I built a website some time ago with Flask. Now all of a sudden when I try to navigate there I get the following:
NET::ERR_CERT_COMMON_NAME_INVALID
Your connection is not private
Attackers might be trying to steal your information from www.mysite.org (for example, passwords, messages, or credit cards). Learn more
Does anyone know what's going on?
The error means: The host name you use in the web browser does not match one of the names present in the subjectAlternativeName extension in the certificate.
If your server has multiple DNS entries you need to include all of into the certificate to be able to use them with https. If you access the server using it's IP address like https://10.1.2.3 then the IP address also have to present in the certificate (of course this only makes sense if you have a static IP address that never changes).
The certificate subject alternative name can be a domain name or IP address. If the certificate doesn’t have the correct subjectAlternativeName extension, users get a NET::ERR_CERT_COMMON_NAME_INVALID error letting them know that the connection isn’t private. If the certificate is missing a subjectAlternativeName extension, users see a warning in the Security panel in Chrome DevTools that lets them know the subject alternative name is missing.
https://support.google.com/chrome/a/answer/7391219?hl=en
For Chrome 58 and later, only the subjectAlternativeName extension, not commonName, is used to match the domain name and site certificate. So, if you are missing the Subject Alternative Name in your certificate then you will experience the NET::ERR_CERT_COMMON_NAME_INVALID error.
In order to have a Subject Alternate Name (SAN) on an SSL certificate, you must first edit your OpenSSL configuration. On Ubuntu/Debian, that can be found at /etc/ssl/openssl.cnf Find the section of that file with the heading [ v3_ca ], you can add the line with your SAN there:
subjectAltName = www.example.com
Related
The browser reports that the connection is insecure, so the certificate hasn't loaded correctly. However, then manually opening the website it loads correctly.
Can anyone tell me how to fix Invalid certificate issue, It's result in to launching the wrong URL.
I tried with "chromeWebSecurity": false in my cypree.json, but no luck.
Please help me to solve this issue.
I haven't done this myself, but Cypress docs say that it's expected: You'll notice Chrome display a warning that the 'SSL certificate does not match'. This is normal and correct.
Note, that Cypress allows you to optionally specify CA / client certificate
https://docs.cypress.io/guides/guides/web-security#Examples-of-what-Cypress-does-under-the-hood.
So if the fake Cypress certificates are causing issues for you, you can try supplying your own certificates.
if it is not your website, you cannot fix it.
what you can do is verify why it is invalid, and decide to accept it and still open an https connection with the server although the certificate isn't valid.
usually the steps are:
click Advanced button
read and understand
click Accept or close the tab
the common reasons for a certificate to be invalid are:
domain name invalid, the certificate is installed for multiple vhost, and you have accessed the service for a domain name not defined in the certificate. www. is required, only * is specified without empty domain. totally wrong domain name. etc.
certificate is expired. check the date, it might be expired and decided if that makes sense to you
certificate isn't trusted, self-signed or using an authority not trusted by your browser.
if it is your website, these are the same reason, so you should be able to replace the certificate with an appropriate one.
by the way, this might not be a question for stackoverflow, maybe more for superuser, but I am happy to answer it anyway.
hope this helps you and others
cheers,
I'd like to connect to my website via https urls also if at the moment I don't have any certificate. I want to do this to test the URL structure on all pages. Is this possible?
If I digit https://www.example.com I see a blank page.
There is no way to get around needing a certificate for an https connection, however you can go for the free option of a self-signed certificate. Have a look into a service such as http://www.selfsignedcertificate.com/ to get the key and certificate created for your website.
Is there a way to change the Fiddler's root certificate. I want it for a scenario when the client app uses certificate pinning and I have access to the keystore, whose certificate is being trusted by the client app.
I think you're asking "Can I change the certificate Fiddler uses for a particular site" rather than the root certificate, which is used for all sites.
Yes, if you really do have the private key for the certificate, you can configure Fiddler to use it. Inside Fiddler's Rules > Customize Rules > OnBoot function, you can call either:
CertMaker.StoreCert("example.com", certMyCert);
or
CertMaker.StoreCert("example.com", "C:\\temp\\cert.pfx", "TopSecretPassword");
The first call requires that your X509Certificate2 variable (certMyCert in this case) refer to a certificate that is already installed in your computer's Certificate Manager (certmgr.msc), so its private key can be found, while the second allows you to specify a PFX file from disk.
We are getting security message like this while executing url:
There is a problem with this website's security certificate. The security certificate presented by this website was not issued by a trusted certificate authority.
Security certificate problems may indicate an attempt to fool you or intercept any data you send to the server. We recommend that you close this webpage and do not continue to this website. Click here to close this webpage. Continue to this website (not recommended).
More information
Same type of security alerts with message like this
This page is accessing information that is not under its control. This poses security rish, DO you want to continue?
How to avoid them through code either javascript, jsp or any way. We can not ask each user to modify their internet options. Please let me know if there is any solutions for this
That's browser behavior that you can't and shouldn't be allowed to modify using JavaScript, or anything else for that matter. In fact, these security alerts are there to warn the user that something is (potentially) wrong. If you could disable them, there would be no point in having them, right?
Fix whatever problems you have with the security certificate and you'll be fine. I'll guess here that your certificates are self-signed - buy one. They are not that expensive.
You need to install a current, valid certificate on your web server.
There is a problem with this website's security certificate could mean you need to check that the clock is set correctly.
Host all content on an https website. not an http one. You do not need a certificate then.
1> The security certificate presented by this website was not issued by a trusted certificate authority.
This message indicates that the page is using a HTTPS-based resource which has a certificate which does not chain to a globally trusted root certificate. If you don't know what resources/URLS are causing this, open the F12 Developer Tools and look at the Console tab, or run Fiddler and watch for the warning popup.
2> This page is accessing information that is not under its control. This poses security risk, DO you want to continue?
This message is shown when you attempt to use an XMLHTTPRequest object to request data from a cross-domain location (e.g. www.domain.com tries to grab data from domain.com). That operation is a violation of Same-Origin-Policy.
By default in IE, this is blocked, but inside the Intranet Zone, this feature is set to Prompt and thus you see this message instead.
To fix this, either change the request URL so that it does not go to a different domain, or use XDomainRequest, or use a serverside proxy page to make the cross-origin data request from the server rather than the client.
The Problem:
I am creating a vb6 application that will connect to a particular web service located on a a HTTPS site. The problem is, the HTTPS site I'm accessing requires all request to accept it's certificate policy. (as its a self-signed ssl certificate)
Basically I need the application to accept security certificate dialog boxes automatically. A sample security dialog is shown below:
Cheers in advance.
#EDIT:
I Cant' post an image yet as i am a new user... Please see the url below for a sample image:
http://oit.nd.edu/network/nomad/images/ie_certs.gif
Look for a property named Silent.
You will have to catch some other event, to reply to that dialog box. Although, I am not sure what is the behavior, if you set the Silent to true (i.e does it assume it to be Yes or otherwise?).
Most of HTTPS sites I know use self-signed certificates.
I don't know VB6 APIs for HTTPS, but for example in Java you should provide it a copy of the site certificate beforehand. That is:
export a copy of the certificate, for example from your browser certificate repository (in Firefox: Tools->Options->Advanced->Encryption->View Certificates etc.) - supposing you have have already visited the site with your browser;
detect which certificate repository your HTTPS API points to (there certainly is one)
import certificate into that repository
execute your program