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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12
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2answers
478 views

How do you visit a link without risking your computer?

I got a link from: http //61.19.247./~naowit/dustin.html (removed the last digits so you don't accidentally click it! (they were 192)), which was masked as a youtube.com link via email. Now I'm not ...
12
votes
2answers
408 views

Why do browsers allow public websites to attack intranet sites?

When I'm visiting a website on the public internet, the website can cause my browser to send requests to a local IP address (such as 10.0.0.1). This can be used to attack internal web sites, e.g., ...
12
votes
2answers
1k views

Any tool for scanning vulnerabilities in browser extensions?

I am scanning browser extensions of Chrome and Firefox for vulnerabilities. Is there any tool which would help me do this?
12
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3answers
598 views

Is it inconsistent to tell users to “not click on password links in email”, and requiring clicks on “forgot password” links?

On one hand, IT Security shops have been telling users to not click on links in email because they can do damage to your computer, or phish your personal information. Many of those issues are ...
12
votes
1answer
2k views

SSL TLS renegotiation vulnerability - current situation in clients

Reading about the SSL renegotiation problem CVE-2009-3555 one knows that servers supporting old type of renegotiation are vulnerable to data injection. We also have tools to test them (openssl ...
11
votes
5answers
2k views

Why do most browsers store browsing history by default?

Why do most browsers store browsing history by default? It seems like people often have to go to the hassle of manually deleting their history or using incognito mode. Are there some major advantages ...
11
votes
11answers
8k views

Besides IP addresses, how else could one be identified? [closed]

OP: I'm curious how else an actor seeking to identify someone online could accomplish this task besides just using an IP address. What methods would they employ? What knowledge must they have of the ...
11
votes
2answers
2k views

How can I hide my logged in sessions from other websites?

Most people go on browsing the web while connected to their facebook/gmail/etc. accounts. Other websites somehow know what accounts you're logged in. For example, if you go to hide.me's torrent page, ...
11
votes
3answers
398 views

How to test if a browser add-on is safe

I came across this plug-in that started some alarm bells ringing. The add-on would help submit a website to web directories. The first 100 submissions are free, then you need to pay $20 via pay-pal (...
11
votes
2answers
1k views

How safe is it to use developer's version of the browsers [closed]

I have heard that the developer versions of browsers (chrome and firefox) are less secure than stable versions of them. Is it true? Is there any sense in using developer editions of browsers for ...
11
votes
1answer
11k views

Does Google Chrome protect against cross site scripting (XSS)?

In Firefox I've been using the NoScript extension to protect myself from certain kinds of malware attacks. NoScript is well known as a very powerful extension for Firefox and introduced protection ...
11
votes
2answers
718 views

Risks of Using Google Native Client

I was wondering if there were any possible risks in using Google Native Client. I know it is sandboxed, but the idea still seems risky, and at least leaves another route open for compromising your ...
11
votes
1answer
2k views

Browser password manager vs third party password manager

How usable and secure are 3rd-party password managers like Roboform, Lastpass, and 1password from the built-in Chrome and Mozilla password managers? What are the advantages of using 3rd-party password ...
11
votes
3answers
8k 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 ...
11
votes
2answers
201 views

Disable HTML5 battery features

HTML5 has a feature set relating to client battery status. It has been described as a privacy hole, as it can be used to track and identify web users. Research suggests the features can be used even ...
11
votes
3answers
466 views

How will SHA1 deprecation affect internal CA's?

I am hearing that the SHA1 Deprecation notices from MS/CHROME only apply to certs that are a part of a public trusted root program. This makes one believe that IE will have new logic built in to allow ...
10
votes
2answers
1k views

Should user be allowed to save password in browser?

The auditing company found a bug "The Auto-complete form attribute is set in password field". They suggested to disable autocomplete for this field to prevent disclosure of it "when working on shared ...
10
votes
4answers
4k views

I've encountered JavaScript attack code - how do I search for information on the exploit's specifics?

So, I clicked on a reasonably-looking LinkedIn invite, not thinking about hovering overing the link first, since usually the e-mail client warns me about such things. Once I realized I landed on an ...
10
votes
3answers
508 views

Should I ask a user to re-authenticate if the browser thumbprint changes? Is a server side library available?

Is there a security benefit to using the browser's thumbprint in addition to a session identifier to identify a unique session? Would it then be advisable to ask the user to reauthenticate (or simply ...
10
votes
1answer
7k 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 (www.example....
10
votes
2answers
4k views

Are there any statistics about webservers and browsers TLS support?

From Hackers break SSL encryption used by millions of sites: The vulnerability resides in versions 1.0 and earlier of TLS, or transport layer security, the successor to the secure sockets layer ...
10
votes
4answers
4k views

My ISP is injecting strange codes to every website I visit

Here's the code at the bottom of every page: <script type="text/javascript">if(self==top){var idc_glo_url = (location.protocol=="https:" ? "https://" : "http://");var idc_glo_r = Math.floor(...
10
votes
3answers
389 views

Do I have to harden IE if I'm only using Firefox?

Assume a Windows 7 system (probably whatever home version comes with the machine), with the latest OS patches, latest IE and latest Firefox. Also assume that the user uses only Firefox for browsing, ...
10
votes
3answers
312 views

Are bookmarklets safe with facebook data?

