Unplanned
Last Updated: 23 Oct 2020 13:03 by Mark DeMichele

I recently am having an issue with MS Teams while running fiddler.  MS Teams keeps giving disconnect errors. That's when I noticed that fiddler it proxying it's traffic even though I have filters set to "Show only the following Hosts", and teams.microsoft.com are not included in the hosts.  I also notice other items in my sessions list that are not in my list of hosts so what is going on?

I don't really want to post my list of hosts publicly.  If you need them, please let me know and maybe I can email them to someone.

 

Pending Review
Last Updated: 23 Oct 2020 07:52 by asdf

Hi!

 

When starting Fiddler Everywhere version 1.1.1, I get an exception in the log file.

Fiddler does not cappture any traffic.

 

Do you know this problem?

How can I solve it?

 

Best regards!

Unplanned
Last Updated: 12 Oct 2020 05:24 by ADMIN

Fiddler’s “Auth” Inspector uses Encoding.Default() for decoding base64-encoded BASIC auth credentials. This was common practice at the time this was first written but is now obsolete. https://tools.ietf.org/html/rfc7617, written much later, demands UTF-8.

Chromium and Firefox encodes credentials using UTF-8.

https://source.chromium.org/chromium/chromium/src/+/master:net/http/http_auth_handler_basic.cc;l=89;bpv=1;bpt=1

Need More Info
Last Updated: 05 Oct 2020 05:22 by ADMIN
Created by: S
Comments: 1
Type: Bug Report
0

When using Fiddler, there seems to be some bugs around resizing the GUI/UI, namely the dividers between sections such as between packet list vs. inspectors panes. It seems that when Fiddler is maximized full-screen, the divider (while using "Wide" layout) is shifted all the way up high, just beneath the initial packet in the list (Fiddler's update check).

I've been able to adjust the UI by manually manipulating Fiddler's registry settings, but even then it still seems finicky -- sometimes they take, sometimes they don't.

v5.0.20202.18177 for .NET 4.6.1
Built: Tuesday, April 14, 2020

Unplanned
Last Updated: 05 Oct 2020 04:51 by ADMIN

Hi everyone.

 

A screenshot of the error is provided, I think there are extra characters in the form, these should not appear, it seems to be caused by a decoding error. Note that the transfer method "transfer-encoding: chunked".


 

Unplanned
Last Updated: 28 Sep 2020 05:13 by ADMIN

If the user configures a list of sites inside Tools > Options > HTTPS > "Skip Decryption for hosts", this configuration list is ignored if the AutoResponder is enabled with the "Accept all connects" checkbox ticked.

This should be fixed because otherwise it's extremely difficult to figure out what's going wrong.

 

Incidentally, this behavior might be responsible for this issue: https://feedback.telerik.com/fiddler/1479071-fiddler-refusing-to-ignore-teams-microsoft-com-and-is-causing-my-ms-teams-app-on-windows-to-break

Unplanned
Last Updated: 02 Sep 2020 10:28 by ADMIN

Hello

I've the following request response:


{
    "proId": 98767975948505330
}

This is correctly displayed in the "Raw Tab", but when switching to the JSON tab, the displayed number is not correct.

https://imgur.com/a/SfsVHkd

Could you fix this ?

Thanks

Unplanned
Last Updated: 26 Aug 2020 18:17 by Jeff

"Target Any Process" feature no longer working with Chrome. It used to work but no longer works specifically with Chrome. Still works with other processes. Capturing still works with Chrome as long as I am not using the "Target Any Process" feature.

Planned
Last Updated: 21 Aug 2020 15:00 by ADMIN
Created by: Casidy
Comments: 1
Type: Bug Report
0

I was using Fiddler, working with AutoResponder, and hit an object reference not set error. I didn't notice anything obvious not working after dismissing the error.

I don't have exact repro steps, but thought I would pass along the stack trace.

 

---------------------------
Uncaught Exception in Session #118
---------------------------
Fiddler has encountered an unexpected problem. If you believe this is a bug in Fiddler, please copy this message by hitting CTRL+C, and submit a bug report at http://www.telerik.com/forums/fiddler.

Object reference not set to an instance of an object.

