A web browser is an application which uses http and related protocols to retrieve HTML and XML data from servers. As the web has become a critical source of information and communication, web browsers have become a critical component in information request, transfer, and management.

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2
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3answers
2k views

Do client certificates provide protection against MITM?

I'm looking for a way to protect clients from a MITM attack without using a VPN, and ToR. My thought is that client certificates might do the job, but I'm not entirely sure since not too much server ...
30
votes
8answers
8k views

Is anybody using client browser certificates?

Client browser certificates seem to be a nice way to protect sites from intruders - it is impossible to guess and should be harder to steal. Of course, they do not solve all the problems, but they add ...
7
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1answer
902 views

Have any viruses leveraging the GPU been discovered in the wild? What is the mitigation?

This news article from 2010 discusses how a GPU can be used by a virus to avoid detection by common anti-malware/anti-virus software. The idea is to obfuscate the virus payload and leverage the GPU's ...
3
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0answers
69 views

Is the use of JavaScript for cryptography ever appropriate in the browser? [duplicate]

Possible Duplicate: How secure is aSSL (javascript)? Does it effectively mimic SSL? After some searching around, I realized we don't have an easily visible canonical question about this on ...
3
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1answer
383 views

How can I use certificates to secure my webservices? What is available to javascript?

I have a few web services that are accessed over public wifi connections and I think it would be a good idea to issue certificates to encrypt data, prevent MITM, and invalid impersonation (beyond what ...
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2answers
282 views

What technologies are recommended for E-banking? [closed]

If a Linux user need use his bank account from Internet, then what technologies and procedures should use? Is better to use the Guest Account (if exist) of the OS, or an Administrator Account? What ...
5
votes
3answers
330 views

Are there guidelines for application design of HIPAA compliant browser applications?

This is a different twist - I'm pushing dispatch information to first responders, such as fire, police, and EMS. But they all could, potentially, include medical information and PII together. My goal ...
6
votes
1answer
1k views

Same-origin policy for file: URLs in Android browser?

When you load a file:// URL in an Android WebView or in the Android browser, what does it treat as the origin? What can the Javascript on that page access? Can it access other files in the same ...
2
votes
3answers
422 views

How prevent Javascript from obtaining my location

I usually use a proxy server to browse anonymously. Now I realize that it is possible to find the location of a user using the Geolocation API. How to anonymously browse without disabling Javascript?
3
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3answers
4k views

cookies “secure” flag

How does cookies "secure" attr work to determines whether cookie itself should be included? e.g. [HTTP(unencrypted) connection] 1. user has no cookie yet and tries to log in; 2. user logs in ...
0
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3answers
138 views

Does AV software protect web applications (Twitter, Facebook, etc) from attacks? (CSRF, etc)

Is it correct to say that AV software focuses on downloaded executables and locally malicious activity, and it doesn't actively scan HTTP/S content for web based attacks such as CSRF, XSS, phishing ...
4
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1answer
488 views

Updated version of Browser Security Handbook

Google's Browser Security Handbook is a brilliant resource for web application security, and in particular, for understanding how browsers behave. It discusses many issues, and contains tables ...
8
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4answers
1k views

Preventing insecure webapp on subdomain compromise security of main webapp

I want your help on getting more concrete information on a type of vulnerability that I remember vaguely. I vaguely remember hearing about a year ago that if you set up a webapp on a subdomain, and ...
3
votes
1answer
25k views

does Avast SafeZone actually make a difference?

SafeZone is a feature in Avast Anti-Virus which is like a virtual machine that only has a web broswer. The benifit of this is that it can't be infected with spyware and isn't suseptible to keylogers. ...
20
votes
2answers
3k views

HSTS extra security over HTTPS

Is HSTS good to use even if my servers are configured to use HTTPS (Even if HTTP is used, the rewrite rules in apache makes it to HTTPS) Also does HSTS make even the resources like CSS, images to be ...
11
votes
4answers
1k views

Why isn't OCSP required by default in browsers?

