Unplanned
Last Updated: 18 Jan 2021 07:32 by ADMIN

https://twitter.com/ozziepeeps/status/1349126308454830082

 

Basically, the problem here is that if we're AutoAuthenticating when reissuing a request, we try to strip any default Auth header.

 

There's code that looks like

 

   if (theFlags.ContainsKey("x-AutoAuth") && newSession.requestHeaders["Authorization"].OICContains("NTLM") 

//... strip the header

The problem is that we should only be looking at the very first token of the Authorization header (e.g. before the first space). We should not search the whole header, because if the header is

 

    Authorization: Bearer BlahblahblahNtLMblahblah

 

we think it's an NTLM header and strip it. 

 

Need More Info
Last Updated: 06 Jan 2021 08:45 by amez
Created by: jeriko
Comments: 2
Type: Feature Request
0

For now fiddler just have filter, and it not ignore traffic. Filter just hiding it.

Also Fiddler have option "Capture/Dont capture traffic" via menu File or F12. but it general for all. Also this option NOT work while the target app still use fiddler proxy.

My example problem :

I am using Nox to test MyDownloader app, while apk connect internet or requesting web data its ok to proxified by fiddler. But when I start downloading, the file is downloaded first to Fiddler cache until complete. after complete then fiddler continue request with that file response. That the problem. This also applied to all request in my PC. No problem if size just 20MB. But above 100M, 500MB, 1GB, sometime it make fiddler hang.

Also when i download file, then cancel it, fiddler still download file until complete. So to cancel that in fiddler, i need to disconnect it first.

 

For now, to bypass my problem i also using Proxi*fi*er filter to selecting mimetype.

 

Won't Fix
Last Updated: 21 Dec 2020 07:15 by ADMIN
Created by: Imported User
Comments: 2
Type: Feature Request
2
if you reboot your computer on Windows 10 with fiddler open, then it kills your network connection. One the computer boots up again, you have to reopen fiddler.
Unplanned
Last Updated: 17 Dec 2020 07:17 by ADMIN

Response headers named


  Cross-Origin-Embedder-Policy
  Cross-Origin-Resource-Policy
  Cross-Origin-Opener-Policy

 

Should be added to the "Security" section of the Response Headers inspector. These are important security headers added to the web platform, and looking for them will become increasingly common and important.

Need More Info
Last Updated: 06 Dec 2020 06:31 by Eric

Hello dear fiddler support.

 

The bug i've found is: Fiddler doesn't support some encryption ciphers.

 

Recently I was trying to connect to https://inlat.am/ site with "Decrypt SSL traffic" option set in fiddler to my genuine surprise i couldn't even connect to site.

I am using chrome 87.0.4280.88 64bit  and fiddler v5.0.20204.45441 for .NET 4.6.1

Without  "Decrypt SSL traffic" option set in Fiddler - chrome works fine.

 

So i decided to investigate what actually happen.

I run to https://www.ssllabs.com/ site to check supported ciphers - here you can check it https://www.ssllabs.com/ssltest/analyze.html?d=inlat.am&s=18.159.255.107

and tried to reproduce the issue with wirshark  on.

 

In wire shark i can see that there is no ciphers supported by https://inlat.am/ site 

Cipher Suites (24 suites)
    Cipher Suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 (0xc028)
    Cipher Suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 (0xc027)
    Cipher Suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)
    Cipher Suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013)
    Cipher Suite: TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 (0x009f)
    Cipher Suite: TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 (0x009e)
    Cipher Suite: TLS_RSA_WITH_AES_256_GCM_SHA384 (0x009d)
    Cipher Suite: TLS_RSA_WITH_AES_128_GCM_SHA256 (0x009c)
    Cipher Suite: TLS_RSA_WITH_AES_256_CBC_SHA256 (0x003d)
    Cipher Suite: TLS_RSA_WITH_AES_128_CBC_SHA256 (0x003c)
    Cipher Suite: TLS_RSA_WITH_AES_256_CBC_SHA (0x0035)
    Cipher Suite: TLS_RSA_WITH_AES_128_CBC_SHA (0x002f)
    Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 (0xc02c)
    Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (0xc02b)
    Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 (0xc024)
    Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 (0xc023)
    Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (0xc00a)
    Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (0xc009)
    Cipher Suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 (0x006a)
    Cipher Suite: TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 (0x0040)
    Cipher Suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA (0x0038)
    Cipher Suite: TLS_DHE_DSS_WITH_AES_128_CBC_SHA (0x0032)
    Cipher Suite: TLS_RSA_WITH_3DES_EDE_CBC_SHA (0x000a)
    Cipher Suite: TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA (0x0013)

 

Now i now what the issue is about.

My question is how to fix the problem with ciphers.

In my opinion you should somehow add it in Fiddler.

 

 

 

 

Need More Info
Last Updated: 06 Dec 2020 06:25 by Eric
Since one of the last updates, Fiddler takes ages to start. Its in the range of Minutes on some machines. Can we please fix this?
Unplanned
Last Updated: 04 Dec 2020 13:57 by ADMIN
Created by: Ahsen
Comments: 4
Type: Bug Report
2

Hello,

I am getting the following error in fiddler and without Capture HTTPS CONNECTs it works, also in the Protocols I have enabled: <client>;ssl2;ssl3;tls1.0;tls1.1;tls1.2

fiddler.network.https> HTTPS handshake to <domain> (for #6) failed. System.Security.Authentication.AuthenticationException A call to SSPI failed, see inner exception. < The message received was unexpected or badly formatted

Win32 (SChannel) Native Error Code: 0x80090326

Ashen

[Edited by Telerik Staff to remove personal information and convert to bug report]

Won't Fix
Last Updated: 03 Dec 2020 14:42 by ADMIN
Created by: Poor
Comments: 1
Type: Bug Report
2

In the Good Old Times™ "give feednback" just mean "give feedback".

