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From: Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>
Date: Sun, 23 Apr 2023 06:11:56 +0700
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Subject: Re: CF ticketing system is still vulnerable
To: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Cc: Michael William Jonathan <moe@chocola.dev>, "GNU/Weeb Mailing List" <gwml@vger.gnuweeb.org>
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On Sun, Apr 23, 2023 at 6:06=E2=80=AFAM Ammar Faizi wrote:
> On Sun, Apr 23, 2023 at 05:58:09AM +0700, Alviro Iskandar Setiawan wrote:
> > Back to this again, I am not sure if the fix is proper. I get HTTP 500
> > when accessing it from libcurl in my C program:
> >
> [...]
> > > {"success":false}
> >
> > But if I access it from curl cmd:
> [...]
> > > {"success":true,"etickets":[<snip>]}
> >
> > That means it's not fixed. Also, HTTP 500 indicates internal server
> > error. It seems something goes very wrong with their fix attempt. So
> > yes, it's still vulnerable when I write this email.
>
> In other words, they only block your POC, but the endpoint is still
> accessible if you use another program?

Yes. But I'm not sure what the difference is. I'm fully confident that
the header requests I sent via my POC and via curl cmd are the same.

Summary:
- Access from browser: {"success":false}
- Access from my POC: {"success":false}
- Access from XHR (real login with cookies):  {"success":true,
"etickets": [...]}
- Access from curl cmd (no cookies):  {"success":true, "etickets": [...]}

I guess it's something about CDN. But I don't have enough info to make
a conclusion about the technical details.

-- Viro