According to the following screenshot, taken from firefox-3.6.17-1.fc14.i686, Firefox has an option to fail closed when unable to connect to OCSP servers. Can someone please explain why this isn't ...
7
votes
3answers
6k views

CSRF cookie vs session based tokens

I will generate a CSRF token and include it in a hidden form field. When receiving the request, I will check the form value against the value either stored in the user's session or in a cookie. Is it ...
2
votes
1answer
2k views

Is autocomplete=“off” compatible with all modern browsers?

There are a lot of answers on the subject (including some on StackOverflow), but none of them have recent or updated answers: I can't seem to find any documentation indicating which browsers support ...
9
votes
2answers
687 views

User-specific Subdomains : JavaScript security

If I provide a public-facing website for users on my website at their own subdomain (e.g. bob.myapp.com) under their own control, can I allow them to execute arbitrary JavaScript without putting my ...
4
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1answer
348 views

Need help on understanding obfuscated code in CVE-2012-4969 exploit

As you may know this vulnerability was found a while ago in the wild and the exploit is available too, btw I'm having problem on understanding the obfuscated code. Is it necessary to use obfuscation ...
1
vote
1answer
188 views

Is truecrypt a good choice to work with file that are generated and manipulated via browser

i'd like to know if Truecrypt is a reliable software for filesystem encryption, at the level of pgp as security level, and if it suitable to work with files that are generate via web browser, so ...
3
votes
3answers
1k views

What are methods for preventing browser hooking / drive-by downloads?

This question may be a bit too broad and open ended, however I'm hoping to get some good advice on this. With the advent of BeEF and more and more of the computers in networks being infected just by ...
5
votes
1answer
972 views

When and Why does Chrome display malware detection warning?

Google Chrome contains malware detection feature. When user visits some site, browser may display warning that site contains malware. What does it mean that site contains malware? Does it mean that ...
2
votes
3answers
469 views

Can I tell which applications embed Internet Explorer at a command prompt?

A recently discovered vulnerability affects Internet Explorer versions up to version 9, running on Windows XP, Vista, and Windows 7. This arstechnica article quotes HD Moore as saying, Just keep ...
4
votes
1answer
915 views

How to disable caching of form data?

A web page accepts user name and password data within an HTTP POST request. This POST request actually shows up as an entry in the browsers history. After user logout from the application and ...
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votes
2answers
104 views

What happens when and attacker changes the installed public keys in browser

I was reading about SSL. I understood that each browser comes with a predefined set of known public keys,which is then used to authenticate the messages. I was wondering what will happen when a virus ...
5
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2answers
3k views

How is user authentication sent in a public wifi? Radius/802.1x/EAP etc

I visit the airport, I pull out my laptop and connect to a network (no password needed). I open up my browser and i am presented with a screen saying I need to pay to use the network. If I pay, I ...
14
votes
4answers
3k views

TLS 1.0 JavaScript injection vulnerability (BEAST): what to do client-side?

With the alleged SSL/TLS vulnerabilities used by the BEAST exploit, there seems to be a security gap between TLS versions; TLS 1.0 being the problematic one but still the only option for many sites. ...
9
votes
2answers
7k views

Is BEAST really fixed in all modern browsers?

BEAST is said to be fixed in all modern browsers: Chrome and Firefox IE in Jan 2012 Opera in Dec 2011. It's also fixed in OpenSSL since 2002. Do these fixes mean that it's safe to use ciphers in ...
7
votes
3answers
2k views

What are potential security risks when using an insecure wireless connection?

If someone is using an insecure wireless connection (for example a hot spot in a coffee shop) does it posse a threat even if the person is using a secure application layer protocol? What I mean by ...
20
votes
2answers
2k views

From a technical standpoint, how does the zero-day Internet Explorer vulnerability discovered in September 2012 work?

I'm looking for an answer that explains the issue from the prespective of a developer/engineer. What is exactly being exploited and why does it work? Please note that I am not looking for ...
3
votes
1answer
433 views

Can JavaScript defeat source port randomization?

Can malicious JavaScript defeat source-port randomization in browsers? I am reading a research paper which seems to claim that the answer is yes: many browsers seem to always assign a random ...
5
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1answer
254 views

What issues might exist with TLS-OBC's emulation of Browser Certificates?

