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.
2
votes
6answers
214 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 ...
2
votes
2answers
79 views
Security of viewing a website containing Java applets offline
I've been wondering whether viewing a website offline increases the security risk.
The reason why I'm asking is that having been a short time java applet developer (for a small task) I've come to ...
3
votes
2answers
63 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 ...
4
votes
2answers
839 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?
11
votes
3answers
1k views
How can I prevent tracking by ETAGs?
An ETAG is a HTTP header that is sent-behind-the-scenes between a web browser and an web server. This value is intended to control how long a particular file is cached on the client side.
There is ...
-2
votes
0answers
31 views
Sucuri - False Positive with Domain Web Forwarding? [closed]
Similar to the following question:
Sucuri giving false positive with their free online scanner because of an .htaccess RewriteRule
Client has the following domain:
buildingflathead.com
which ...
2
votes
1answer
146 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 ...
4
votes
1answer
96 views
Resources/materials for implementing secure web services?
I'm implementing a REST-style (note: it needs to be more pragmatic than canonical) web API and I would like to secure it. The language I'm using is rather fresh and doesn't have a lot of high quality ...
2
votes
4answers
287 views
If someone steals my laptop while I'm logged in, how can I protect my browser?
My question has its roots in an xkcd from this week:
http://xkcd.com/1200/
Isn't this true and ironic? We place so much emphasis on browser security and OS security -- and rightly so -- yet if I ...
3
votes
2answers
194 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 ...
3
votes
1answer
296 views
Apple Developer Account Hacked?
I just did a fresh install of Snow Leopard on a newly-formatted hard drive.
Logged into the iPhone Developer Page with Google Chrome (latest build) here:
...
2
votes
4answers
221 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 ...
-1
votes
2answers
129 views
How web browser can shutdown computer [closed]
I would like to deverlop one web application, enduser can configure shutdown computer when task has completed, i have search via internet but i have nothing to complete that.
Web browser can ...
4
votes
1answer
121 views
How can browser select suggestions for my private searches?
I use a VPN service that provides a pool of IP addresses, I clean history/cookies/etc - all the browsing data before a session.
Regardless, when I type in the search of one particular search engine, ...
1
vote
1answer
140 views
Using a Web Server to steal NTLM credentials
I am trying to design an attack vector against an organization in which the pen tester (myself), steals NTLM credentials through HTTP. I am thinking of these scenarios:
1- I set up a web server on my ...
4
votes
1answer
69 views
Signing a browser extension
I want to make a browser extension available to users. Can I sign my extension so that users can verify it is authentic, without needing to trust the web site where they got the extension from nor ...
3
votes
4answers
277 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 ...
5
votes
4answers
3k 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 ...
-3
votes
1answer
110 views
What keeps Facebook information safe from botnets and infected computers?
I've read a few articles which suggest that somewhere around 30-50% of PC's are infected with malware. Supposing that means that hackers then have control of those computers to do as they please (root ...
10
votes
3answers
339 views
What bad coding practices makes a browser extension vulnerable?
I'm trying to scan JavaScript files for vulnerabilities using JSHint. Specifically, I'm scanning the JavaScript files of browser extensions. To look for possible vulnerabilities I'm looking for bad ...
10
votes
2answers
199 views
What should I look for when auditing a Browser extension / plugin?
I've been asked to do a security audit on a cross-browser plugin for desktop browsers developed by a third party. I am a web developer with a reasonable grasp of Javascript but am not a browser ...
4
votes
2answers
111 views
JInitiator is obsolete and I should reject it on grounds of security, right?
I'm getting a lot of flack and resistance from developers for not allowing a large (200+ users) roll-out of Oracle's JInitiator (http://www.oracle.com/technetwork/testcontent/jinit-084453.html) as ...
11
votes
2answers
182 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., ...
8
votes
2answers
139 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?
4
votes
3answers
214 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 ...
10
votes
7answers
793 views
How to browse the Internet safely?
What is the best way to browse the Internet safely? By safely I mean:
anonymously
having encrypted communication
Extra bonus for:
being able to do it with little or no performance impact
cheaply ...
1
vote
1answer
61 views
1
vote
1answer
130 views
What is the “about:blank” context for browser security and privacy?
