I started to use Fiddler and I want to be able use it to debug https requests.
I read the part "Configuring for HTTPS Capture" in the
following article: http://www.kleinfelter.com/content/using-fiddler-capture-encrypted-traffic-https
So I decided to change the properties of Fiddler to enable also https requests. I checked both "Capture HTTPS CONNECTs" and "Decrypt HTTPS traffic"
Once I clicked the "OK" button my browser blocked any https requests. Therefore, I couldn't enter any sites with personal information such as Facebook or Gmail. The error message that I got from the browser was:
Your connection is not private
Attackers might be trying to steal your information from
www.facebook.com (for example, passwords, messages, or credit cards).
NET::ERR_CERT_AUTHORITY_INVALID
I probably have to change something in the properties of my browser (Chrome) so I'll be able to submit https requests while fiddler is working. I know it may be unsecure, but once I finish using Fiddler, I'll change it back to its default property.
Do you know what I have to change in my browser?
Fiddler uses its own root CA when acting as a MITM proxy to decrypt HTTPS traffic. This CA is not trusted by Windows (which is good, as Fiddler does not have the authority to issue certificates). Fiddler uses this root CA to create certificates on the fly for HTTPS sites you visit enabling it to decrypt content.
The message you are seeing is Chrome warning you that the issuer of the dynamically Fiddler generated certificate is unknown. On most sites, you can bypass this by accepting the warning but some sites employ additional security practices such as Strict Transport Security (HSTS) and certificate pinning where a browser prohibits you from accepting warnings such as these.
To avoid having browsers show a warning, you should add the Fiddler root certificate to your trusted certificates. IE and Chrome share the same certificate store maintained in Windows, while Firefox maintains its own store internally.
To trust Fiddler's Root certificate,
Click the "Export Root Certificate to Desktop" button in your screen print (in newer versios, this is available behind a button titled "Action" on the same dialog).
This exports the Fiddler root certificate to your desktop.
Open the certificate file and click the "Install Certificate" button.
Proceed with the rest of the prompts to add it to your list of trusted root certificates.
References: https://www.fiddlerbook.com/fiddler/help/httpsdecryption.asp and http://docs.telerik.com/fiddler/Configure-Fiddler/Tasks/TrustFiddlerRootCert
Related
Browser says "Camera Blocked to protect your privacy"
My project include using user camera and when i access application from localhost camera works fine but when accessing through ipaddress, the browser by default blocks the camera and other resource.. how can i allow them for my application.
My application is for an organization who will be accessing the application using ipaddress.
Thank you for reading and your help. :)
type url chrome://flags/#unsafely-treat-insecure-origin-as-secure
Enter url in the textarea
Choose Enabled in the select option
Click image link bellow to see detail
example
Chrome blocks vulnerable features—including camera, location, microphone, etc. on non-secure sites. As of July 2018, with the release of Chrome 68, Chrome starts to mark all HTTP sites as "not secure."
You have three options to unblock these features for your site:
Treat 192.168.10.79 as secure origins by setting chrome://flags/#unsafely-treat-insecure-origin-as-secure. Origins must have their protocol specified, e.g., http://192.168.10.79.
Port forwarding your site address to localhost. Chrome treats localhost as secure origins.
Set up a self-signed certificate for the server.
The problem is because of http protocol. This is not a secure protocol.
Solution
In my scenario I have used https and have got all permissions.
So I chose to use Cloudflare's shared SSL certificate with CDN, now the website I sign up for has this certificate shown in the browser:
The "issued to" domain is not my domain, this caused a problem:
The https post API of my program thinks my website does not have a valid certificate
However, when I open up my site with Chrome browser, the secured icon shows up:
It seems that the browser thinks the Cloudflare shared certificate is OK,
while the "issued to" domain is clearly not my domain
So the question is:
Why does the browser trust the shared SSL certificate with "issued to" not matching my domain, while the WebRequest from a C# program does not trust?
Turns out there is a "Subject Alternate Names" field in the certificate details, which allows browsers to trust certificate with non "issued to" domain, big thanks to #SLaks.
The reason why it didn't work on my C# api access is that Unity does not support ECDH(Elliptic-curve Diffie–Hellman) for HTTPS, and Cloudflare only supports ECDH.
So, the HTTPS api to my server through Cloudflare is working for Chrome, but not working for Unity. I searched around and found it does not work for some versions of Monodevelop lineup and Xiamarin as well.
Bug
I want to use fiddler to monitor api calls made by my browser when it visits some pages.
The technology - Fiddler 4.6x, Chrome 56, Firefox 51, Windows 7 64 bit.