Type: System.NullReferenceException
Source: Fiddler
   at Fiddler.AutoResponder.(Session , ResponderRule ) in C:\Jenkins\Fiddler_Windows\workspace\FiddlerCore\FiddlerCore.Shared\Common\AutoResponder.cs:line 1787

   at Fiddler.AutoResponder.(Session ) in C:\Jenkins\Fiddler_Windows\workspace\FiddlerCore\FiddlerCore.Shared\Common\AutoResponder.cs:line 2026

   at Fiddler.Session.() in C:\Jenkins\Fiddler_Windows\workspace\FiddlerCore\FiddlerCore.Shared\Common\Core\Session.cs:line 5414

   at Fiddler.Session.‘() in C:\Jenkins\Fiddler_Windows\workspace\FiddlerCore\FiddlerCore.Shared\Common\Core\Session.cs:line 3628

   at Fiddler.Session.(Object ) in C:\Jenkins\Fiddler_Windows\workspace\FiddlerCore\FiddlerCore.Shared\Common\Core\Session.cs:line 3522


Fiddler v5.0.20202.18177 (x64 AMD64) [.NET 4.0.30319.42000 on Microsoft Windows NT 6.1.7601 Service Pack 1] 
---------------------------
OK   
---------------------------
Unplanned
Last Updated: 20 Aug 2020 15:20 by Lutz

I couild highlight a row in the captured data and hit the context menu for Copy | Session and it would copy the data and present it in this type of format when pasted into notepad:

 

PUT https://xxx.xxx.xxx.xxx/service/core/v3/AssetPartitions/-1/DiscoveryJobs/29 HTTP/1.1

GET https://10.5.33.172/service/core/v3/AssetPartitions/1/DiscoveredSshKeys/23/10?page=0&limit=200 HTTP/1.1
Accept-Language: en-US; q=1.0, en; q=0.9
X-SignalR-Id: f83b9717-2553-438f-b76c-4c3e70159a39
Authorization: Bearer eyJhbGciOiJSUzI1NiIsImtpZCI6IjQyRjIzMDlCQzZGMkNFQzNBQzc1MTA3RUQyRTFCREE4NzEwQUI5MUIiLCJ0eXAiOiJKV1QiLCJ4NXQiOiJRdkl3bThieXpzT3NkUkItMHVHOXFIRUt1UnMifQ.eyJBY3R1YWxVc2VySWQiOiIxIiwiQXV0aFRva2VuSWQiOiI2OTdlZDkzOC05YTY1LTQyZDctODI2MS04MGRiYzhkYTE1OWQiLCJyc3RzOnN0czpjbGFpbXM6dXNlcjp1c2VySWQiOiIxIiwidXBuIjoiU3VwZXIiLCJhdXRobWV0aG9kIjoibG9jYWw6cHdkIiwibmFtZWlkIjoiU3VwZXIiLCJuYmYiOjE1ODc0OTI1MzMsImV4cCI6MTU4NzU3ODkzMywiaWF0IjoxNTg3NDkyNTMzLCJpc3MiOiJ1cm46dG9rZW5hdXRoZW50aWNhdGlvbnByb3ZpZGVyOlNBRkVHVUFSRF9BUFBMSUFOQ0UifQ.Leqmwi7cbogsB_XYv9DpJ2SCgCtkl7WsY8Y6pXjfHVSm1P9-82ayeNK_J9rmQUdqZrWjmCeK4DxiyifKAzpgCJm5y0XgUX02jJ5RiD_i8EWOT6ywyxgRRKLefm36jHsWVavLpidJMo4QyOEUGX1OHw0-Cgv2kJyESwkNYLgVQB34WEGMSe2Sh1kVkQrVl-WwcmlckL7yw5rPaofje5lEXrbGMHbNTfBAuei08DVf49DBjV7FGZWRMpvB3mIpWqAZylTXu2DNcfol2ZuVYG1PmTY7pENZGzO98gT7c08Q6wqbZF1846F47oZ2wZXrcYRHkNO8nJ6N7JUN8koGMQ2P6g
Host: 10.5.33.172


HTTP/1.1 200 OK
Cache-Control: no-store, must-revalidate, no-cache
Content-Length: 1872
Content-Type: application/json; charset=utf-8
Content-Language: en-US
Vary: Origin
X-Frame-Options: DENY
X-Content-Type-Options: nosniff
Strict-Transport-Security: max-age=31536000; includeSubDomains
X-XSS-Protection: 1; mode=block
Content-Security-Policy: object-src 'none'; img-src 'self' data:; font-src 'self'
Referrer-Policy: same-origin
X-Cluster-Role: primary
X-TokenLifetimeRemaining: 1433
Date: Tue, 21 Apr 2020 18:16:29 GMT