Well, here is your feedback.

Why do i have to

  • create an account I need like Aids
  • confirm the account  I need like Aids
  • set a password to an account I need like Aids
  • log in with said account I need like Aids
  • click the "report bug" button (finally)
  • getting interrupted again by some page who tries to trick me in a fucking search
  • find the "yes I really really want to report that bug" button
  • and finally after all the above being able to GIVE SOME FUCKING FEEDBACK?

Why are you wasting my time? I did not make it buggy, it was you!

Unplanned
Last Updated: 27 Nov 2020 10:06 by ADMIN

When I go to File | Save | All Sessions it defaults to a directory (that is not where I want to store the debug information I collected).  

I store all problems I am working on in a different directory structure.  When I go to SAVE my debug session I would like to set the Default directory (structure) where I save all my other documentation for problems I am working on.  Having to "re-find" my documentation folder multiple times in 20 minutes of saving multiple debug sessions is tedious and non-productive.

I suggest a user preference that has these options:

Set default directory to: ..........   (It will always open to here when a SAVE is done)

Follow Last SAVE directory:  (Check box)     This will open whatever directory location you last did a SAVE to

User Fiddler's Default Location:  (Check box)     This is like a "Reset" to Fiddler's default location.

 

 

Unplanned
Last Updated: 18 Nov 2020 15:26 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

 

 

 

 

Unplanned
Last Updated: 16 Nov 2020 08:24 by ADMIN

This bug occurs in both Fiddler and Fiddler Everywhere so you may want to take a look.

The system I'm running on is Win7x64 with latest patches loaded.

Note that when Fiddler/Fiddler Everywhere is not loaded, I can access this website normally.

====== Message from Fiddler v5.0.20204.45441 for .NET v4.6.1 Built: 2020-11-03 ======
HTTP/1.1 200 Connection Established
FiddlerGateway: Direct
StartTime: 10:19:31.203
Connection: close

fiddler.network.https> HTTPS handshake to devblogs.microsoft.com (for #14) failed. System.Security.Authentication.AuthenticationException 呼叫 SSPI 失敗,請查看內部例外狀況。 < 接收到的訊息超出預期或格式不正確。

Win32 (SChannel) Native Error Code: 0x80090326


====== Message from Fiddler Everywhere 1.2.1 Built: Friday, November 6, 2020 ======
fiddler.network.https> HTTPS handshake to devblogs.microsoft.com (for #17) failed. System.Security.Authentication.AuthenticationException Authentication failed, see inner exception. < 接收到的訊息超出預期或格式不正確。

Win32 (SChannel) Native Error Code: 0x80090326
Won't Fix
Last Updated: 06 Nov 2020 17:51 by Eric

我想修改一下Composer的功能,

请问Eric:

1. 在代码里Fiddler有什么方法可以把发送的请求信息记录到Composer History列表?(重点

2. 点击Excute按钮,是怎么把请求记录下来的?记录的请求保存在什么位置?

期待Eric的答案。

Won't Fix
Last Updated: 05 Nov 2020 07:03 by Adam
Created by: Adam
Comments: 4
Type: Bug Report
0
We downloaded Fiddler Classic from our site for evaluation, and when we try to distribute it via Google Drive (we are enterprise subscribers), we get a virus warning, and the download is not allowed.

I'm guessing this is a false positive, but want to verify that with you, and see if you know why it might be flagged as virus by Google's scanning service.

We are holding off distributing or evaluating the product for now, erring on the side of caution.

Best,

--
Adam Creighton
Studio Head, Enduring Games
Need More Info
Last Updated: 02 Nov 2020 13:02 by ADMIN

Hi,

I'm testing a website that has a self signed SSL cert. I can navigate to this URL via an extra warning step on chrome (see attached screen shot).

However via Fiddler, I just get an error that "this site cannot be reached" and I can see it's dropped on the Fiddler side: I can see the tunnel CONNECT request, but no subsequent request.

I've enabled the option "Ignore server certificate errors (unsafe)" and restarted Fiddler, but the problem still persists.

 

As always, thank you for your work on this.

Ronen

 

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.

 

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

Won't Fix
Last Updated: 08 Oct 2020 17:09 by Jason

Please consider refraining from (or at least making optional) the sorting of the JSON property keys when using the JSON tree viewer.  For code which sends out complex payloads, having the properties reordered makes it hard to compare the tree to the actual payload sent.  For example, we send startXXX and endXXX properties at the end of our payload, and when Fiddler moves "endXXX" to the top of the tree, debugging becomes a pain.  Please allow the payload to be tree-visualized as constructed.

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

Completed
Last Updated: 05 Oct 2020 05:18 by ADMIN
Created by: Kostas
Comments: 26
Type: Feature Request
63
I find myself applying the same filters again and again on each launch of Fiddler (I mean the filters listed below the list of requests).

I think it would be really great if you could allow the restoration of previously applied filters (e.g. by having a save/load filters option).

Also, allowing to filter out by "Request Method" would be great too.

Congratulations on this tool, by the way.

It is really great. :)
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".


 

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