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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How can end-users detect malicious attempts at SSL spoofing when the network already has an authorized SSL proxy?

I'm working on one client's network where they have enabled HTTPS authority spoofing on their proxy. This allows them to effectively perform a man-in-the-middle attack to decipher all outgoing ...
6
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1answer
476 views

Browsers silently adding trusted root certificates in Windows

When accessing https://internetbanking.caixa.gov.br (site of a well known bank in Brazil), the server returns a certificate signed by "Autoridade Certificadora Raiz Brasileira" (Brazilian Root ...
6
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2answers
249 views

Zero-Day Exploit targeting Internet Explorer Versions 9 through 11

Few days ago, FireEye has found a vulnerability, which affects all versions of IE (even the latest 11). Microsoft has official statement regarding this issue. FireEye wrote a technical article on ...
6
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3answers
277 views

How do I secure my advertisement space against ad overlay browser attachments?

I don't really have an issue with advertisements simply being blocked by individual users who are visiting a customers site or my own site. As an individual you have the freedom to choose not to look ...
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6answers
11k views

Using Private Browsing mode while connected to organization's network

At the workplace I use the organization's network for accessing internet (well that's the only option). I am not sure if the network administrators monitor what I browse, how frequently I access ...
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4answers
553 views

What is a good browser for web application pen testing? [closed]

I am getting started in testing web applications, and I am having trouble verifying vulnerabilities. It seems all modern browsers have protections against things like XSS. When something like Burp ...
5
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3answers
229 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 ...
5
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3answers
272 views

Is “untrusted code” reported by DOM Snitch a vulnerability?

One of the most frequent errors that DOM Snitch finds in sites is Untrusted code. He finds it in google.com for example. Here is an output of this tool: Is it a vulnerability? Edit: This report of ...
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4answers
11k views

Security issues using iframes

We are looking to move to iframes due to technical challenges. By moving to iframes it will be easier to manage the technical issues. But we are not totally sure of security implications of iframes. ...
5
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3answers
379 views

Is Content Security Policy an approach that is worth to support?

Mozilla Firefox 4.0 supports something called Content Security Policy that disables the interpretation of embedded Java Script. Only external Java Script files that are referenced using a script tag ...
5
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1answer
207 views

Is this a security flaw in Firefox 18.0?

I had a couple of .mht files which opened in IE, a browser I never use. I renamed their extension to .HTML to run it in Firefox. When I opened the file in Firefox, Firefox created new tabs endlessly. ...
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5answers
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How to avoid leaving any local trace that I went to a website?

I want to visit a web site, but I want to ensure there is no trace left on my computer that I did so. How do I do that? This question is not concerned with anonymity or detection on the network ...
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2answers
487 views

RC4 bias protection with padding in TLS

On the answer to my previous question about RC4 vulnerabilities in TLS, Thomas Pornin gave a great answer, in which he said: One way to "fix" RC4, which has been suggested many times, is to drop ...
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2answers
6k views

DOM Based XSS attacks: what is the most dangerous example?

I knew that XSS attacks (“non-persistent” and “persistent”) can hijack user session, deface websites, conduct phishing attack, etc. However, I can't understand what is dangerous of DOM Based XSS if ...
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1answer
1k views

What are the benefits and drawbacks of the HTML5 Keygen element?

As of January 2013, what are the potential benefits and drawbacks of the HTML5 Keygen element?
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4answers
693 views

Suggestions to avoid cookie-hijacking in a web application

I've been developing web-apps for quite some time now. While making websites, the "remember me" feature is one of the most trivial(read as must-have-for-clients) feature to be implemented. Until ...
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3answers
4k views

Javascript Malware: How does it work, and how can it be mitigated?

I am wondering how malware gets served through Javascript. I've noticed a few illegitimate pop-ups while visiting some financial websites. I wonder how malware exploits work against the application ...
5
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2answers
590 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 ...
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2answers
561 views

Workarounds for :visited CSS History reconnaissance

Several years ago it was possible to use a:visited { background: url('/log.php'); } to figure out on what website user has been previously. But now it is restricted by browsers. Is there any ...
5
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2answers
336 views

What protects cookies?

What protects cookies from being stolen? After all, they are just text files. A misbehaving browser can give up a lot more information that web masters would like. How do I know that a browser won't ...
5
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7answers
385 views

Malicious Websites

Just wanted to get everyone's opinion on this. In Information Security, you get various alerts about particular machines on your network going to sites and/or IPs that have been flagged as ...
5
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1answer
281 views

How safe is “trust this computer” option for websites?

Many sites have a "trust this computer" option that allows one to bypass some security measures (ex.: with Google's 2-step authentication enabled, one does not need to enter the phone's code if the ...
5
votes
1answer
998 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 ...
5
votes
1answer
222 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 ...
5
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1answer
40k views

Chrome is telling me I am receiving a forged certificate for Gmail, is someone trying to hack me?

I went to log on to https://mail.google.com this morning and I got the following error. Is someone trying to attack me or is this just a bug? I'm on a WPA2 encrypted wireless connection using Chrome ...
5
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2answers
209 views

Exactly how secure is VM browsing?