I usually play Mafia Wars and use bookmarklets like Spockholm, Arum, etc. Can these bookmarklets get my Facebook data when I run them, they usually ask to unframe the Facebook page? I was just ...
10
votes
2answers
8k views

How to thwart sslstrip attack?

I need help understanding the dynamics of an sslstrip attack. I'm using it to test the security of a site that I own. I can successfully sniff the victim (in this case, myself) credentials over the ...
10
votes
2answers
2k views

How to improve the security and privacy of Firefox

What would be a sensible approach to enhance the security and privacy of Firefox? I did not find a question about this and I feel that some guidelines for casual web users would be handy. Currently ...
10
votes
2answers
3k views

How to protect against clickjacking attack but allow legit iframes?

I'm aware of modern anti-clickjacking approaches, such as X-Frame-Options header or framekiller scripts. But all these tactics prevent content to be inside iframe. But what if there is a requirement ...
9
votes
5answers
4k views

Is finding vulnerabilities in the major browsers easy or not?

If young hackers can detect them, why can't security analysts get and patch them? Also, I dream of finding a vulnerability in a major software, like IE or Chrome. Is it easy? Is it systematic or is ...
9
votes
6answers
39k 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 ...
9
votes
2answers
267 views

Why do some certificates specifically identify a corporation and most don't?

Looking at a handful of websites that allow for/require HTTPS, I realized that the certificate for a few of them specifically identifies the owning corporation, but some (most) don't. What's the ...
9
votes
1answer
761 views

XSS Technique - & JavaScript Include

I was looking through the OWASP XSS Filter Evasion Cheat Sheet, and there was one technique that was completely new to me: & JavaScript includes <BR SIZE="&{alert('XSS')}"> I ...
9
votes
2answers
628 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 ...
9
votes
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 ...
9
votes
3answers
2k views

localStorage for apps over https. What expectations are there?

I run an online gradebook. To keep student data private, I transfer all data over https. Now, I'd like to use localStorage to avoid redundant calculations and server requests. However, according to ...
9
votes
2answers
880 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 ...
9
votes
2answers
4k views

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 ...
9
votes
1answer
1k views

How is YouTube able to identify anonymous users?

A few days ago I was searching YouTube and I noticed an "outlier" video poped up in the suggestions list. This video had nothing to do with the topic being searched, but instead it was based on a ...
9
votes
2answers
176 views

Secure Flash with click to play plugins in the enterprise

In the light of recent repeated critical Flash vulnerabilities there are recommendations to use browser plugins like click-to-play to prevent unnecessary Flash content from automatically loading with ...
9
votes
4answers
2k views

Web browser password management security [duplicate]

Possible Duplicate: How are browser saved passwords vulnerable? How secure are the password managers that are built into modern web browsers? Currently I use lastpass plugin as I believed the ...
8
votes
5answers
3k views

What do the various browser “private modes” do?

Recently there has been some disagreement as to what "private mode" means when it comes to various browsers. Primarily I am referring to... IE's "InPrivate Browsing" Google Chrome's "Incognito ...
8
votes
9answers
449 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 ...
8
votes
3answers
609 views

How secure is HTTPS with weak ciphersuites?

Today I came across the website https://mtgox.com/, which claimed to be secure because of the Verisign certificate. I checked the certificate out of curiosity (it's the first thing they claim, let's ...
8
votes
5answers
3k 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 pose a threat even if the person is using a secure application layer protocol? What I mean by ...
8
votes
3answers
1k views

Are secret URLs secure over HTTPS?

Imagine a service that makes sensitive information available under a secret URL via HTTPS only, without requiring any other authentication. In fact, these are already widespread. What level of ...
8
votes
4answers
4k views

What web browsers support OCSP stapling? Are the privacy and performance features the same?

OCSP stapling decreases the load on a PKI infrastructure's OCSP server by attaching a signed OCSP response to the target in a TLS connection. In addition it creates a more secure/private session ...
8
votes
3answers
2k views

If I never want cross origin requests to be accepted, can I just ignore CORS?

The CORS spec states that if a request method and headers are not simple then a preflight HTTP OPTIONS request is sent to see if the request is allowed by the server. My server does not respond with ...
8
votes
2answers
2k views

Will disabling the Java add-on in IE protect you from Java exploits?

Concerning the recent Java vulnerability (Should I be disabling Java?), the most common advise seems to be to disable Java plug-ins in the browser. However, Heise Security suggests that, when it ...
8
votes
1answer
2k 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?
8
votes
5answers
429 views

Threat model for huge warnings on untrusted SSL certificates and no warnings for plain HTTP connections? [duplicate]

Why do untrusted/expired SSL certificates get such a huge warning in modern browsers even with "DO NOT VISIT THIS SITE!" messages, whereas a regular HTTP connection, which is more prone to ...
8
votes
3answers
748 views

Why do Firefox and Chrome “leak” critical security information out of the browser and how can I stop it?

In studying SSL / TLS handshakes and encryption, I found a method that describes how to export the SSL / TLS session keys from Firefox to an user or environmental variable outside the browser, and ...