Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

I am getting sec_error_extension_value_invalid - how do I fix this?

  • 3 replies
  • 44 have this problem
  • 1 view
  • Last reply by cor-el

colin.crook
colin.crook
more options

Hi I recently installed an IBM IPS device which allows you to inspect SSL traffic. The way it does this is a sort of man in the middle and this means you need to download a certificate from the device and import it into your browsers. The process is detailed here for various browsers: http://www-01.ibm.com/support/docview.wss?uid=swg27039297.

Now this works for IE and Chrome and up until a recent update Firefox. I now get the error sec_error_extension_value_invalid.

Any idea on how to resolve this?

Hi I recently installed an IBM IPS device which allows you to inspect SSL traffic. The way it does this is a sort of man in the middle and this means you need to download a certificate from the device and import it into your browsers. The process is detailed here for various browsers: http://www-01.ibm.com/support/docview.wss?uid=swg27039297. Now this works for IE and Chrome and up until a recent update Firefox. I now get the error sec_error_extension_value_invalid. Any idea on how to resolve this?

Chosen solution

Very helpful. It looks as though the CA issued by the device (XGS 4100) doesn't conform. Remediation is to lower the version of Firefox back to 28.0 which is the last version listed in the support matrix.

Read this answer in context 👍 1

All Replies (3)

guigs
guigs
more options

Try this may have more information: https://blog.mozilla.org/security/201.../checking-compliance-status-with-updated-ca-certificate-policy/

colin.crook
colin.crook Question owner
more options

Chosen Solution

Very helpful. It looks as though the CA issued by the device (XGS 4100) doesn't conform. Remediation is to lower the version of Firefox back to 28.0 which is the last version listed in the support matrix.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

It is possible to disable this new feature by disabling libPKIX support, but of course this is not recommended for security and vulnerability reasons.

  • about:config page: security.use_mozillapkix_verification = false