This blog is describing a way to hide the referer header in various situations. Specifically he is referring to things that run in the about:blank context.
What is the about:blank context?
How does ...
1
vote
1answer
171 views
bypass a regex filtration to perform an xss attack
Does the regex [\w/$!.*-]+$ stop the injection of payloads like :
"><script>alert(4)</script>
" onload="alert(4)"
...
0
votes
1answer
60 views
undetectable virtualization apps to spoof web browsers [closed]
monitoring web pages for malicious iframes (root kits) without VM is not safe. when its possible to detect virtualization just by javascript, which software provide undetectable VMs ? QEMU is safe?
4
votes
4answers
5k 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.
...
1
vote
1answer
73 views
Browser cache, cookies, active logins and other data
This question is regarding common browsers, even though I may refer to Firefox settings. Not IE though, I wouldn't expect that to be in any way secure.
I'm seeking to know how secure it is to let the ...
2
votes
1answer
86 views
Detecting Virtualization from web browser
is that possible active adversaries who injecting malicious iframes (root kits), without Flash, Java or any other plugin detect that we using virtualization by javascript or timing differentials and ...
1
vote
2answers
90 views
How do browsers know which cookie to get?
I tried writing a script that would display the contents of a cookie set by another website but it didn't work.
<?php
echo 'Website cookie is '.$_COOKIE['locale'];
?>
But I get an undefined ...
1
vote
1answer
51 views
Java applet authenticity problem
I implemented an applet in java to authenticate users at my website by the usage of MIFARE cards and everything is working good. However I am concerned about the applet's authenticity, in other words, ...
1
vote
1answer
70 views
generating RSA keys through the browser
HTML5 has the element that sends an SPKAC to the server (as I understand it).
But how do you do it in IE?
One CA's websites gives me the following prompt:
This Web site is attempting to perform a ...
-1
votes
2answers
212 views
Restore session in Firefox
Restore session in Firefox
What does this mean, is it related to the session concept which is stored on the web server?
If I stop the computer with my web-app, and then start it again before the ...
3
votes
4answers
209 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. ...
1
vote
2answers
59 views
Where are the private keys stored in Persona/Browser ID?
I'm trying to understand where the private keys are stored in the Persona system, and how they are protected.
Can anyone elaborate on where the crypto material is created, stored, and what is ...
2
votes
1answer
391 views
How does DHE-RSA-AES256-SHA compare to RC4 as the Cipher for SSL?
I read a lot of issue [1] currently stating that RC4 is broken and is at risk.
I just checked my web server (nginx) and it is using the default settings, which is
DHE-RSA-AES256-SHA
How does this ...
7
votes
1answer
212 views
Device fingerprinting & Mass Computer Surveillance
Device fingerprinting is one of the biggest privacy problems as explained because people think cleaning cookies, using proxy servers or blocking domains can protect them (when blacklisted trackers ...
3
votes
5answers
298 views
Does the padlock on my browser really indicate a reasonable assurance against eavesdropping?
I know that there have been broken or weak SSL implementations. Do browsers actually have decent standards for what they'll accept and display "the padlock"?
Furthermore, are there any practical ...
5
votes
2answers
157 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 ...
8
votes
2answers
641 views
Why do Chrome plugins need access to 'all my data' and 'browsing activity'?
Often I install simple add-ons for Google Chrome. However, they almost all need what appears to me as excessive access to my data. For instance, I install a plugin that allows me to click on any part ...
10
votes
3answers
294 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 ...
3
votes
1answer
942 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 ...
6
votes
3answers
304 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 ...
2
votes
1answer
68 views
Return AWS signature over HTTP
I am performing multipart upload to S3 straight from the browser, i.e. bypassing my back-end.
My JS code sends a hand-shake request to S3 (a POST), then uploads the file in chunks of 5MB (a PUT for ...
4
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 ...
4
votes
3answers
143 views
Is there any way I can block (or conditionally approve of) iFrames on the client side?
Given that iFrames are used in many common exploits, I'd like to conditionally disable iFrames except for sites that require it such as GMail, or MasterCard SecureCode.
I also suspect the ...