The problem - Fiddler does not work with chrome. When I open any page on chrome, I get the error "Your connection is not private: Attackers might be trying to steal your information from website (for example, passwords, messages, or credit cards). NET::ERR_CERT_AUTHORITY_INVALID". FYI, I easily fixed a similar issue with firefox.
Solutions I tried that failed -
Four hours of google and stack overflow did not give me any solutions.
Convert the fiddler cert to pk 7 ??? format.
Import fiddler cert into chrome. Also, grant the cert all kinds of advanced permissions.
Install the fiddler cert with admin rights on windows, by "running" it.
Run chrome and ignore cert errors.
Regenerating the fiddler cert and restarting fiddler and browsers as given in the official fiddler book.
In 2,3 the cert never appeared in trusted cert store, but appeared in personal and immediate cert store. In 1, nothing even happened. Please tell me how I can make this work. Any links to the basics of all this would help.
I was facing similar issue with Fiddler v4.6 and followed these steps:
Fiddler 4.6.1.5+
Click Tools > Fiddler Options.
Click the HTTPS tab.
Ensure that the text says Certificates generated by CertEnroll engine.
Click Actions > Reset Certificates. This may take a minute.
Accept all prompts
Fiddler 4.6.1.4 and earlier
Click Tools > Fiddler Options.
Click the HTTPS tab
Uncheck the Decrypt HTTPS traffic checkbox
Click the Remove Interception Certificates button. This may take a minute.
Accept all of the prompts that appear (e.g. Do you want to delete these certificates, etc)
(Optional) Click the Fiddler.DefaultCertificateProvider link and verify that the dropdown is set to CertEnroll
Exit and restart Fiddler
Click Tools > Fiddler Options.
Click the HTTPS tab
Re-check the Decrypt HTTPS traffic checkbox
Accept all of the prompts that appear (e.g. Do you want to trust this root certificate)
Reference:
https://textslashplain.com/2015/10/30/reset-fiddlers-https-certificates/
I used these two stack overflow posts -
https://superuser.com/questions/145394/windows-7-will-not-install-a-root-certificate
https://superuser.com/questions/647036/view-install-certificates-for-local-machine-store-on-windows-7
I don't know what is happening. One of these posts worked and I got the fiddler cert into the trusted store. But, fiddler still cannot decrypt many websites https traffic, especially that of google.
After I reinstalled fiddler and did what Abir suggested Fiddler still didn't capture any traffic.
In my case it stopped working because I installed a chrome extension named Tunnel Bear, uninstalling the extension solved it for me.
Firefox has its own certificate store so I assume you just installed the DO_NOT_TRUST... Fiddler root cert there and everything worked. Pretty much you should do the same with Windows certificate store in order for Chrome to work. So make sure you remove all the fiddler certificates you previously generated and regenerate.
if fiddler do not capture chrome traffic, one solution is checking extensions. in my case i use zenmate vpn. when i disable this extension, fiddler capture all traffic in chrome
I'm using Fiddler2 on Windows to inspect and analyze HTTPS traffic. To make it less cumbersome, I've installed and trusted the Fiddler2 Root certificate. The Fiddler root certificate makes the browsing experience seamless; all the HTTPS sites are still "secured" (ie: the url is still https, and you still see a certificate lock).
But this becomes problematic when I forget to turn off Fiddler, and find myself browsing sites that I want to remain secured, only to find Fiddler still logging my traffic/content.
Is there a Chrome extension that I can install/use that would visible show when the HTTPS connection is secured by a certificate signed by a specific root?
Unfortunately, it doesn't look like such information is available in the chrome.webRequest API, which you would need to get it in a Chrome Extension.
There was previously a request to Provide information about the TLS connections to extensions via the webRequest API, but it was decided not to be implemented.
I'm using Advanced REST Client to test external API which requires me to specify
Connection: Keep-Alive. The connection fails (NO RESPONSE) and inspecting Chrome console I noticed Refused to set unsafe header "Connection" followed by net::ERR_INSECURE_RESPONSE
Is there any Chrome settings that allow me to override this? BTW, the API works when I use external tools like APIGee. I've tried Chrome CORS extension (Allow Control Allow Origin) but still unsuccessful.
The issue is that chrome is refusing to load a resource that has an invalid or expired SSL certificate. Even if you could get it to bypass that it would be a bad idea as it would make man in the middle attacks easier in your application.
My suggestion would be (if you trust the server or if it's running locally) to import that certificate to your store so it's trusted in your development environment. If the cert is expired and it's hosted locally look at the documentation on how to change the certificate or to add a self signed one (which you then also would add to your trusted sites)
How to add a self signed very to your store
For Mac
For windows
You'll have to restart chrome for it to see the certs in the store after doing this
Again, be sure you trust these certs origin as they'll be considered trusted as if a legit CA HAD issued them