I generally do all of my web browsing in a VM. I have one "safe" VM running Ubuntu that has guest services installed. I generally only go to sites I deem are trustworthy here. I also have an "unsafe" ...
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1answer
706 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 ...
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4answers
447 views

Is it harmful to redirect web bugs to localhost on hosts file?

I was checking the article hosts file on Wikipedia, and I found this: Blocking access to servers of unwanted content by redirecting them to the local host (127.0.0.1) may have security ...
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votes
3answers
2k views

How can I protect my saved passwords in Chrome?

I'm currently using WIN+L, and sometimes Kid-Key-Lock, to prevent anyone from checking my storaged passwords but if I forget doing it only once, all of them are vulnerable of theft. How can I protect ...
5
votes
3answers
411 views

How to sandbox Iceweasel (Firefox) on Debian? [closed]

Are there any tools for sandboxing Iceweasel (Firefox) on Debian systems? I'm mostly interested in tools distributed by Debian. (An equally trustworthy source would be second best.) (I suppose that ...
5
votes
1answer
210 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
1answer
207 views

How much protection does the Kill-Bit provide for ActiveX controls?

I have some ActiveX controls that are not supposed to run in the browser but only in my particular Front-End. I know that by setting the Kill-Bit I disable their execution in Internet Explorer and MS ...
5
votes
3answers
268 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 ...
5
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1answer
523 views

Child iFrame hash verification of parent iFrame content

Consider the following scenario: Alice wishes to browse Victor's website while on the job at Initech. Victor's website is hosted on an alternative domain name system to which Initech's DNS does not ...
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1answer
282 views

Is there any risk to enabling CORS with a wildcard on S3?

By default, Amazon S3 blocks cross-origin requests. However, it allows users the ability to set up per-bucket CORS policies. It offers fairly elaborate controls for which domains and methods the user ...
4
votes
2answers
1k views

Could a malicious JS file pointed on URL/URI attack the browser/computer?

I found some website blacklisted on Google. I mean when you try to visit them, you get something like shown on this picture: After a small search, I found that some of them have a malicious ...
4
votes
3answers
447 views

Is changing image's extension prone to error for browsers?

In my uploading user's avatar scenario, I change users picture extension to jpg. Is this making the browsers to act differently? Is it prone to error for browsers when they read users avatar? ...
4
votes
5answers
13k views

Playing with Referrer Header

There are 2 sites: http://www.site1.com http://www.site2.com http://www.site1.com contains link to http://www.site2.com as <a href="http://www.site2.com/">link<a/> When user clicks ...
4
votes
4answers
537 views

Is silverlight and Java running on the web browser capable of saving “state” into the user's local machines?

I am aware that even after we have cleared our cache and cookies, websites can still save files/information into our computer using Flash (Flash ever cookies), I was wondering does other plugins like ...
4
votes
2answers
507 views

Can one get infected through visiting a site with a PHP script on it and if yes, how?

I can imagine a clientside JavaScript that gets executed in a vulnerable browser to do some harm, but how can this be done with PHP? Since it's serverside it shouldn't have access to the visitor's ...
4
votes
3answers
480 views

Are there security (esp. privacy) benefits to deleting cookies?

As the title says, I'm wondering if there are any security/privacy benefits to managing cookies - that is, managing by deleting cookies you don't want or need. I deleted all my cookies about a week ...
4
votes
4answers
211 views

Attack where browser URL appears valid

I remember reading about an attack where the "location bar" in a user's browser displays a valid URL (e.g. https://www.paypal.com/), but the traffic is really being directed to or intercepted by an ...
4
votes
1answer
590 views

SSL, SSH, OPENVPN, etc which one?

To start with I am not a security professional, in fact I am on the other end of the spectrum. In the opinion of people on this site what would you choose for secure internet browsing. I will be ...
4
votes
4answers
1k views

Is online banking more secure on iOS than a desktop computer?

Does Apple's iOS provide a more secure environment for online commerce (banking or shopping) than Windows or Mac OS X? Since the only software that can run on iOS must be vetted by Apple, the ...
4
votes
1answer
3k views

cookie path protection within same domain

The answer to this question about how cookies are potentially vulnerable between sub-domains sparked my curiosity. As far as I know, if a cookie is set on a sub-path of the same domain ...
4
votes
3answers
510 views

In what way is a partially encrypted webpage insecure?

What are the potential vulnerabilities that might arise if a webpage is only partially encrypted. I can think of 2 possibilities: You can change the non-encrypted parts of the page (HTML, CSS, ...
4
votes
2answers
2k views

Does Java applets reveal the real IP address, even when using proxy or vpn?

Can a Java applet reveal the original client IP address, when browsing through a proxy or a VPN? Why?
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1answer
196 views

How will users know if their session is DNSSec protected or not?

There is definite security value in having DNSSec-verified connections, however I have yet to see software indicate if the connection is secure. Ultimately I would like my users to recognize that ...
4
votes
1answer
408 views

How did my homepage get changed in IE?

I have rarely used IE in the past. I just use it to test how a website looks. Today all of a sudden when I went on to open IE, it opened with a homepage that wasn't set by me. It was an address of a ...
4
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2answers
187 views

Is using a “Red” and a “Green” browser to balance LOB requirements and security a good approach?

I currently work in a manufacturing company with round about 5000 computers and 6000 employees. We use a lot of web based line of business applications (all internal, non over the Internet) in order ...