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

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 ...
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5answers
1k views

Websites that interactively test browser security (XSS, CSRF, Javascript, etc)

I'm looking for a comprehensive list of browser test sites so that I can visually prove that the browser is patched and configured for safe web browsing. My intent is to know what risks may exist ...
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2answers
1k views

MIME sniffing protection

As it is known, older versions of MSIE (before 8) have a nasty habit of treating images as HTML if they "look like" HTML, which can lead to nasty vulnerabilities for sites that allow people to upload ...
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2answers
422 views

How to keep using Java 6 securely, despite its unpatch vulnerabilities

Given that Java 6 is now deprecated by Oracle and there recently has been notification of a 0day (that will exist forever now that Oracle is not patching JRE6), what can we do to prevent drive-by ...
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403 views

What steps do you take to keep both your computer and internet browsing secure?

I am thinking about your browser setup, antivirus protection, vpn, browsing best-practices and so on.
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163 views

Preventing user supplied javascript from posting to external server

I am writing an internal tool that will support plugins written by other developers. Ideally, these plugins would have a Javascript component to allow people to make widgets. Some of the pages these ...
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312 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 ...
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6k 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 ...
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1answer
534 views

Are browser still vulnerable to Cross-Site Cooking?

The latest article that I have been able to find about Cross-Site cooking was stating that it was possible to set cookie on 2 dots top level domain such as .co.uk. The mechanism for preventing ...
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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 ...
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361 views

How big is the risk, to enable scripting in the Web browser?

While browsing the web, many websites executes scripts (mainly javascript) that are executed without the user noticing. How big is the risk, to get Malware unnoticed while surfing with scripting ...
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437 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 ...
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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 ...
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289 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, ...
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31k views

How to determine if a browser is using an SSL or TLS connection?

I want to know whether my browser is using SSL or TLS connection if I see HTTPS. I want to know for IE, Firefox, Chrome and Safari. I want to know the protocol version.
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How does BeEF work? (working understanding)

I have recently come across the BeEF- a browser exploitation tool. In most of the articles, it is said time and again that it is developed for research and pen test purposes! Has anyone worked with ...
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SQL Injection How to inject Clean/Rest URLS

I have a question I'm hoping you could help me with? Unclean url's: http://example.com/index.php?page=foo http://example.com/products?category=2&pid=25 ...
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3answers
386 views

Is it advisable to have a web browser remember login credentials?

I have a really long random password for my cellphone account and have it written down in a safe place. I only use it once a month and am considering having my browser remember it. Would there be any ...
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2answers
6k 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 ...
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4k 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 ...
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1answer
6k 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 ...
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5answers
750 views

Can I improve website security by storing SSL Keys in DNS? Is DNSSec required? Are threat models available?

In light of recent attacks on SSL/TLS communication, people have been asking about ways to improve the security of SSL webserver communication. Several great solutions have been mentioned in the ...
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2answers
636 views

Browser based virtual machines

How would applying hypervisor (e.g. xen) principles in the development of a web browser offering isolated browser tabs (virtual machines) improve or reduce security of existing web applications (good ...
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165 views

What security measures does Chrome have in place to sandbox different user accounts?

Google Chrome has a feature that allows different users to use Chrome on the same computer in a completely separate space. The support page is quite light on information. Is there information ...
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Are Web Views in android secure?

"Web Views" are views that display some online content, usually a webpage within an android app. Implemented "Web Views" usually don't seem to have any kind of status bar or an address bar to confirm ...
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1answer
773 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 ...
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Do I really need all these Certificate Authorities in my browser or in my keychain?

There are lots of strange looking Certificate Authorities in my keychain as well as Firefox. I am sure they are legitimate CAs (as they are the same on my Mac and PC and other computers I checked). ...
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225 views

Are there any reasons why browsers should block mixed passive content by default?

Most browsers block "active" content that's being loaded over HTTP on HTTPS pages. This includes stuff like javascript which can be modified with an MITM and compromise the security of the entire ...
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307 views

What's the real reason behind blocking the social sites? Even legitimate sites like twitter which acts as a knowledge repository?

I see some sites are blocked for IT security at schools, colleges and offices. But, why do some obvious good sites are blocked too?
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4answers
421 views

What abuses can an infected webpage do to me if I'm using Chrome and Flash is disabled

as a follow-up to this question Can you get virus just by visiting a website in chrome., I've read these pages: http://www.straightsectalk.com/?p=47 ...
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3answers
278 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 ...
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4answers
5k views

Is WebGL a security concern?

Is WebGL a potential security problem due to the low level access it provides? For example, a web page can attempt to compile and run any shader source it wants. It seems that security would ...
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2answers
230 views

plugins to lengthen short urls for security purposes

Came across this question What browser plugins can help us to see the actual destination of such shortened URLs?
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How can a “server” know that what browser i'm using besides the user-agent?

How can a "webserver" know (or a sniffer between the srv<->and the client) that what browser i'm using besides the user-agent? Are there any "magic tricks"? javascript? java? How can I securely, ...
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519 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 ...
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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 ...
6
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2answers
526 views

Firefox Add-ons not using HTTPS? Security bug. (?)

If I add a rule in Privoxy: echo '{ +redirect{s@http://@https://@} } .mozilla.org' >> /etc/privoxy/user.action then I can't install Firefox Add-ons. Why? I though the Firefox Add-ons ...
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3answers
2k views

Any additional security with large blacklisting hosts file?

I run Windows with a pretty hefty c:/windows/system32/drivers/etc/hosts file obtained from http://winhelp2002.mvps.org/hosts.htm. I update this file as regularly as I remember and layer it with ...
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1answer
626 views

Access to other local files from a local HTML file

I tried this question on programmers site with no luck Do you see any reason to block a local html file from accessing another local files located in the same folder? I mean, if a user downloaded an ...
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3answers
936 views

Is it possible to use Greasemonkey to hack a website?

Yesterday my WordPress website got hacked. I thought I had done all necessary things to make it secure. One of my colleagues said that with Greasemonkey we can easily hack sites. Is it true? How can I ...
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3answers
1k 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 ...
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4answers
373 views

Is flash or javascript a bigger security concern?

Many flash website whitelisting extensions for chrome (such as flashblock and flashcontrol) use javascript in order to selectively block Adobe Flash from functioning. Thus, In order to get this ...
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2answers
1k views

Considering that SRP is better than SSH and Basic Auth, how can it be implemented in a website?

SRP is short for Secure Remote Password protocol, and provides a better way for passwords to be sent over the internet. I've read the information at it's Stanford University home page, the Wiki ...
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3answers
880 views

Any browser that supports script-nonce?

I was trying to include script-nonce on my html file, but seems like none of the current browsers support it. Is anyone aware of any version of any browser that supports this functionality? I'm ...
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4answers
16k views

Advanced techniques for detecting a proxy/getting original IP

In what manner can a website detect my original IP address, even though I'm using a proxy server? I've noticed this with a few sites. There are four proxy methods I've used: Firefox with a proxy ...
6
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3answers
1k 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 ...
6
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1answer
388 views

How do I check the code of a Chrome extension to make sure it's not stealing my info?

I've been reading more and more about just how much access browser extensions can have to your data. This is a little unsettling, so I'm curious if there is a way to Vet these extensions and make sure ...
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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 ...
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2answers
1k 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 ...
6
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1answer
450 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 ...