[{"DiscoveredDate":"2020-04-21T17:20:10.228Z","AccountName":"BobAdmin","AccountDomainName":null,"AccountId":10,"AssetName":"PAM-QA-WIN2019","AssetId":23,"AssetPartitionId":1,"AssetPartitionName":"Import","SshKeyProfileId":1,"SshKeyProfileName":"Import SSH Key Profile","SshKeyDiscoveryScheduleId":15,"SshKeyDiscoveryScheduleName":"Import SSH Key Discovery","PublicKey":"AAAAB3NzaC1yc2EAAAADAQABAAABAQCjJh0+dkm7SMIzhCVPaZTxu0pQA9uhScH26GSxDb5ddoYigi9dlq45/4zal230Nk4o3IQmbP7hLikKTCr2Y3GRUZJEJ8IdQe9zXtGnm+N2iczbmg9kGPcb6j3pMcfxrjZlcOFOXgRaz1tnJXdaSLuM4kI45+sJjtdJ9e/nDdX1HgWVyo0U3CO7q/k/srI1+KaetKW58iCIK6zZnoW8jUhmyXdxA/UkkOwUCdK7kQwOn6kBV7pRgErS1nWmd4RZ7UNi0iSpZdrg6yL7mngLfzS7ee4iZ2Hp3WUY8s1aYhPkDJcJl6uEbxy2NpwLvbUgCWcbJCUPRQUKAdheR7uJuTfF","Comment":"bross@prod@Q3LJ2RQ2","Fingerprint":"4D7280929A77CAD8C0EF03099AF90F4F","KeyType":"Rsa","Options":null,"KeyLength":2048,"AccountStatus":"Managed","IsIgnored":false,"IsManaged":true},{"DiscoveredDate":"2020-04-21T17:20:09.686Z","AccountName":"BobAdmin","AccountDomainName":null,"AccountId":10,"AssetName":"PAM-QA-WIN2019","AssetId":23,"AssetPartitionId":1,"AssetPartitionName":"Import","SshKeyProfileId":1,"SshKeyProfileName":"Import SSH Key Profile","SshKeyDiscoveryScheduleId":15,"SshKeyDiscoveryScheduleName":"Import SSH Key Discovery","PublicKey":"AAAAB3NzaC1yc2EAAAADAQABAAABAQDP1WLHVC8mq6ICGre8OUPi5FQMYxomTGlSgnVqIvIUHLNI8PPH0xpkOpfhlZASzu7WtHWX37LDvEcUqW0gYb0eYww56IeERHui5yuJ7ocJnXETO33W+n0pnYjZuyqxEjSa8P14O6smg5z6bxm+/StItb8GyL1kBdQdoVeVMfWUSUO/2qyvmK22QOS8df2Gl+MWcBvsoU6rrtTq5N9FlS05zFsQJGUt/MrV3qHhKUqviFEZ1sl5ziisRknWInCb+YTkq7a5HFSbSAjxHZDjwPJ92gTWs+W/n6GsSY9Xjnjx+rFfpD1bSD4JnjwJ2QUsbTLPutJ0CpLFdOUJbgzsQY1N","Comment":"Safeguard_Windows_SSH","Fingerprint":"850585DBE61DE4F2D638EC3DE66CCE83","KeyType":"Rsa","Options":null,"KeyLength":2048,"AccountStatus":"Managed","IsIgnored":false,"IsManaged":false}]

 

Now all I get is the URL...

Pending Review
Last Updated: 29 Jul 2020 12:52 by Eric
Created by: li
Comments: 1
Type: Bug Report
0

Hi,I have a problem,and I need your help,thankyou.

    when I click "Rules" -> "Customize Rules", pop up a prompt: Urhandled exception has occurred in your spplication. If you click Continue, the application will ignore this error and attempt to continue. If you click Quit, the application will close immedi ately.Font Cowrier New' does not support style 'Regular' .

  【My computer system is  windows7 64】

Unplanned
Last Updated: 21 Jul 2020 15:31 by Eric

When loading the SAZ file, the requests are ordered incrementally based on the order they were saved in.

For example, a Fiddler session was sorted by URL and then saved to SAZ. When the file is loaded, the requests are still sorted by URL but the original index numbers are lost and the requests are numbered incrementally as per this sort. This means that it is not possible to sort the session back to the original linear order by clicking on the index column (#) as it was possible to do before the save/load.

I've seen that the original index is saved in the Comments column. This is only a partial solution because:

1. When sorting by this column, a lexical sort is performed meaning the sessions would be numbered: 1,10,100,101,11,12..19,2,20,21 etc...
2. If the request had a comment associated with it, this overrides this feature and the original index number is lost.

Also, I know it's possible to sort by ClientDoneRequest as a good approximation but it obviously doesn't recreate the original order.

It would be beneficial to keep the original index numbers (even including the gaps between them) as there is information there that shouldn't be lost when saving.

 

As always thank you for your work on this wonderful product.

