Error code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL

UCS - Univention Corporate Server
#1

Hi, I’m setting up a owncloud appliance and when I finish the configuration I try to access the cloud and I get this error, Error code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL I need your help please, thank you very much

#2

The error code describes an issue which is more related to the used SSL/TLS certificate and its trust than to the UCS/ownCloud setup.
UCS is used a self-signed certificate by default. You will have to establish the trust by importing the root certificate or configure your browser to trust the certificate of the server. In case you have already done this there might be remnants in the browser configuration. You can also make use of a commercial certificate or configure “Lets Encrypt” to get a certificate which is already trusted by your (and your users) browser.

hth,
Dirk

#3

The SEC_ERROR_REUSED_ISSUER_AND_SERIAL error in Firefox indicates that there’s an SSL certificate problem due to the reuse of a certificate’s issuer and serial number. This typically happens when a server presents a certificate that has the same issuer and serial number as a previously used certificate. This can cause confusion and security issues because certificates should be unique.

Steps to resolve the issue:-

  1. Check Certificate Validity
  2. Update the Server Certificate
  3. Clear Browser Cache
  4. Update Server Software
  5. Check your router

The sec_error_reused_issuer_and_serial error in Firefox mainly occurs because of duplicate security certificates in use.

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