SerComm Network Device Backdoor Detection

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Exploit::Remote::Tcp  
include Msf::Auxiliary::Scanner  
include Msf::Auxiliary::Report  
  
def initialize(info={})  
super(update_info(info,  
'Name' => 'SerComm Network Device Backdoor Detection',  
'Description' => %q{  
This module can identify SerComm manufactured network devices which  
contain a backdoor, allowing command injection or account disclosure.  
},  
'Author' =>  
[  
'Eloi Vanderbeken <eloi.vanderbeken[at]gmail.com>', # Initial discovery, poc  
'Matt "hostess" Andreko <mandreko[at]accuvant.com>' # Msf module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'CVE', '2014-0659' ],  
[ 'OSVDB', '101653' ],  
[ 'URL', 'https://github.com/elvanderb/TCP-32764' ]  
],  
'DisclosureDate' => '2013-12-31' ))  
  
register_options([  
Opt::RPORT(32764)  
])  
end  
  
def do_report(ip, endianness)  
report_vuln({  
:host => ip,  
:port => rport,  
:name => "SerComm Network Device Backdoor",  
:refs => self.references,  
:info => "SerComm Network Device Backdoor found on a #{endianness} device"  
})  
end  
  
def run_host(ip)  
begin  
connect  
sock.put(Rex::Text.rand_text(5))  
res = sock.get_once  
disconnect  
  
if (res && res.start_with?("MMcS"))  
print_good("#{ip}:#{rport} - Possible backdoor detected - Big Endian")  
do_report(ip, "Big Endian")  
elsif (res && res.start_with?("ScMM"))  
print_good("#{ip}:#{rport} - Possible backdoor detected - Little Endian")  
do_report(ip, "Little Endian")  
else  
vprint_status("#{ip}:#{rport} - Backdoor not detected.")  
end  
rescue Rex::ConnectionError => e  
vprint_error("#{ip}:#{rport} - Connection failed: #{e.class}: #{e}")  
end  
end  
end  
`