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53
votes
4answers
106k views

Google Chrome “Your connection to website is encrypted with obsolete cryptography”

Google Chrome is showing new information in the certificate section. Is this a big deal? If so how can I fix it on the server end? EDIT: Thanks for the answers but I'm not skilled in cryptography ...
33
votes
5answers
6k 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, ...
15
votes
1answer
6k views

Why would Chrome not display a padlock icon at all on an SSL site?

I have an internal website running on SSL, but when going through it in Chrome, I don't get a padlock icon at all: However, clicking it does show that the site is encrypted. There are a bunch of ...
174
votes
3answers
30k views

Don't understand how my mum's Gmail account was hacked

My mum (on Gmail, using Chrome) received an email from a friend's Hotmail address. She opened the email (very obviously a phishing email) and clicked a link in it. This opened a webpage with loads of ...
145
votes
4answers
90k views

What exactly does it mean when Chrome reports 'no certificate transparency information was supplied by the server?'

When visiting Gmail in Chrome, if I click on the lock icon in the address bar and go to the connection tab, I receive a message 'no certificate transparency information was supplied by the server' (...
21
votes
3answers
1k views

Are official browser add-ons really safe?

Almost any browser addon/extension that I install on my Chrome or Firefox (be it Firebug, RESTClient, ...) warns me, saying: It [the add-on] can: Access your data on all website Access ...
20
votes
2answers
7k views

Worst case scenario, what can a Chrome extension do with “Your data on all websites” and “Your tabs and browsing activity”?

Chrome extensions, and just like other browsers, appear to often get quite some extensive access to your browser data. In fact, most extensions I've installed require access to: Your data on all ...
18
votes
6answers
3k views

Is Google Chrome a more secure browser?

I was amazed that IE 8, Safari, Firefox were hacked so fast at Pwn2Own 2010. Is Chrome really so good or was it not tested? Has anyone other results of independent investigations about security of ...
15
votes
4answers
9k views

What Trusted Root Certification Authorities should I trust? [duplicate]

After two recent Slashdot articles (#1 #2) about questionable Root Certificates installed on machines, I decided to take a closer look at what I have installed on my machines. (I use current versions ...
17
votes
4answers
23k views

Remove RC4 from SSL/TLS ciphers in Chromium

Recently I started to live without RC4 within my Firefox session. Discussion about it can be found here. While it is quite easy in Firefox (Enter about:config and then rc4), I found no possibility to ...
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 ...
15
votes
2answers
2k views

Why do Chrome extensions 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 an extension that allows me to click on any ...
6
votes
3answers
74k views

HTTPS icon red and crossed out - Chrome browser

What does it actually mean when the HTTPS icon is red and crossed out in Chrome? Does this mean that the site is vulnerable to a Man in the Middle Attack? Is it safe or not?
4
votes
3answers
16k views

Chrome showing cryptography as 'obsolete' [duplicate]

Similar to this question, Chrome is showing the connection cryptography as obsolete. Opera, IE and Firefox seem perfectly fine with the connection. My guess would be the message authentication is ...
6
votes
4answers
6k views

Man-in-the-middle Blue Coat proxy SSL or what?

I have just discovered that my workplace has enabled some new features in the Blue Coat network proxy. It seems like all HTTPS certificates in Chrome on Windows are being issued by this internal ...
4
votes
2answers
247 views

How do I protect my passwords from WebBrowserPassView?

I just got shocked with what can be achieved with WebBrowserPassView. It basically shows every password I've saved in my browser (Chrome). I guess other users on my PC could get my passwords that ...
7
votes
2answers
6k views

Obsolete cryptography (SHA1) warning although certificate uses SHA256

I ordered a certificate with SHA256 from Comodo and was wondering why Chrome shows this message: Your connection is encrypted with obsolete cryptography. The connection is encrypted using ...
3
votes
1answer
2k views

Is bit.ly a malware distributor?

I clicked this link http://girlsguidetosurvival.wordpress.com/ Chrome gave me this warning - Attackers currently on bit.ly might attempt to install dangerous programs on your computer that ...
17
votes
2answers
7k views

Securing Google Chrome Browser against the Logjam exploit on Windows

Is there a way to fix Chrome against the Logjam TLS exploit on Windows? I have updated my Chrome to the latest version yet the https://weakdh.org/ website warns me that "web browser is vulnerable to ...
8
votes
3answers
711 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 ...
8
votes
1answer
2k views

TLS 39 month certificate limit and Chrome's NET::ERR_CERT_VALIDITY_TOO_LONG error

Late last year the CA/Browser Forum decided to limit the maximum valid term of TLS/SSL certificates issued after 1 April 2015. After this time, as the official guidelines put it.. CAs SHALL NOT ...
5
votes
1answer
500 views

Regarding Windows password and Chrome's 'Remember password' Feature

Google Chrome browser helps in password management by prompting users to remember their passwords for the websites. These saved passwords can be accessed from the browsers "settings" menu, and to do ...
7
votes
1answer
564 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 ...
5
votes
3answers
216 views

Is my Google session safe when my computer is logged out or locked?

I've recently uploaded all the family photos to my Google Drive account. I have a strong password and 2 step verification enabled on my Google account. My home computer is (naturally) trusted and ...
4
votes
1answer
1k views

Different SSL states as seen by Safari, Chrome and Firefox

Today, I visited some sites of the German DHL group. While Chrome and Safari complain about an invalid certificate of Firefox accepts it. Which one is right, which one is wrong? Which decision ...
4
votes
2answers
45k views

What is s3.amazonaws.com, and why is Chrome blocking it?

Lately, whenever I click on a download link in Google Chrome, it redirects to another link starting with s3.amazonaws.com, which in turn gets blocked either by Chrome or by my Antivirus (Comodo ...
3
votes
2answers
279 views

Chrome: Found a crash, is it a security vulnerability?

I have been able to make Google Chrome crash, and I was wondering if there are tools or heuristics to determine whether or not the crash is a security vulnerability. How can I determine if a Chrome ...
3
votes
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
votes
2answers
89 views

SSL browser session keys

I am trying to export/write the SSL master secret and keys to a file from the chromium browser. I would appreciate if someone could advice me how to do this. To write the premaster secret we can ...
6
votes
1answer
315 views

How do I securely embed an <img> tag using a user-given URL?

If I hypothetically wanted to allow users to use an avatar from an arbitrary URL like this: <img class="avatar" src="{user input}" /> There are many problems that I can think of: There are ...
4
votes
1answer
366 views

Different SSL cert behavior with Chrome on desktop vs. Chrome on iOS

We have a website, https://uk.care.com, that has a GeoTrust multi-SAN cert on it. The cert is up-to-date, using SHA-256, TLS 1.2, etc. When we view the site in Chrome on various desktop systems it ...
3
votes
7answers
1k views

Chrome vs Explorer - how to explain in plain words that open-source is better?

Why open-source is better in plain words? Yesterday I had a talk at a DIY bicycle workshop. There is a PC (running XP) that main application is checking emails (nothing really serious). I found it ...
0
votes
1answer
240 views

Chrome + EMET= How Strong Realistic Protection Against Browser-Based Threats?

tl;dr: How secure is a combination of a sort-of hardened Google Chrome + Microsoft Enhanced Mitigation Experience Toolkit 5.1 against browser-based threats that I do not expect to be highly ...
0
votes
1answer
225 views

Can IE be made to imitate the behavior of Chrome's KeyGen element?

Is there any way I can repurpose existing ActiveX controls or functionality to get IE to work with the KeyGen element? Assistance getting Safari to work with this optional HTML5 spec would be ...