Fiddler Classic - Trusted Root Cert expired June 12 '21

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Fiddler Classic Windows
DLipman
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DLipman asked on 21 Jul 2021, 06:58 PM

I wanted to obtain the HTTPS POST URL generated from a "highly obfuscated" Phish in HTML format.  But I had problems.

I exported the Certificate generated by Fiddler Classic, v5.0.20204.45441, and I was surprised to see the Certificate expired on 6/12/'21.  I see that that is is the last released version.

Is there an update to Fiddler Classic that will generate a Trusted Cert that is current and not expired ?

 

 

 

Lini
Telerik team
commented on 22 Jul 2021, 02:16 PM

The Fiddler root certificate can be regenerated from the options > HTTPS tab. Click on the Actions button at the top right, then "Reset All Certificates...". There will be multiple prompts from the OS - to remove old certificates and add newly generated ones. You must accept all prompts to complete the process.
DLipman
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commented on 22 Jul 2021, 02:21 PM | edited

Thank you. Just what the Doctor ordered. New Cert expires 7/20/2031

Xiexie ni
DLipman
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commented on 22 Jul 2021, 03:05 PM

It worked. I was finally able to obtain the HTTPS POST URL of harvested, but encoded, credentials.

Obrigado.
Osric
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commented on 25 Sep 2023, 03:58 PM

Just to add, I was in a similar situation.
Uninstalling and reinstalling Fiddler was one approach we tried, and it DIDN'T resolve the certificate expiry date issue, as the certificate persisted when everything else was blown away.
The reason my Fiddler wouldn't work was really tricky to track down.
Nick Iliev
Telerik team
commented on 26 Sep 2023, 05:35 AM

Hey Osric,

The reinstallation of Fiddler won't remove the installed certificate authority (and thus won't resolve the expiration date issue). As @Stoyan noted, you must use the "Reset All Certificates" option from the Settings menu.

No answers yet. Maybe you can help?

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