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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469 views

How dangerous is a virus introduced to a malicious website in chrome?

I am using Google's Chrome browser under Linux (Ubuntu) 64 bit for web browsing. If I a virus uses for example a leak in the flash player, the virus will get the privileges of the user who started ...
4
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3answers
662 views

Is Chrome in Metro Mode more secure than Chrome in Desktop Mode?

With Windows 8, Microsoft introduces the Metro Apps which run in a sandbox environment, and therefore should be more secure. I would be interested to know if this higher security that the metro apps ...
4
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1answer
178 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 ...
3
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2answers
1k views

How can Bank of America tell that I'm logging in on a computer I haven't used with them before?

When you sign into Bank of America for the first time on a computer that you haven't used with them before, they detect this and force you to answer one of your security questions. I think I've seen ...
3
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7answers
556 views

Can one reliably show HTTPS status in browser (not just the lock in the URL bar)?

I'm almost certain this isn't possible, as it would probably be too exploitable, but I wanted to ask the community just in case. Is there a way to determine and display the state of HTTPS on a page ...
3
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3answers
468 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 ...
3
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4answers
4k views

how can you inject malicious code into an innocent-looking URL?

I am learning about XSS attacks. Wikipedia says that in a non-persistent attack an attacker may provide an innocent-looking URL that "points to a trusted site but actually has an XSS vector." What ...
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 ...
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2answers
2k views

How is it possible that a virus can infect the system if the browser is started with non-admin rights

If I open my web browser (for example firefox) in Windows 7 with activated UAC as normal user (non admin) a virus - which uses a security leak in my browser - will only gets privileges of the normal ...
3
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2answers
536 views

Where do I get started in terms of learning how to exploit Java and Flash vulnerabilities? or browser exploitation in general

Another Java 0day was discovered today which got me thinking how browser exploitation (remote execution on clients browser) works. I am unable to find any books or resources online about browser ...
3
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2answers
1k views

How does the Yahoo webmail exploit work?

I got an email (referring to me by name) from somebody I knew a while ago and the email itself was just two/three lines containing a bit-ly link. Although it seemed like it actually could be ...
3
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4answers
902 views

FireFox's restore previous session restores logins authenticated by server's sessions

In a website I'm building when I login, close FireFox, open FireFox and try to go to the website again I must login again (as expected) BUT if I select "Restore Previous Session" I am logged in again. ...
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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 ...
3
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3answers
255 views

External cross domain include script

One of my web application underwent a vulnerability assessment recently, and one of the findings is about cross domain include script. Our web app uses addthis_widget.js from AddThis to bookmark ...
3
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2answers
2k views

Do most browsers handle mixed encrypted and unencrypted content correctly?

In Google Chrome, when I go to an encrypted page that contains unencrypted content, I get the following pop-down, which allows me to either load or not load the insecure content, making a clear ...
3
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4answers
221 views

Improving the privacy of a casual Web user

I am interested in improving the privacy available to me as a casual internet user with a default browser. I think that Tor is too slow and that the "Privacy Mode" in browsers isn't really practical. ...
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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 ...
3
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2answers
579 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!" ...
3
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2answers
623 views

Risks of serving untrusted content under HTTP Content-Type: text/plain?

Am I gonna run into XSS attacks by doing this, or will a file download be prompted? Are there security problems that would rise in a modern browser?
3
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3answers
295 views

Where's the security when a payment gateway let website handle Credit Card detail

Has anyone worked with eWay payment gateway before? Basically, there's a service endpoint where you post the customer's detail and credit card details from the web application after the browser sends ...
3
votes
3answers
1k views

sslstrip vs. privoxy redirect rule on clients

I watched this video: http://www.securitytube.net/video/193 Now I'm thinking about an example. Suppose I have a privoxy proxy on my PC: user.action file (just part of it): { ...
3
votes
2answers
773 views

Pop-ups in Private Browsing?

The new Firefox private browsing mode allows for both non/private browsing windows at the same time. So if a website pops up a new window (which will be in non private mode) can it read stored data? ...
3
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1answer
249 views

Secure information exchange between web applications using browser redirection

We're implementing a web application (US) that needs to exchange sensitive information with a third-party web application (THEM). The way we'd like it to work is that an end user clicks a hyperlink, ...
3
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4answers
4k views

Is it safe to allow users multiple login at different browsers & computers?

We are currently developing a web application. The developers have allowed multiple login. e.g an user can log-in to multiple computers at the same time. They are quoting Gmail account as an example ...
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3answers
8k views

Browser security - Firefox + NoScript is better than Google Chrome?

I saw that NoScript + Firefox combination blocks all "dynamic content" (especially those spammy ads). I really like that. It reduces the chances of being exploited. But, chrome only asks me to allow ...
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2answers
5k views

Can Cookies Without the Secure Flag be Stolen, even when only accessed via HTTPS?

Is it possible to capture the cookies used by HTTPS site when cookies don't have secure flag set. Suppose the site is https://www.example.com. http://www.example.com does not show up, also ...
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2answers
347 views

Protecting websites from outdated browsers and plugins via a whitelist/blacklist combination?

Aside from using browser headers, I want to blacklist/whitelist browser and plugins from my site so that I can prevent these older unpatched systems from (1) being a general user of my site (2) ...
3
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1answer
65 views

Does a browser have to make multiple requests to verify an SSL certificate chain?