Cheers,

  Ronen

 

 

 

 

Planned
Last Updated: 17 Jul 2020 10:42 by ADMIN
Created by: Sergey
Comments: 2
Type: Bug Report
0

Hello, we have found the issue on the v5.0.20202.18177 for .NET 4.6.1 the session data could be copied only using hot keys.

ctrl+shift+s

but only session url is saved when I try to Copy session by clicking on the menu item.

Unplanned
Last Updated: 24 Jun 2020 12:30 by ADMIN

Removing interception certificates via Fiddler options "Remove Interception Certificates" only removes them from Personal and Trusted Root Certification Authorities of the Local Computer Store.

Certificates located in Current User Store - Trusted Root Certification Authorities  and Intermediate Certificates is not removed.

This certificate is not trusted after using "Remove Interception Certificates" and has status "This CA Root certificate is not trusted because it is not in the Trusted Root Certification Authorities store".

sigcheck -t[u]v doesn't show any warnings.

Tested this on both Windows 7 and 10.

Tried refreshing certmgr, restarting it, and rebooting machine with no success - certificates are still there.

This should

 

Unplanned
Last Updated: 22 Jun 2020 07:13 by Tony

Hi,

I updated Fiddler to v5.0.20202.18177

Progress Telerik Fiddler Web Debugger

v5.0.20202.18177 for .NET 4.6.1
Built: mardi 14 avril 2020

64-bit AMD64, VM: 37,0mb, WS: 65,0mb
.NET 4.8 WinNT 10.0.18362.0

You've run Progress Telerik Fiddler: 17 times.

Running on: xxxx:8888
Listening to: All Adapters
Gateway: No Gateway

Copyright ©2003-2020 Progress Software Corporation. All rights reserved.and started to get error at launch

then i started to get error at launch : Failed to register Fiddler as the system proxy

I found a possible solution : change "WinHttp Web Proxy Auto-Discovery Service" startup to automatic

a reboot later, Fiddler worked fine 

but today, the error is back

i checked, the service is still in automatic startup

 

So i get a previous installer, and installed a previous version and the error is gone

Tried to update again, the error come back, rollbacked to previous version, working again

Progress Telerik Fiddler Web Debugger

v5.0.20182.28034 for .NET 4.6.1
Built: mercredi 27 juin 2018

64-bit AMD64, VM: 62,0mb, WS: 118,0mb
.NET 4.7.1 WinNT 10.0.18362.0

You've run Progress Telerik Fiddler: 18 times.

Running on: xxxx:8888
Listening to: All Adapters
Gateway: Auto-Config
	Offline/disabled

Copyright ©2003-2018 Telerik EAD. All rights reserved.

Didn't found any thread on the forum about this issue

Unplanned
Last Updated: 17 Jun 2020 08:19 by ADMIN
Created by: Tony
Comments: 1
Type: Bug Report
0

Hi,

When i started latest version of Fiddler, i started to get an error window at launch saying "Failed to register Fiddler as the system proxy"

But as usual, i have plenty opened windows at the same time.

While i'm doing a search for a solution, Fiddler and the error window goes to background.

But when i come back to Fiddler, i'm unable to exit the application.

The error windows is not referenced in the taskbar and it's a pain to find it.

The best solution is to go to desktop "Win+D" and focus on Fiddler to get the splash screen and the error window visible again.

Once the error window closed, i can close Fiddler.

The issue is the error window staying on background and not having an entry in taskbar.

Declined
Last Updated: 11 Jun 2020 10:20 by ADMIN
Unplanned
Last Updated: 27 May 2020 07:39 by ADMIN

Just installed on Windows 10 Version 1909 OS 18363.836.  Hangs whenever I try to do Step 1 of the docs, set decryption.  Debugged in VS 2019, access violation trying to read 0x00000, NullException.  Finally, shutdown all of my work and restarted machine.  Error cleared and this time asked me to accept the new Cert.  

What a terrible first time experience.  Issue resolved.

Pending Review
Last Updated: 22 May 2020 00:07 by Robin
Created by: Robin
Comments: 2
Type: Bug Report
1

Using iOS 13.4.1

Using Catalina 10.15.4

Using Fiddler for Mac

I have followed this https://www.telerik.com/blogs/how-to-capture-ios-traffic-with-fiddler blog post for configuration. 

But when I try to go to the http://ip4v.fiddler:8888 I get the below error

[Fiddler] DNS Lookup for "ip4v.fiddler" failed. System.Net.SocketExceptionFactory+ExtendedSocketException Device not configured

 

Duplicated
Last Updated: 15 May 2020 18:44 by ADMIN
1 2 3 4