TLS-OBC is an RFC proposal that increases SSL/TLS security by using certificates on both ends of the TLS connection. What's special here is that the client is permitted to dynamically create a local, ...
5
votes
2answers
788 views

HTTPS Sensitive Information and Caching

I have a website where I need to share a sensitive key with the user. Of course, I'm using HTTPS on the page. The key is put into the HTML server-side in ASP.NET. My concern is, if the user's computer ...
3
votes
2answers
3k views

Why are CSRF tokens necessary?

It seems that the entire problem could be solved very elegantly by simply adding a new flag to the HTTP cookie specification. Similarly to how cookies flagged Secure will only be submitted by the ...
5
votes
3answers
240 views

Could browsers improve security of stored passwords by using setuid?

On Unix-esque systems, Mozilla Firefox stores a users' preferences, web history and stored passwords in a set of files that are readible and writeable by that particular user. This makes sense: when ...
2
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2answers
1k views

What if a browser does not understand the secure flag of cookie

I have two questions related to the same: 1 - As 'Httponly' attribute is understood by a set of modern browsers (https://www.owasp.org/index.php/HttpOnly#Browsers_Supporting_HttpOnly), I was ...
1
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0answers
35 views

What is the smallest possible Windows shellcode? [duplicate]

Possible Duplicate: Are there any tools that focus on shellcode analysis? Any tools available that is for shellcode analysis? what methods are used in reverse engineering?
8
votes
5answers
361 views

Is it a risk to highlight text while reading a webpage?

Whenever a user selects or highlights text on a webpage, an OnClick() event is generated. Some of the web browser security models depends on explicit end user interaction, such as OnClick(), before a ...
5
votes
1answer
269 views

Where does the responsibility lie for a XSS vulnerability

I am an avid user of Workflowy (online outliner/note taking tool) and I installed the Chrome extension 'Workflowy for Coders', which formats the text within notes. I discovered that one of my notes ...
1
vote
3answers
518 views

Why can I read the response to this CSRF attack?

I have a website www.foo.com:8002 that I have resolve to 127.0.0.1:8002 in my hosts file. I have another (the main site) running at localhost:80 In www.foo.com:8002 the page looks like <form ...
7
votes
3answers
2k views

Web Browsers and Cross Origin Resource Sharing

The CORS spec states that if a request method and headers are not simple (http://www.w3.org/TR/cors/#simple-cross-origin-request) then a preflight HTTP OPTIONS request is sent to see if the request is ...
1
vote
4answers
176 views

how to identify whether my page is phished or normal page?

Usually I differentiate phished page and normal web pages by seeing https before the address of the web page, as the lock symbol will help us to identify. Are there any other methods to differentiate ...
0
votes
3answers
10k views

Web browsing on Windows 2008 R2 terminal server (RDS)

I'm setting up a Windows 2008 R2 terminal server which users will connect to from thin clients. Since the thin clients don't have a web browser I need to allow users to surf from their terminal ...
3
votes
3answers
469 views

What is the actual security of this login page?

Please visit https://devforums.apple.com If I visit this site using my Safari 6 web browser, this page does not show the normal security indicator that secure sites normally show. Does this ...
6
votes
3answers
348 views

How safe are copies of Firefox that are on various Mozilla mirror sites?

If I end up downloading a .dmg or .exe (depending on OS) installer from some mirror site, how can I be sure that a virus or trojan or spyware has not been added? I don't see any mechanism for ...
4
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1answer
1k views

Are there any know browsers that support file URL redirection?

I've been addressing an open-redirect issue and in experimenting with the latest fix, I noticed that updating the redirect's protocol to file resulted in a blank page on the browser. That is, ...
3
votes
2answers
589 views

Why do I get AV alerts when browsing a web page?

I'm using the latest version of Firefox and Windows is up to date. When I was browsing a webpage and clicked a link the browser displayed "connection has been reset" and AVAST poped-up saying "Alert!" ...
1
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0answers
179 views

What are potential use cases of script that identifies browser? [closed]

Let's say I've found a way to produce a unique string for each and every browser using pure Javascript (which makes it an alternative to UA strings). Now what I'd like to know is what are potential ...
3
votes
1answer
268 views

Client-side cross-site access in SSL environment - when it's still possible to do?

I'm trying to imagine an secure sandboxed environment for an application which is big and unexplored, and may contain backdoors. It would live under chroot/virtual environment with no outgoing ...