I've learned that SSL certificates can be chained, and the browser will use the issuer's public key to verify the issuer's signature. I have read this article, which has a very helpful diagram, but it ...
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3answers
148 views

When downloading from an https web page - will the download also use ssl?

If I click on a download link on a page that uses ssl, will the download also use ssl? If the answer is not (or: sometimes yes, sometimes not) - is there any way I can force it to be protected? I'm ...
3
votes
1answer
844 views

Can HSTS be defeated?

As I know HSTS is mainly implemented to mitigate famous sslstrip attack in which browser is forced to use ssl when connecting to particular site. And I think it also prevents user to proceed to site ...
3
votes
2answers
73 views

What precaustions should be taken when the file displayed by a webpage is specified by the GET value

My website shows some files based on the get value in the URL. For example http://www.mysit.com/navigate.php?d=firstpage.html The thing is navigate.php knows which folder to look in and it's not in ...
3
votes
1answer
398 views

What is the “derive” key usage?

Google Chrome gives a lot of SSL information. Here is a screenshot: Under "Key Usage", what does "Derive" mean?
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3answers
614 views

How can I protect my browser from being compromised?

In enterprise environments, I have found great benefit to use binary white-listing, web security gateway and end-point AV to help protect the end-user/system. Unfortunately, I still see the browsers ...
3
votes
3answers
152 views

Warn about specific CA in Firefox

Consider a setup where all HTTP/HTTPS traffic goes through a proxy. The certificate of this proxy must be trusted by all browsers (in this case, Firefox). This certificate replaces the original ...
3
votes
1answer
117 views

How does the same-origin policy apply between browser tabs? [duplicate]

Let's assume that we have 2 open tabs in a browser containing page A (A.html, A.js) into the first tab and page B (B.html, B.js) into the second tab and that page A and B have the same origin (scheme, ...
3
votes
1answer
69 views

How can two clicks lead to better security in the context of, e.g., Twitter and Facebook share buttons?

The sharing section of Jedox's webpage has the Facebook, Twitter, Google+ and Linkedin share options in default inactive state. You need to first click it to activate and click again to get the share ...
3
votes
2answers
289 views

Learning XSS: Why is my javascript ignored?

<a href='mailto:</a><script>/*'></a><script>/*</a>: <br> <hr> <a href='mailto:*/location.href=/*'>*/location.href=/*</a>: <br> ...
3
votes
2answers
270 views

On an “uncritical” site, is there any reason to NOT trust a self-signed certificate?

There are many sites that have self-signed ("untrusted" in Firefox) certificates. I then have the option to trust them or not. If I not trust them I can either leave the site or only visit the site ...
3
votes
1answer
107 views

Force user to download a file to their hard drive via hyperlink?

I want to design a scenario in which I have a web site which contains a link. If the user clicks on this link, it will save a file in a specific pat in his hard disk without his consent. Is this ...
3
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2answers
210 views

How can users be sure the browser's URL bar is not faked?

For a user to defend against something like Don't understand how my mum's Gmail account was hacked , they should pay attention to URL bar before typing their credentials. But how can you make ...
3
votes
2answers
490 views

When using private browsing can a website view data stored before private browsing was turned on?

If a browser has been used to visit a few sites and has active logins and then the user turns on private browsing, can the sites still access data such as cookies and cached files that were created ...
3
votes
1answer
115 views

What's malicious about file links?

Why did Chrome and Firefox disallow file:/// links? I can imagine an iframe opening a local resource, but which resource is the scary one? They could have just disabled iframes to file:///? Ajax ...
3
votes
1answer
3k views

Can your Windows or Linux username be exposed to websites?

For example: Accessing a website with javascript enabled can expose information such as browser, fonts and local time. Can it, theoretically, expose your Windows or Linux username? Will saving a ...
3
votes
1answer
21k 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. ...
3
votes
2answers
119 views

Vertical information portal security with a customized web browser

I am creating a SaaS that will be delivered through a Vertical Information Portal (VIP). In my research I have found that by developing a custom lean web browser and installing it on the clients ...
3
votes
1answer
243 views

What servers or clients are immune to related-domain cookie attacks? (*.example.com)

In this question, I want to identify browsers, servers, or implementations that are immune from related domain cookie attacks (e.g. a.example.com vs b.example.com). Lacking any tangible solution, ...
3
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1answer
381 views

What does it mean when a webpage says refresh is disabled?

https://www.grc.com/x/ne.dll?rh1dkyd2: To safeguard your privacy we have disabled the browser's "reload" or "refresh" facility while you are in sensitive areas of our web site. Reloading pages ...
3
votes
1answer
191 views

How can I assess the trust worthiness of a browser add-on?

Having learned a bit more about what add-ons/extensions can do in Firefox, I want to minimize my risk and use some safer mechanism to download videos (FLV in particular) for later viewing. ...
3
votes
4answers
108 views

Do search engines give searcher's IP address to sites that come up in search? [closed]

Ok so for example, I search "stackexchange" and a bunch of pages come up in the search result - of course most of them from this very site, and many other ones talking about stackexchange. Would this ...
3
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2answers
66 views

Why browsers implement stricter policy for local files

I have a problem viewing HTML/JS/CSS files generated on disk. Specifically, several calls in javascript are blocked by Google Chrome. I googled and found an answer here: ...