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.
5
votes
4answers
80 views
IMG tag vulnerability
Is it safe to display images from arbitrary domains? I.e. let's say I have an image on my page:
<img src="http://badguy.com/image.gif" />
What if image.gif will return some js attack vector, ...
2
votes
2answers
89 views
Identify code being run on website
I do not normally deal with internet security problems but this one has got me interested.
The issue is with a specific site, lets say test.com, and how it it visited.
If the address is typed ...
12
votes
5answers
765 views
Is Google Chrome a better secured browser?
I was amazed that IE 8, Safari, Firefox were hacked so fast. Is it really Chrome so good or it was not tested?
Has anyone other results of independent investigations about security of web browsers?
...
6
votes
2answers
243 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, ...
5
votes
1answer
174 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. ...
4
votes
1answer
216 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 ...
8
votes
2answers
1k 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 ...
2
votes
6answers
216 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
83 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
64 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
857 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 ...
3
votes
1answer
152 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
104 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
298 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
204 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
299 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
234 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
131 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
122 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
142 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
285 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
4k 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
346 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
203 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
121 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
183 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
141 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
218 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
797 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
63 views
1
vote
1answer
133 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
189 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
62 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
83 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
87 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
91 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
72 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
215 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
213 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
443 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
219 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
302 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
158 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 ...
