirect

I'm a software developer but I'm marking my niche in secure development. It turns out that while using WebScarab, I discovered that a popular user group site doesn't appear to properly take care of ...
6
votes
3answers
204 views

Detecting OAuth malicious Implementation

I am wondering how can an end-user detect a maliciously implemented OAuth whether 2-legged or 3-legged. Particularly I am interested in those cases where the consumer requester is maliciously ...
4
votes
2answers
523 views

Is this an example of XSS attack?

A scripter sees on certain web pages it's technically possible to include markup like HTML and CSS/JS. It's technically possible to submit a javascript or iframe and have it display to the visitor ...
18
votes
3answers
2k views

Should I have a maximum password length?

I'm creating a webapp, and part of my authentication method is password length. Should I put one in place? (say, 50 characters?) Or should I just put a minimum length (Currently at 6). Are there ...
26
votes
3answers
7k views

What useful things can I do with the html5 “keygen” element?

There's a new* keygen element in the html5 spec. It's supported in major browsers excepting Internet Explorer and Safari. Here's what it looks like: <form action="processkey.cgi" method="post" ...
10
votes
2answers
881 views

What are the SQL-injections issues of parameterized queries?

I've written some code to generate an SQL query in ASP classic. I'm not sure if it's secure or not: Set adoCon = Server.CreateObject("ADODB.Connection") adoCon.Open "Provider=Microsoft.Jet.OLEDB.4.0; ...
3
votes
2answers
1k views

Is this algorithm for a random string cryptographically secure?

I've pieced together this algorithm (if it can be called that) from various bits of code I've seen online, and I'm wondering how cryptographically secure it is. It's used to generate passwords: ...
5
votes
2answers
613 views

Beginners materials for web security [duplicate]

Possible Duplicate: Resources to learn about security What materials can I study to learn web development security. I'm a web developer, I use ASP.NET, Java, PHP, and JavaScript. I want to ...
13
votes
3answers
525 views

Does signing out of a website ensure no-one can cookie hack?

If I click the signout link of a website, does this mean it is not possible for someone to hijack my cookie and sign in with it? While I'm logged in, is it possible for someone who has access to my ...
0
votes
1answer
199 views

Where can I practice web-security or network-security? [duplicate]

Possible Duplicate: Servers for penetration testing I'm in a process of learning security of networks and websites. I already practised code reviewing but I want to perform exercise. Is ...
9
votes
4answers
536 views

Worthwhile from security standpoint to limit database server user for ASP.NET website to only EXECUTE on stored procedures?

I know that obviously we must avoid sql injection attacks through user input validation and parametrized queries. There's already a firewall in place on the database server to limit remote ...
8
votes
2answers
3k views

Is doing credit card transaction via 3G secure?

3G, GPRS or other mobile-based connection. Because it seems like it's easier to intercept, than, say, land-based connection or encrypted WiFi. If it matters, the transaction I want to perform is ...
4
votes
3answers
1k views

Is it necessary to encrypt an ASP.NET view state hidden field when using SSL certificate?

If you have an SSL certificate for a web site, is it necessary to make the ViewState more difficult to decode. Without any extra development, it appears that ASP.NET encodes it as a base 64 string. ...