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browser warning: potential security risk ahead - ssl_error_bad_cert_domain

the situation: we publish an internal wiki website in our intranet. the delivering server provides a certificate issued by our own microsoft active directory pki (root-in… (read more)

the situation: we publish an internal wiki website in our intranet. the delivering server provides a certificate issued by our own microsoft active directory pki (root-intermediate-servercert). firefox is configured by gpos in order to use windows cert store, where root and intermediate are installed. but nevertheless firefox drops an error message ssl_bad_cert_domain and i do not see why. in chrome or chromium based edge everything is fine. no ssl warnings. as you can see in the attached screenshot the cert includes various san fields for different host names, which includes two ip addresses (anonymized).

any advice what do to is mostly appreciated.

thanks a lot peter

Asked by El Viejo 10 months ago

Answered by El Viejo 10 months ago

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Can't fix SEC_ERROR_REUSED_ISSUER_AND_SERIAL as described

Hi all, while playing (or better "fighting"...) with a linux docker container on Win10/WSL2/Ubuntu for using the MS spfx tool chain, I generated a SEC_ERROR_REUSED_ISSUER… (read more)

Hi all,

while playing (or better "fighting"...) with a linux docker container on Win10/WSL2/Ubuntu for using the MS spfx tool chain, I generated a SEC_ERROR_REUSED_ISSUER_AND_SERIAL in FF85.0/Win10 by first setting up a certificate exception for a dev-cert (https://localhost:4321) and then have the certificate re-created.

As described the support article [https://support.mozilla.org/en-US/kb/Certificate-contains-the-same-serial...], I removed all certificate exceptions for localhost:* and deleted the "gulp" authority in options/security/certificates.

Unfortunately, the SEC_ERROR_REUSED_ISSUER_AND_SERIAL persists even after a restart of firefox.

Any help is very much appreciated...

Thanks & greetings Markus Fehn

Asked by markus.fehn 10 months ago

Last reply by FredMcD 10 months ago

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Websites open in Firefox 84.0 but not in 85.0 after upgrade. Other browsers work fine. Windows 10

Summary: On windows 10, getting error messages on websites including big names like logitech.com after firefox updates from 84.0 to 85.0. Reinstall of 84.0 and sites wor… (read more)

Summary: On windows 10, getting error messages on websites including big names like logitech.com after firefox updates from 84.0 to 85.0. Reinstall of 84.0 and sites work again. Other major browsers also work fine.

Specific error message is: Secure Connection Failed" "An error occurred during a connection to ***websitehere***. PR_END_OF_FILE_ERROR." "The page you are trying to view cannot be shown because the authenticity of the received data could not be verified."

Troubleshooting: - I did an uninstall on the machine and deleted all mozilla folders from program files / app data followed by a fresh install of firefox 85.0 on machine, didn't help. - I uninstalled firefox again and wiped folders then installed 84.0 and turned off updates. All websites work fine. After auto update to 85.0, sites don't work again. - Cleared cache/history/etc and even created a new profile. Nothing helps. - Doesn't happen on all machines I don't think but is starting to appear on several and that number has been increasing over the last 2 days. I haven't looked to see if I could find someone's machine that has 85.0 and is working besides mine yet.

Side note: - I received a replacement laptop on Wednesday for work and did all windows updates prior to installing any programs, domain join, etc. As part of the program loadout I install, firefox is included in that list. I installed 85 available from the website and logitech.com works fine.

Ending comment: - Appears to be some kind of issue that happens right after firefox does it's update and whatever the root cause is sticks behind after an uninstall and deletion of all the folders. Maybe something in the registry?

With how many computers this is starting to show up on now, it would appear that this should be noticed by others and I wanted to reach out and make sure Mozilla is aware.

Asked by bcook6 10 months ago

Last reply by FredMcD 10 months ago